Direct-coupled active balanced mixer

Details Direct-coupled active balanced mixer Direct-coupled active balanced mixer

1995-07-11

1997-10-14

Pham, Chi H.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455326, 455333, H04B 116

Patent

active

056782250

ABSTRACT:
A low power, high-performance mixer includes a Schottky diode ring and first and second active baluns. The first active balun has an input coupled to a radio frequency (RF) signal and generates a first intermediate frequency (IF) output and a set of balanced RF outputs which are directly coupled to the Schottky diode ring. A second active balun has an input coupled to a local oscillator (LO) signal and generates a second IF output and a set of balanced LO outputs which are directly coupled to the diode ring. An IF output combiner, coupled to the first and second IF outputs, generates a combined IF output from the first and second IF outputs. The mixer can alternately be implemented using first and second distributed active baluns which are directly coupled to the diode ring.

REFERENCES:
patent: 4603435 (1986-07-01), Butler
patent: 4637069 (1987-01-01), Charbonnier
patent: 4896374 (1990-01-01), Waugh et al.
patent: 4994755 (1991-02-01), Titus et al.
patent: 5060298 (1991-10-01), Waugh et al.
patent: 5175885 (1992-12-01), Lange et al.

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