Self-pulsed microwave power amplifier
US4268797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Mar 28, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/408
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pulsed microwave power amplifier for radar transmitters having a class B operated first stage field effect amplifying transistor, which is gate biased to pinch-off in the absence of an input pulse is disclosed. The drain current pulse induced in response to the input RF signal appears as a voltage, which is stepped up through a Ruthroff transformer to turn on a bipolar transistor which switches a gate of a second stage field effect transistor from pinch-off voltage to a voltage corresponding to the drain current substantially equalling 1/2 I.sub.DSS to operate class A for the second stage of amplification. A third stage of amplification may be utilized, wherein its field effect transistor, which is also biased to pinch-off is operated in response to the amplified signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.