Transistor amplifier circuit

Details Transistor amplifier circuit Transistor amplifier circuit

1976-01-16

1977-09-06

Rolinec, Rudolph V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 19, 330 30D, 330 40, H03F 304

Patent

active

040471187

ABSTRACT:
In a transistor amplifier circuit comprising a common-emitter amplifier transistor, a collector load resistance has one end connected with the collector of the transistor, a constant-current circuit is connected with the collector of the transistor, and an output of the transistor amplifier circuit is derived from the collector. The constant-current circuit supplies a constant current which is substantially equal to the d.c. emitter current flowing through the transistor and a d.c. voltage which establishes a d.c. voltage level of the output is applied to the other end of the collector load resistance, whereby no d.c. current is permitted to flow through the resistance.

REFERENCES:
patent: 3444476 (1969-05-01), Leidich
patent: 3564439 (1971-02-01), Rao
patent: 3676789 (1972-07-01), Bray

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