HF mixer stage having a common base circuit

Details HF mixer stage having a common base circuit HF mixer stage having a common base circuit

1993-02-08

1995-04-25

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455323, 327113, H04B 116

Patent

active

054107440

ABSTRACT:
An HF mixer stage having a common base circuit comprises an amplifier stage having two amplifier transistors, a switching stage with two transistor pairs each having two emitter-coupled switching transistors, and a switching circuit connected to the switching transistors; the switching transistors of a transistor pair are connected to the collector of the associated amplifier transistor, the bases of the switching transistors are subjected to a heterodyne signal. In accordance with the invention, the two amplifier transistors are of the opposite conductivity type, the emitters of the amplifier transistors are connected to the circuit input, and the two switching transistors of a transistor pair are of the same conductivity type as the associated amplifier transistors.

REFERENCES:
patent: 4080573 (1978-03-01), Howell
patent: 4310810 (1982-01-01), Toyomura et al.
patent: 4461042 (1984-07-01), Tanabe et al.
patent: 4636663 (1987-01-01), Jongepier et al.
patent: 4667342 (1987-05-01), Lindenmeier et al.
patent: 4931746 (1990-06-01), Trankle et al.

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