Automatic gain control method and device for receiving circuits
US5617240A · kind A · utility
12Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Oct 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for automatic gain control in a receiver. The input signal to the receiver includes both a DC component and a signal component. Filters are used to separate the two components. The DC component modulates a pilot signal and is then added to the signal component. The combined signal is then amplified to produce an output signal. The output is also filtered and subjected to a synchronous detector to produce a gain control level for the amplifier. The synchronous detector utilizes the filtered output signal to modulate the same pilot signal which is then compared to a reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.