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Ac Current Sensing Circuit With Optical Isolation And Pulse Output
Abstract: ABSTRACT ANNEXURE - III Refer Fig 1 This is AC current sensing circuit with optical isolation and Pulse output.AC load current flows through the terminal (A) and (B). The output pulse proportional to the input AC frequency is obtained at terminal (C). The Rshunt (3) is selected so that when the required load current flow the voltage drop across is more that the opto isolator"s diodes forward current. Rlimit(2) is to limit the current to the opto isolator"s diode. The isolated ground of load current load is terminal ©. AC current sensing circuit with optical isolation and Pulse output
Notices, Deadlines & Correspondence
Patent Information
Applicants
HINDUSTAN AERONAUTICS LTD.
Inventors
1. SUNIL K VALSAN
Specification
SPECIFICATION OF THE INVENTION
The circuit consists of opto-isolator (1) with current limiting resistor (2) parallel with shunt resistor (3) and a reverse diode (4). The external diode (4) revrese break down voltage should have safe voltage margin over the AC peak voltage to be measured. The load current will be carried by the shunt resistor path and will be selected such that it will have more than the opto diode forward voltage developed across it when the required current flows through the shunt. The out put of the opto can be pulled upto to 5V to give TTL pulse out when the load current is flowing. The components (1),(2) and (4) can be replaced with a bidirectional opto isolator and a current limiter.
CLAIMS
We claim that
1. This circuit can be used for AC load On/Off detect by checking the pulse signal out put.
2. This circuit can be sued for measuring the AC frequency.
3. This circuit can detect AC load On/Off with opto isolation
4. This circuit can be interfaced directly with TTL circuits or PCs to detect AC load On/Off
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 1945-CHE-2013 FORM-5 01-05-2013.pdf | 2013-05-01 |
| 1 | 1945-CHE-2013-IntimationOfGrant16-11-2023.pdf | 2023-11-16 |
| 2 | 1945-CHE-2013 FORM-3 01-05-2013.pdf | 2013-05-01 |
| 2 | 1945-CHE-2013-PatentCertificate16-11-2023.pdf | 2023-11-16 |
| 3 | 1945-CHE-2013-Abstract-261023.pdf | 2023-10-31 |
| 3 | 1945-CHE-2013 FORM-2 01-05-2013.pdf | 2013-05-01 |
| 4 | 1945-CHE-2013-Amended Pages Of Specification-261023.pdf | 2023-10-31 |
| 4 | 1945-CHE-2013 FORM-1 01-05-2013.pdf | 2013-05-01 |
| 5 | 1945-CHE-2013-Claims-261023.pdf | 2023-10-31 |
| 5 | 1945-CHE-2013 DESCRIPTION (COMPLETE) 01-05-2013.pdf | 2013-05-01 |
| 6 | 1945-CHE-2013-Correspondence-261023.pdf | 2023-10-31 |
| 6 | 1945-CHE-2013 CLAIMS 01-05-2013.pdf | 2013-05-01 |
| 7 | 1945-CHE-2013-Drawing-261023.pdf | 2023-10-31 |
| 7 | 1945-CHE-2013 ABSTRACT 01-05-2013.pdf | 2013-05-01 |
| 8 | 1945-CHE-2013-Form 2(Title Page)-261023.pdf | 2023-10-31 |
| 8 | 1945-CHE-2013 FORM-18 17-07-2014.pdf | 2014-07-17 |
| 9 | 1945-CHE-2013-Form 3-261023.pdf | 2023-10-31 |
| 9 | abstract-1945-chenp-2013.jpg | 2014-12-17 |
| 10 | 1945-CHE-2013-FER.pdf | 2018-12-04 |
| 10 | 1945-CHE-2013-OTHERS-261023.pdf | 2023-10-31 |
| 11 | 1945-CHE-2013-Correspondence-131023.pdf | 2023-10-23 |
| 11 | Marked Copy_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 12 | 1945-CHE-2013-OTHERS-131023.pdf | 2023-10-23 |
| 12 | Correspondence by Applicant_Reply to Examination Report_31-05-2019.pdf | 2019-05-31 |
| 13 | 1945-che-2013-Annexure [18-10-2023(online)].pdf | 2023-10-18 |
| 13 | Claims_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 14 | 1945-che-2013-Written submissions and relevant documents [18-10-2023(online)].pdf | 2023-10-18 |
| 14 | Amended Pages OF Specification_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 15 | 1945-CHE-2013-US(14)-HearingNotice-(HearingDate-10-10-2023).pdf | 2023-09-11 |
| 15 | Abstract_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 16 | 1945-CHE-2013-US(14)-HearingNotice-(HearingDate-10-10-2023).pdf | 2023-09-11 |
| 16 | Abstract_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 17 | Amended Pages OF Specification_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 17 | 1945-che-2013-Written submissions and relevant documents [18-10-2023(online)].pdf | 2023-10-18 |
| 18 | 1945-che-2013-Annexure [18-10-2023(online)].pdf | 2023-10-18 |
| 18 | Claims_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 19 | 1945-CHE-2013-OTHERS-131023.pdf | 2023-10-23 |
| 19 | Correspondence by Applicant_Reply to Examination Report_31-05-2019.pdf | 2019-05-31 |
| 20 | 1945-CHE-2013-Correspondence-131023.pdf | 2023-10-23 |
| 20 | Marked Copy_FER Reply_31-05-2019.pdf | 2019-05-31 |
| 21 | 1945-CHE-2013-FER.pdf | 2018-12-04 |
| 21 | 1945-CHE-2013-OTHERS-261023.pdf | 2023-10-31 |
| 22 | 1945-CHE-2013-Form 3-261023.pdf | 2023-10-31 |
| 22 | abstract-1945-chenp-2013.jpg | 2014-12-17 |
| 23 | 1945-CHE-2013 FORM-18 17-07-2014.pdf | 2014-07-17 |
| 23 | 1945-CHE-2013-Form 2(Title Page)-261023.pdf | 2023-10-31 |
| 24 | 1945-CHE-2013-Drawing-261023.pdf | 2023-10-31 |
| 24 | 1945-CHE-2013 ABSTRACT 01-05-2013.pdf | 2013-05-01 |
| 25 | 1945-CHE-2013-Correspondence-261023.pdf | 2023-10-31 |
| 25 | 1945-CHE-2013 CLAIMS 01-05-2013.pdf | 2013-05-01 |
| 26 | 1945-CHE-2013-Claims-261023.pdf | 2023-10-31 |
| 26 | 1945-CHE-2013 DESCRIPTION (COMPLETE) 01-05-2013.pdf | 2013-05-01 |
| 27 | 1945-CHE-2013-Amended Pages Of Specification-261023.pdf | 2023-10-31 |
| 27 | 1945-CHE-2013 FORM-1 01-05-2013.pdf | 2013-05-01 |
| 28 | 1945-CHE-2013-Abstract-261023.pdf | 2023-10-31 |
| 28 | 1945-CHE-2013 FORM-2 01-05-2013.pdf | 2013-05-01 |
| 29 | 1945-CHE-2013-PatentCertificate16-11-2023.pdf | 2023-11-16 |
| 29 | 1945-CHE-2013 FORM-3 01-05-2013.pdf | 2013-05-01 |
| 30 | 1945-CHE-2013-IntimationOfGrant16-11-2023.pdf | 2023-11-16 |
| 30 | 1945-CHE-2013 FORM-5 01-05-2013.pdf | 2013-05-01 |
Search Strategy
| 1 | Searchstrategy_30-11-2018.pdf |