Linear frequency converter with gain independent of circuit para

Details Linear frequency converter with gain independent of circuit para Linear frequency converter with gain independent of circuit para

1974-05-02

1976-06-01

Safourek, Benedict V.

321 60, H04B 128

Patent

active

039612643

ABSTRACT:
A frequency converter circuit includes an input voltage-to-current converter which delivers signal current to a tuned IF circuit via a current steering circuit controlled by a local oscillator. In a preferred embodiment voltage-to-current conversion is effected without introducing unwanted harmonics by a double-gate MOSFET. Current steering is performed by a pair of push-pull connected transistors alternately driven into saturation by the local oscillator so that they alternately deliver signal current to the tank circuit in opposite senses. A current-limited diode clamps the output signal level in response to high input current levels to prevent over-driving an output filter.

REFERENCES:
patent: 3581222 (1971-05-01), Dunwoodie
patent: 3628154 (1971-12-01), Weill
patent: 3646458 (1972-02-01), Verhoeven et al.
patent: 3863136 (1975-01-01), Hanson

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