Fast automatic gain control circuit with adjustable range
US3995224A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Apr 30, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic gain control circuit has its a-c signal input terminal connected directly to the numerator input of an analog divider, and connected through a peak detector to the denominator input of the analog divider. The quotient terminal of the analog divider provides a gain-controlled a-c signal output. The AGC circuit produces a constant amplitude output signal so long as the amplitude of the input signal exceeds an adjustable reference voltage applied to the peak detector. The reference voltage may be changed to change the range of input voltages resulting in a constant-amplitude output. The AGC circuit responds almost instantly to control a sudden increase in input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.