Control circuitry for an RF signal amplifier
US5291150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Jul 22, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3042
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Control circuitry for maintaining the magnitude of an RF signal from an RF signal amplifier at a predetermined level includes a detector which is supplied with a signal indicative of the power level of the output from the amplifier and outputs a signal which is dependant upon the input signal. A detector (100) is provided with a negative feedback loop (200) which supplies a biasing voltage Vb to the input of the detector, whereby the biasing voltage Vb decreases if the magnitude of the signal (P) input and hence the output signal (Vr), increases, thus serving to decrease the output voltage (Vr), and vice versa. This has the advantage of increasing the dynamic range of the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.