Radio frequency mixer circuit utilizing interface transformers a

Details Radio frequency mixer circuit utilizing interface transformers a Radio frequency mixer circuit utilizing interface transformers a

1989-09-29

1991-10-22

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455330, 455332, H04B 126

Patent

active

050602993

ABSTRACT:
A diode mixer characterized by low levels of intermodulation distortion. The mixer circuit includes a center-tapped input transformer for coupling the circuit to local oscillator and radio frequency signal sources and a center-tapped output transformer for coupling the circuit to an intermediate frequency load. The circuit also includes an arrangement of transformers and switching diodes for interfacing the input transformer to the output transformer and applying the local signals and radio frequency signals to the secondary output transformer in a special manner while favorably back-biasing diodes which are in the off condition for more rapid switching action.

REFERENCES:
patent: 2898462 (1959-08-01), Karlson
patent: 2941093 (1960-06-01), Merel
patent: 3038762 (1962-06-01), Beatrice
patent: 3727078 (1973-04-01), Wollesen
patent: 3797384 (1957-06-01), Brown
patent: 4317230 (1982-02-01), Boubouleix
patent: 4467442 (1984-08-01), Ramer
patent: 4601063 (1986-07-01), Price

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