FIELD OF INVENTION
[001] The present disclosure relates to voltage regulation in electrical system. More particularly, the present disclosure relates to a voltage regulation system for regulating voltage with smooth cut-off when there is variation in the input voltage supply, thereby achieving better stability and transient immunity.
BACKGROUND OF THE INVENTION
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art. [003] Voltage balancing is an essential factor to ensure continuous power supply to the equipment(s) in electrical system. In case when the load across all the phases is not uniformly distributed, the problem of voltage unbalancing rises. As a result, a noise component get induced in the line current and line voltage, which ultimately affects the function of the equipment in the electrical system. The voltage unbalancing becomes a more severe problem in case of low line voltage, as there is heavy current being drawn at low voltage levels. The increase in current results in increase in heat across winding and coils of the equipment, which causes damages to insulation. As a result, the life of the equipment is drastically reduced. [004] Further, in case when Power Factor Controller (PFC) is implemented to reduce reactive power generated by equipments such as fluorescent and high bay lighting, arc furnaces, induction welders, battery chargers etc., heavy reluctance (high audible noise, arching) is offered by the PFC at the lower voltage. As a result, the power supply and the load/equipment may get damaged. Typically, the equipment offers a very high reactive power to the source of supply voltage causing stress to the components resulting in failure of equipment.
[005] Therefore, low line cut-off solves the problem of voltage unbalancing at low voltage so as to prevent damage to the equipment. However, low cut-off or high cut-off circuits suffer with certain limitations.

[006] FIG. 1A illustrates a conventional bipolar junction transistor (BJT) based voltage regulation system 101-1. The voltage regulation system utilizes the BJT to limit the power supply operation within an upper level and a lower level. The input voltage level is sensed by the voltage divider comprising of resistances Rl, R2, R3 and R4||R5, where resistances Rl, R2, R3 and R4||R5 determines the high cut-off voltage. The resistances R6, R7, R8 and R9 determines the low cut-off margin. All voltage levels lying between the low cut-off and high cut-off margins form the input operating range. The decrease in base -emitter voltage (VBE) across BJT with rise in temperature causes an obvious shift in low cut-off margin, and as a result the equipment remains operational at even input voltage levels below the pre-set low cut-off margin.
[007] FIG. IB shows another voltage regulation system 101-2 used to cut-off voltage by a programmable precision reference device such as the TL431/TL432. High cut-off working remains the same as in BJT based cut off circuit. At voltages below the low cut-off margin, IC TL431 - U2 opens, causing the IC TL431 Ul to turn ON, thereby turning off the equipment.
[008] Both the voltage regulation systems 101-1 and 101-2 (collectively referred to as voltage regulation systems 101 or individually referred to as voltage regulation system 101) can be illustrated in the form of a block diagram shown in FIG. IC. The voltage regulation system 101 may include an input circuitry 102 that may receive the input voltage. Upon filtration and rectification of the input voltage, the input voltage is fed to the amplifying circuitry for amplification, which then goes to an output circuitry 106 where the output voltage is regulated. [009] However, both the cut off circuit as illustrated in FIGs. 1A and IB fail to provide smooth cut-off. Specifically, when there is change in line voltage below or above threshold cut-off voltage, the output of the system is cut-off instantaneously, which creates stress on components and the equipment, thereby reducing the life of the equipment. Therefore, there is a need for an improved voltage regulation system, which overcomes above-mentioned and other limitations of existing approaches.

[0010] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
OBJECTIVE OF THE INVENTION
[0011] Some of the objects of the present disclosure, which at least one
embodiment herein satisfies are as listed herein below.
[0012] A general object of the present disclosure is to provide a voltage regulation
system that provides smooth and steady cut-off in the electrical system.
[0013] It is an object of the present disclosure to provide a voltage regulation
system that eliminates unwanted transient or disturbance in line without increasing
any other resources.
[0014] It is an object of the present disclosure to provide a voltage and current
stability for smooth operation of the equipment in the electrical system.
[0015] It is an object of the present disclosure to provide a voltage regulation
system that provides better transient immunity to achieve higher mean time between
failure (MTBF).
[0016] Various objects, features, aspects and advantages of the present disclosure
will become more apparent from the following detailed description of preferred
embodiments, along with the accompanying drawing figures in which like numerals
represent features.
SUMMARY
[0017] The present disclosure relates to voltage regulation in electrical system. More particularly, the present disclosure relates to a voltage regulation system for regulating voltage with smooth cut-off when there is variation in the input voltage supply, thereby achieving better stability and transient immunity.

