Transistor amplifier stage

Details Transistor amplifier stage Transistor amplifier stage

1998-07-28

1999-11-16

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including d.c. feedback bias control for stabilization

330296, H03F 130, H03F 304

Patent

active

059865091

ABSTRACT:
A transistor amplifier stage, in particular an RF amplifier stage with an npn amplifier transistor, which is coupled with its base to an alternating voltage input terminal, with its emitter to a fixed potential, and with its collector to an alternating voltage output terminal. An active operating point stabilization unit with a first and a second pnp transistor is provided between a direct voltage input terminal and the base of the npn amplifier transistor.

REFERENCES:
patent: 4237414 (1980-12-01), Stein
patent: 5404585 (1995-04-01), Vimpari et al.
Patent Abstracts of Japan, Publication No. 520600476, Published May 18, 1977, Ito Mitsutoshi, "Bias Current Supply Circiut" .
"Investigation of the Temperature Stability of a Broadband Microwave Amplifier-Limiter", A.V. Baranov et al., Telecommunications and Radio Engineering, Jul. 1988, No. 7, New York, pp. 148-150.

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