HF mixing stage in the form of a common-base circuit

Details HF mixing stage in the form of a common-base circuit HF mixing stage in the form of a common-base circuit

1994-06-07

1996-12-10

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455326, 327359, H04B 128

Patent

active

055840698

ABSTRACT:
HF mixing stage in the form of a common-base circuit including: two bipolar amplifying transistors; two switching stages each assigned to an amplifying transistor and each having two emitter-coupled bipolar switching transistors and with two signal sources which supply the bases of the switching transistors with superimposed signals; two nodes at which the emitters of the switching transistors are connected to the collector of the associated amplifying transistor; two further output nodes at which the collectors of each of two switching transistors in different switching stages are connected together; circuit elements for electrical isolation through which the emitters of the amplifying transistors are connected together; an input signal source with associated internal resistor of which the one terminal is connected via the circuit input to the circuit elements for electrical isolation and the other terminal is connected to reference potential and whose signal is to be transposed into another frequency range through the mixing stage; and wherein: the two bipolar amplifying transistors are of different conduction type, and the two switching transistors of a respective switching stage are of the same conduction type as the associated bipolar amplifying transistor.

REFERENCES:
patent: 4080573 (1978-03-01), Howell
patent: 4310810 (1982-01-01), Toyomura et al.
patent: 4636663 (1987-01-01), Jongepier et al.
patent: 4667342 (1987-05-01), Lindenmeier et al.
patent: 5329189 (1994-07-01), Ushida et al.
patent: 5379457 (1995-01-01), Nguyen
patent: 5410744 (1995-04-01), Rinderle et al.

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