[0018] An aspect of the present disclosure pertains to a voltage regulation system
that includes a boost circuitry configured to receive an input voltage and increase
an amplitude of the input voltage; a sensing circuitry configured with the boost
circuitry and configured to sense the input voltage and generate a corresponding
sensing signal; a feedback circuitry electrically coupled with the sensing circuitry
to receive the sensing signal and configured with the boost circuitry to control duty
cycle of the boost circuitry to regulate the output voltage of the boost circuitry; an
output circuitry electrically coupled to the boost circuitry and configured to receive
the output voltage of the boost circuitry; and a regulatory circuitry configured with
the sensing circuitry and the output circuitry, wherein the regulatory circuitry
configured to regulate the output voltage of the output circuitry.
[0019] In an embodiment, the regulatory circuitry is configured to regulate the
output voltage of the output circuitry between a low cut off voltage and a high cutoff
voltage.
[0020] In an embodiment, the feedback circuitry is configured to increase or
decrease equivalent resistance at the output of the boost circuitry to regulate the
output voltage at the boost circuitry.
[0021] In an embodiment, the sensing signal is generated when the input voltage is
greater than a low cut-off voltage.
[0022] In an embodiment, the sensing circuitry is configured to sense the input
voltage by detecting magnitude of the input voltage and characteristics of the input
voltage, and wherein the characteristics of the input voltage indicate whether the
input voltage is increasing or decreasing in nature.
[0023] In an embodiment, when the input voltage lies between a low cut-off voltage
and a first threshold voltage, and the input voltage is increasing in nature, the
feedback circuitry is configured to reduce equivalent resistance at the output of the
boost circuitry and the regulatory circuitry is configured to reduce equivalent
resistance at the output of the output circuitry, to decrease the output voltage at the
output circuitry, and wherein the first threshold is greater than the low cut-off
voltage and less than a rated voltage.

[0024] In an embodiment, when the input voltage lies between rated voltage and a first threshold voltage, and the input voltage is decreasing in nature, the feedback circuitry is configured to reduce equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to reduce equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry, and wherein the first threshold is greater than the low cut-off voltage and less than the rated voltage.
[0025] In an embodiment, when the input voltage lies between the high cut-off voltage and a second threshold voltage, and the input voltage is decreasing in nature, the feedback circuitry is configured to reduce equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to reduce equivalent resistance at the output of the output circuitry to increase the output voltage at the output circuitry, and wherein the second threshold is less than the high cut-off voltage and greater than rated voltage.
[0026] In an embodiment, when the input voltage lies between rated voltage and a second threshold voltage, and the input voltage is increasing in nature, the feedback circuitry is configured to increase equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to increase equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry, and wherein the second threshold is less than the high cut-off voltage and greater than rated voltage.
[0027] In an embodiment, when the input voltage lies between the high cut-off voltage and a second threshold voltage, and the input voltage is increasing in nature, the feedback circuitry and the regulatory circuitry are configured to provide zero output voltage at the output circuitry, and wherein the second threshold is less than the high cut-off voltage and greater than rated voltage.
[0028] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

