Transistor mixer and amplifier input stage
US4480337A · kind A · utility
18Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1982 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Sep 10, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transistor mixer and amplifier input stage which includes a mixer and a differential amplifier whose gain is controlled by a voltage generated by an AGC circuit. Two transistors, each having a resistor connected in series with its emitter, are connected between the inputs of the differential amplifier and the mixer. When the level of the input signal increases beyond a given level, the two transistors begin to conduct, thereby shunting the differential amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.