Transmission circuit with improved gain control loop
US5659893A · kind A · utility
19Cited by
9References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3042
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a transmission circuit, part of the output signal of the transmission circuit is diverted by an output monitor circuit and subjected to envelope detection by an output detector circuit. The output signal of the output detector circuit is inputted to a peak hold circuit successively holding the peaks of the input signal, so that varying amplitude components are removed, and a DC value is detected. An error detector circuit compares the detected value with a reference signal from a reference signal generator circuit, and the error signal is used as a gain control signal to control the gain of a power amplifier circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.