[0029] Within the scope of this application, it is expressly envisaged that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments unless such features are incompatible.
BRIEF DESCRIPTION OF DRAWINGS
[0030] The accompanying drawings are included to provide a further understanding
of the present disclosure and are incorporated in and constitute a part of this
specification. The drawings illustrate exemplary embodiments of the present
disclosure and, together with the description, serve to explain the principles of the
present disclosure. The diagrams are for illustration only, which thus is not a
limitation of the present disclosure.
[0031] FIG. 1A illustrates a conventional bipolar junction transistor (BJT) based
voltage regulation system.
[0032] FIG. IB illustrates another conventional voltage regulation system based on
programmable precision reference device.
[0033] FIG. 1C illustrates a block diagram of conventional voltage regulation
system.
[0034] FIG. 2 illustrates an exemplary representation of block diagram of the
proposed voltage regulation system, in accordance with embodiments of the present
disclosure.
[0035] FIG. 3 illustrates an exemplary circuitry of the proposed voltage regulation,
in accordance with embodiments of the present disclosure.
DETAILED DESCRIPTION
[0036] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the

intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims. [0037] If the specification states a component or feature "may", "can", "could", or "might" be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0038] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). [0039] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0040] Embodiments herein relate to a voltage regulation system that provides smooth and steady cut off, which reduces a sharp increase or decrease in current and voltage, thereby providing voltage and current stability in the electrical system. In particular, the voltage regulation system monitors the input voltage and identifies characteristics of the input voltage. The voltage regulation system includes a feedback circuitry that controls the switching duty cycle through a feedback mechanism based on the characteristics of the input voltage. By controlling the switching duty cycle through a feedback mechanism, voltage can be reduced linearly with the change in input voltage when the input voltage lies between the low cut-off voltage and the high cut-off voltage and voltage would be cut-off when the voltage is less than the low-cut off voltage and greater than the high cut-off

voltage. Thus, the voltage regulation system provides smooth cut-off with minimum and noise less transient, which results in an improvement in mean time between failure (MTBF).
[0041] FIG. 2 illustrates an exemplary representation of block diagram of the proposed voltage regulation system, in accordance with embodiments of the present disclosure. As illustrated in FIG. 2, the voltage regulation system 200 may include a boost circuitry 211, a sensing circuitry 221, feedback circuitry 231, an output circuitry 241, and a regulatory circuitry 251.
[0042] FIG. 3 illustrates an exemplary circuitry of the proposed voltage regulation, in accordance with embodiments of the present disclosure. In an embodiment, the boost circuitry 211 may include an input circuitry 201 that may receive an input line alternating current (AC) voltage and convert the input line direct current (DC) voltage. The input circuitry 201 may also include one or more filters to reduce any ripple component from the converted DC voltage. The input circuitry 201 may include one or more electrical components such as but not limited to capacitor(s), a bridge rectifier, a fuse, an inductor(s), and so on. In an embodiment, the boost circuitry 211 may be implemented as a power factor controller (PFC) section or a part of the PFC.
[0043] In an embodiment, the boost circuitry 211 may include an amplifying circuitry 202 that may be configured to increase an amplitude of the input voltage. In an example, the input voltage at the amplifying circuitry 202 may be DC voltage. The amplifying circuitry 202 may include one or more electrical components such as but not limited to resistors Rl, R2, ...R20, capacitors, diodes Dl, D2...D8, a transformer Tl EE55, integrated circuit such as L6562A, and so on. At the output of the amplifying circuitry of the boost circuitry, resistances R5, R8, R13, R18, R17 may be configured as shown in FIG. 3. These resistances form the equivalent resistance at the output of the boost circuitry.
[0044] In an embodiment, the voltage regulation system 200 may include a sensing circuitry 221 that may be configured to sense the input voltage and generate a corresponding sensing signal. The sensing circuitry may include diode D9 e.g., UF4007, filter capacitor C13, line sensing resistors R22, R23, and R25, and an

