Solid state autotune power amplifier
US4422047A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1981 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Nov 23, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A solid state, band-pass filtered, RF power amplifier for equalizing the response of an amplified RF signal across the entire tuning range of a multi channel transmitter is disclosed. An RF signal is applied to the input of a low noise FET amplifier with a portion of the signal coupled off into a frequency counter which in conjunction with a digital switching logic selects a path through a band-pass filter having characteristics that reduce the broadband noise of the RF signal passed therethrough. Additionally, a dual directional coupler samples the output of the power amplifier with the forward sampled signal being used to control the amplifier output to a preselected level and the reverse sampled signal being used to reduce the amplifier output signal in proportion to an increase in the voltage standing wave ratio load between the amplifier and the transmit/receive switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.