High-frequency differential amplifier stage and amplifier compri

Details High-frequency differential amplifier stage and amplifier compri High-frequency differential amplifier stage and amplifier compri

1986-12-22

1988-09-06

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330259, H03F 345

Patent

active

047696168

ABSTRACT:
A high-frequency differential-amplifier stage. The collectors of the transistors (T.sub.1, T.sub.2) are connected to the emitters of two transistors (T.sub.3, T.sub.4) coupled to provide feedback between their collectors and their bases and which are biased by means of resistors (R.sub.1, R.sub.2). This input stage forms a resonant circuit. Two current sources (R.sub.32, T.sub.32, R.sub.31, T.sub.31) improve the operation of this stage in the saturated mode.

REFERENCES:
patent: 3660773 (1972-05-01), Free
patent: 4418321 (1983-11-01), Bohme

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