MOS analog multiplier

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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Details

307221, 307179, 307303, 307304, 330 35, H03B 1700

Patent

active

039566439

ABSTRACT:
A four quadrant multiplier in which a semiconductor chip has a pair of MOSFET differential amplifiers formed with MOSFET current sources for both amplifiers. Currents through the differential amplifiers are modulated 180.degree. out of phase in response to first multiplier input voltages. Currents through one FET of each said amplifier and a second FET of each said amplifier are modulated in response to second multiplier input voltages 180.degree. out of phase.
Active MOSFETs form a load connected to the drains of the first FET of both amplifiers while other active MOSFETs form a load connected to the drain of the second FET of both amplifiers to produce a product voltage across at least one of the load FETs.

REFERENCES:
patent: 3614411 (1971-10-01), Henderson
patent: 3753009 (1973-08-01), Clapper
patent: 3870966 (1975-03-01), Dingwall

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