JPS57113606A - Isolation amplifying circuit - Google Patents
Isolation amplifying circuitInfo
- Publication number
- JPS57113606A JPS57113606A JP55187416A JP18741680A JPS57113606A JP S57113606 A JPS57113606 A JP S57113606A JP 55187416 A JP55187416 A JP 55187416A JP 18741680 A JP18741680 A JP 18741680A JP S57113606 A JPS57113606 A JP S57113606A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- output
- sws
- given
- sampling period
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Amplifiers (AREA)
Abstract
PURPOSE: To use a magnetic core and a circuit with low cost through increased conversion accuracy, by setting the sampling period including the phase so that the energizing currnt is zero, in an isolation amplifying circuit used for signal transmission of an instrument control device.
CONSTITUTION: An input DC voltage applied at terminals T1, T2 is applied to the primary winding of an isolation transformer TF1 via an amplifier A11 and analog switches (SW)11, 12. On the other hand, a rectangular wave output of an oscillator OSC is given to the amplifier A11 via diodes (D) 1∼4 to switch the SWs 11, 12 alternately and to produce alternating magnetic flux. The output is given to terminals T3, T4 via SWs 15, 16 and an amplifier 12. The output of the oscillator OSC switches the SWs 15, 16 via sampling period set circuits STa, STb and is given to an amplifier 20 via D5∼8. The said sampling period is set including the phase where the energizing current of a transformer TF1 is zero, and the obtained signal is stored in a capacitor C6, allowing to make input and output voltages equal.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55187416A JPS57113606A (en) | 1980-12-30 | 1980-12-30 | Isolation amplifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55187416A JPS57113606A (en) | 1980-12-30 | 1980-12-30 | Isolation amplifying circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57113606A true JPS57113606A (en) | 1982-07-15 |
Family
ID=16205653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55187416A Pending JPS57113606A (en) | 1980-12-30 | 1980-12-30 | Isolation amplifying circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57113606A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61218210A (en) * | 1985-03-25 | 1986-09-27 | Stanley Electric Co Ltd | Isolate amplifier |
| EP0652639A2 (en) * | 1993-11-08 | 1995-05-10 | GRÜNDL UND HOFFMANN GmbH GESELLSCHAFT FÜR ELEKTROTECHNISCHE ENTWICKLUNGEN | Driver circuit |
| DE19949389C1 (en) * | 1999-10-13 | 2001-02-01 | Gruendl & Hoffmann | Control circuit for MOSFET or insulated-gate bipolar transistor power end stage has power driver stage controlled by input stage with current sinks and associated current detectors |
-
1980
- 1980-12-30 JP JP55187416A patent/JPS57113606A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61218210A (en) * | 1985-03-25 | 1986-09-27 | Stanley Electric Co Ltd | Isolate amplifier |
| EP0652639A2 (en) * | 1993-11-08 | 1995-05-10 | GRÜNDL UND HOFFMANN GmbH GESELLSCHAFT FÜR ELEKTROTECHNISCHE ENTWICKLUNGEN | Driver circuit |
| EP0652639A3 (en) * | 1993-11-08 | 1996-05-15 | Gruendl & Hoffmann | Driver circuit. |
| US5563536A (en) * | 1993-11-08 | 1996-10-08 | Gruendl & Hoffmann | Driver circuit having low voltage detection and high current detection |
| DE19949389C1 (en) * | 1999-10-13 | 2001-02-01 | Gruendl & Hoffmann | Control circuit for MOSFET or insulated-gate bipolar transistor power end stage has power driver stage controlled by input stage with current sinks and associated current detectors |
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