optocoupler U2. The optocoupler U2 may be configured to move into either of cut off region, active region, and saturation region. The sensing circuitry 221 may be configured to sense the input voltage by detecting the magnitude of the input voltage and characteristics of the input voltage. In an embodiment, the characteristics of the input voltage indicate where the voltage is increasing or decreasing in nature. Based on the sensed characteristics i.e. magnitude and increasing/decreasing nature of the input voltage, the sensing signal is generated. [0045] In an embodiment, the optocoupler may be operated in active region or saturation region when the input voltage is greater than a low cut-off voltage. In other words, the sensing signal is generated when the input voltage is greater than a low cut off voltage, where the low cut-off voltage refers to a minimum voltage at which the equipment to be connected with the voltage regulation system can be operated safely. Additionally, or alternatively, the sensing signal is not generated if the input voltage is less than the low cut-off voltage. In an example, the sensing circuitry may sense input voltage that is AC voltage. In such cases, magnitude refers to the absolute value of the amplitude of the AC input voltage. [0046] In an embodiment, the voltage regulation system 200 may include a feedback circuitry 231 that may be electrically coupled with the sensing circuitry 221 to receive the sensing signal. The feedback circuitry 231 may also be coupled with the boost circuitry to provide feedback signals to the boost circuitry. The feedback circuitry 231 may include capacitor C14 and optocoupler U3. The optocoupler U3 may be configured to move into either of cut off region, active region, and saturation region. The optocoupler U3 may be coupled to resistance R17 of boost circuitry as shown in FIG. 3. Based on the received sensing signal, the feedback circuitry 231 provides feedback signals to the boost circuitry through the resistance R17 such that the equivalent resistance at the output of the boost circuitry is modified. Thus, the feedback circuitry 231 controls duty cycle of the boost circuitry through the transmission of feedback signals to the boost circuitry to regulate the output voltage of the boost circuitry.
[0047] In an embodiment, the voltage regulation system 200 may include an output circuitry 241 electrically coupled to the boost circuitry. The output circuitry 241

may be configured to receive the output voltage of the boost circuitry. The output circuitry 241 may include but not limited to, a three-terminal adjustable precision shunt voltage regulator integrated circuit IC TL431, resistances R28, R29, R30, and R31, and so on. The load/equipment may be connected at the output terminals V+ and V- of the output terminals. The resistance R29, R30, R31 are configured at the output of the output circuitry.
[0048] In an embodiment, the voltage regulation system 200 may include a regulatory circuitry 251 configured with the sensing circuitry and the output circuitry. The regulatory circuitry 251 may be configured to receive the sensing signal from the sensing circuitry and regulate the output voltage of the output circuitry based on the sensed signal. In an embodiment, when the input voltage becomes less than the low cut off voltage or greater than the high voltage, the regulatory circuitry provides zero output voltage. In another embodiment, when the voltage lies between the low cut off voltage and the high cut off voltage, there is no impact of regulatory circuitry over the voltage. The regulatory circuitry 251 may include low cut-off resistance R23, high cut-off upper resistance R26, high cut-off lower resistance R27, transistor Q3, capacitor CI5, an optocoupler U4. The high cut-off voltage depends on resistances R26 and R27, whereas the low cut-off voltage depends on resistances R23 and R30. The optocoupler U4 and the transistor Q3 may be configured to move into either of cut off region, active region, and saturation region. The optocoupler U4 may be connected to R30 of the output circuitry. The regulatory circuitry may regulate the output voltage through coupling between the optocoupler U4 of the regulatory circuitry and the resistance R30 of the output circuitry. In an embodiment, the regulatory circuitry may be configured to adjust the equivalent resistance at the output of the output circuitry through the coupling between the resistance R30 of the output circuitry and optocoupler U4 of the regulatory circuitry, which allows the regulatory circuitry to regulate the output voltage of the output circuitry. Working
[0049] The working of the voltage regulation system can be understood for low voltage cut-off and high voltage cut-off separately, where the low voltage cut-off

refers to a minimum voltage at which the equipment to be connected with the
voltage regulation system can be operated safely; and the high voltage cut-off refers
to a maximum voltage at which the equipment to be connected with the voltage
regulation system can be operated safely. Based on the low cut-off voltage and high
cut-off voltage, the working of the proposed voltage regulation system can be
explained as follows:
[0050] For low cut-off voltage:
Rated voltage: voltage at which the equipment is designed to operate.
First threshold: a reference voltage value greater than the low cut-off voltage and
less than rated voltage.
[0051] Case 1: When the input voltage lies between the low cut-off and the first
threshold, and when the input voltage is increasing in nature:
In this case, components transistor Q3 and optocouplers U2, and U3 move into the active region from the cut-off region. As the optocoupler U3 moves into active region from the cut-off region, the feedback circuitry may be configured to reduce equivalent resistance i.e. resultant resistance of R5, R8, R17, and R18 at the output of the boost circuitry. Further, the regulatory circuitry is configured to reduce equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry.
[0052] Case 2: When the input voltage lies between the first threshold and rated voltage; and when the input voltage is increasing in nature:
In this case, the optocouplers U3 and U4 move in saturation mode. However, transistor Q3 remains in active mode by an appropriate selection of resistances R26 & R27 of the regulatory circuitry. Since optocouplers U3 and U4 enter into the saturation mode, which enables output of boost circuitry and output of the output circuitry to reach the set voltages.
[0053] Case 3: When the input voltage lies between the first threshold and rated voltage; and when the input voltage is decreasing in nature:
In this case, the optocoupler U2 moves into an active region. It enables transistor Q3, optocouplers U3 and U4 of the regulatory circuitry to enter in the active region from saturation region. As a result, the feedback circuitry reduces

