Automatic-gain control circuit
US7567127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Apr 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/023
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic-gain control circuit includes a variable-gain amplifier, a peak-detecting circuit, and an adjustable charge/discharge circuit. The variable-gain amplifier receives an input signal and adjusts the input signal based on a gain-factor control signal for generating a corresponding output signal. The peak-detecting circuit is coupled to the variable-gain amplifier for generating a comparing signal according to a reference signal and the output signal. The adjustable charge/discharge circuit is coupled to the peak-detecting circuit and the variable-gain amplifier for outputting a charge current or a discharge current based on the comparing signal, thereby generating the gain-factor control signal. The ratio between the charge current and the discharge current is adjustable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.