Automatic gain control system
US5134722A · kind A · utility
Inventors
Key dates
| Filing date | Jun 22, 1990 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jun 22, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3036
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic gain control system handles inphase and quadrature phase signals, and is for use in digital cellular radio receiver equipment. The system comprises an inphase signal path and a quadrature phase signal path, each path including a logarithmic attenuator, the inphase and quadrature phase signal paths each including a feedforward path including a logarithmic detector. The output of the detectors are compared by respective comparators with an analogue signal, and output signals from the comparators are arranged to control a counter arrangement which generates a data word which is used to control the performance of the logarithmic attenuators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.