equivalent resistance at the output of the boost circuitry and the regulatory circuitry reduces equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry linearly with the decrease in the output voltage. [0054] Case 4: When the input voltage lies between the first threshold and low cut-off voltage; and when the input voltage is decreasing in nature:
In this case, the optocoupler U2 moves into cut-off region and collector to emitter voltage of transistor Q3 becomes very high. It enables transistor Q3 of the regulatory circuitry, optocouplers U3 and U4 to enter in cut-off region from active region. The resistance R17 at the output of the boost circuitry and resistance R30 at the output of output circuitry get disconnected. As a result, the output voltage of the output circuitry becomes zero voltage and the low cut-off is realized. [0055] For high cut-off voltage:
Rated voltage: voltage at which the equipment is designed to operate. Second threshold: a reference voltage value less than the high cut-off voltage and greater than the rated voltage.
[0056] Case 1 : When the input voltage lies between higher cut off and second threshold; and when the input voltage is decreasing in nature:
In this case, the optocoupler U2 of the sensing circuitry moves in active region. The optocoupler U3 also moves into active region from cut-off region. As a result, the feedback circuitry and the regulatory circuitry reduce the equivalent resistance at the output of the boost circuitry and output of the output circuitry, respectively. Therefore, the output voltage increases.
[0057] Case 2 : When the input voltage lies between rated voltage and second threshold; and when the input voltage is decreasing in nature: In this case, optocoupler U2 remains in active region. It triggers the transistor Q3 to enter cut-off region and optocouplers U3 and U4 in saturation mode. Since U3 and U4 enter saturation mode, which enables output of boost circuitry and output of the output circuitry to reduce linearly with the input voltage. [0058] Case 3 : When the input voltage lies between rated voltage and second threshold; and when the input voltage is increasing in nature:

In this case, the optocoupler U2 of the sensing circuitry remains in active region. The transistor Q3 and optocouplers U3 and U4 enter into active region. As a result, the feedback circuitry may increase equivalent resistance at the output of the boost circuitry and the regulatory circuitry may reduce equivalent resistance at the output of the output circuitry, which enables the output voltage of the output circuitry to decrease.
[0059] Case 4 : When the input voltage lies between high cut-off threshold and second threshold; and when the input voltage is increasing in nature:
In this case, the optocoupler U2 of the sensing circuitry remains in the active region. The transistor Q3 moves into saturation region and optocouplers U3, U4 move in the cut-off region. The resistance R17 at the output of the boost circuitry and resistance R30 at the output of the output circuitry get disconnected, accordingly the output voltage of the output circuitry becomes zero voltage and the high cut-off is realized. In this manner, the feedback circuitry and the regulatory circuitry are configured to provide zero output voltage at the output circuitry. [0060] The present disclosure provides a voltage regulation system that utilizes cross regulation to avoid beating frequency by combining switching frequency of two different sections. In this manner, the voltage regulation system provides better stability and transient immunity, thereby achieving better MTBF. The proposed voltage regulation system with high-low cut-off topology has been successfully employed in high-power range of LED drivers and Digital SMPS. [0061] While embodiments of the present invention have been illustrated and described, it will be clear that the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the invention, as described in the claim.
[0062] While the foregoing describes various embodiments of the disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof. The disclosure is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill

