Demodulator circuit for chopper amplifier
US4188586A · kind A · utility
25Cited by
3References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1978 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Aug 8, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/261
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a demodulator circuit for a chopper amplifier including a rectifier and a smoothing filter having a capacitor, an impedance conversion circuit is connected to the output side terminal of the capacitor to ensure holding of the stored charges of the capacitor at each negative half-cycle of the amplitude-modulated AC signal applied to the demodulator circuit. A discharge circuit including a switching element is further provided for the capacitor and the discharge circuit is rendered conductive at each positive half-cycle of the amplitude-modulated AC signal which is also applied to a control terminal of the switching element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.