Amplifier device
US4121169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1977 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Jan 13, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/21
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier device comprises a pair of cascode connected transistors wherein the base of the first transistor is connected to an input terminal, the emitter is grounded through a resistor, the collector is connected to the emitter of the second transistor, the collector of the second transistor is connected to a source through a resistor and to an output terminal, and the base of the second transistor is connected to the emitter of the first transistor via a biasing circuitry. The voltage drop between the collector and the emitter of the first transistor is kept constant irrespective of the input signal voltage. The amplifier operates stably with a small deformation of the waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.