Low noise ultra high frequency amplifier having automatic gain control
US4754233A · kind A · utility
22Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Jun 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3052
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio frequency amplifier includes a bipolar and a field effect transistors (FET) which are cascoded for efficient operation and simultaneous gain control. Bias circuitry is connected to the control electrode of the FET to stabilize the output bias thereof. Negative feedback circuitry is connected between the output electrode of the FET and the control electrode of the bipolar transistor to stabilize the other bias levels within the circuitry. An AGC circuit is connected to the feedback circuitry to provide an automatic gain control function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.