Compensated ring mixers

Details Compensated ring mixers Compensated ring mixers

1995-04-11

1998-12-29

Vo, Nguyen

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455326, H04B 126

Patent

active

058549749

ABSTRACT:
A compensated mixer including a radio frequency (RF) balun through which RF signals are transferred, and a local oscillator (LO) balun for receiving an LO signal. In an exemplary implementation the mixer further includes a diode ring quad circuit for mixing RF signals received by the RF balun with the LO signal received by the LO balun. During operation the diode ring quad circuit develops, between first and second nodes therein, a capacitive reactance arising from switching at the LO frequency. The mixer further includes a compensation inductor, connected between the first and second nodes, for cancelling the effect of the capacitive reactance at the LO signal frequency.

REFERENCES:
patent: 4063176 (1977-12-01), Milligan et al.
patent: 5140705 (1992-08-01), Kosuga
patent: 5265269 (1993-11-01), Staudinger et al.
RF and Microwave Designer's Handbook, Watkins-Johnson Co., 1993-1994, pp. 504-510, 766-776.

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