in the art to make and use the disclosure when combined with information and knowledge available to the person having ordinary skill in the art.
ADVANTAGES OF THE INVENTION
[0063] The present disclosure provides a voltage regulation system that provides
smooth and steady cut-off in the electrical system.
[0064] The present disclosure provides a voltage regulation system that eliminates
unwanted transient or disturbance in line without increasing any other resources.
[0065] The present disclosure provides a voltage and current stability for smooth
operation of the equipment in the electrical system to avoid sudden cut off.
[0066] The present disclosure provides a voltage regulation system that is
independent of temperature.
[0067] The present disclosure provides a voltage regulation system that include a
boost circuitry that changes the output voltage based on the change in input line
voltage.
[0068] The present disclosure provides a voltage regulation system that provides
better transient immunity to achieve higher mean time between failure (MTBF).

We Claim:
1. A voltage regulation system comprising:
a boost circuitry configured to receive an input voltage and increase an amplitude of the input voltage;
a sensing circuitry configured with the boost circuitry and configure to sense the input voltage and generate a corresponding sensing signal;
a feedback circuitry electrically coupled with the sensing circuitry to receive the sensing signal and configured with the boost circuitry to control duty cycle of the boost circuitry to regulate the output voltage of the boost circuitry;
an output circuitry electrically coupled to the boost circuitry and configured to receive the output voltage of the boost circuitry; and
a regulatory circuitry configured with the sensing circuitry and the output circuitry, wherein the regulatory circuitry configured to regulate the output voltage of the output circuitry.
2. The voltage regulator as claimed in claim 1, wherein the regulatory
circuitry is configured to regulate the output voltage of the output circuitry
between a low cut-off voltage and a high cut-off voltage.
3. The voltage regulator as claimed in claim 1, wherein the feedback circuitry is configured to increase or decrease resistance at the output of the boost circuitry to regulate the output voltage of the boost circuitry.
4. The voltage regulator as claimed in claim 1, wherein the sensing signal is generated when the input voltage is greater than a low cut-off voltage.
5. The voltage regulator as claimed in claim 1, wherein the sensing circuitry is configured to sense the input voltage by detecting magnitude of the input voltage and characteristics of the input voltage, and wherein the characteristics of the input voltage indicate whether the input voltage is increasing or decreasing in nature.

6. The voltage regulator as claimed in claim 2, wherein when the input voltage lies between a low cut-off voltage and a first threshold voltage, and the input voltage is increasing in nature, the feedback circuitry is configured to reduce equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to reduce equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry, and wherein the first threshold is greater than the low cut-off voltage and less than rated voltage.
7. The voltage regulator as claimed in claim 2, wherein when the input voltage lies between a rated voltage and a first threshold voltage, and the input voltage is decreasing in nature, the feedback circuitry is configured to reduce equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to reduce equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry, and wherein the first threshold is greater than the low cut-off voltage and less than the rated voltage.
8. The voltage regulator as claimed in claim 2, wherein when the input voltage lies between the high cut-off voltage and a second threshold voltage, and the input voltage is decreasing in nature, the feedback circuitry is configured to reduce equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to reduce equivalent resistance at the output of the output circuitry to increase the output voltage at the output circuitry, and wherein the second threshold is less than the high cut-off voltage and greater than rated voltage.
9. The voltage regulator as claimed in claim 2, wherein when the input voltage lies between rated voltage and a second threshold voltage, and the input voltage is increasing in nature, the feedback circuitry is configured to increase equivalent resistance at the output of the boost circuitry and the regulatory circuitry is configured to increase equivalent resistance at the output of the output circuitry, to decrease the output voltage at the output circuitry, and wherein the second threshold is less than the high cut-off voltage and greater than the rated voltage.
10. The voltage regulator as claimed in claim 2, wherein when the input voltage lies between the high cut-off voltage and a second threshold voltage, and the input voltage is increasing in nature, the feedback circuitry and the regulatory circuitry are configured to provide zero output voltage at the output circuitry, and wherein the second threshold is less than an high cut¬off voltage and greater than rated voltage.