Transistor direct-coupled amplifier

Details Transistor direct-coupled amplifier Transistor direct-coupled amplifier

1992-04-09

1993-06-08

Motiola, Steven

Amplifiers

With semiconductor amplifying device

Including d.c. feedback bias control for stabilization

330311, H03F 130

Patent

active

052183238

ABSTRACT:
A transistor direct-coupled amplifier includes a positive-phase direct-coupled amplifier circuit, a second transistor, and a low-pass filter. The positive-phase direct-coupled amplifier circuit uses a base of a first transistor as an input terminal. The second transistor has a collector connected to the input terminal of the positive-phase direct-coupled amplifier circuit and an emitter connected to a reference voltage source, and the second transistor is complementary with the first transistor. A low-pass filter receives an output from the positive-phase direct-coupled amplifier circuit as an input, and the low-pass filter is connected to feed back an output to a base of the second transistor.

REFERENCES:
patent: 3452281 (1969-06-01), Weischedel
patent: 3729588 (1973-04-01), Berland
patent: 3899742 (1975-08-01), Yum et al.
patent: 4511857 (1985-04-01), Gunderson

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