Amplitude modulator having substantially zero modulation distort

Details Amplitude modulator having substantially zero modulation distort Amplitude modulator having substantially zero modulation distort

1983-03-28

1984-11-27

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 37D, H03C 144

Patent

active

044853599

ABSTRACT:
An improved substantially "zero distortion" four quadrant modulator of the type including a pair of differential elements respectively coupled to the Y input port terminals of the modulator and exhibiting nonlinear amplitude transfer functions, includes the means for substantially linearizing the nonlinear transfer function. The means includes a pair of operational amplifiers, each having an input coupled to a respective terminal of the Y input port and an output coupled to the corresponding differential element so that the differential element is disposed in the feedback path of the operational amplifier.

REFERENCES:
patent: 3866148 (1975-02-01), Lisle, Jr. et al.
patent: 3974460 (1976-08-01), Hongu et al.
Blesser, "Ultralinear Transistor Configuration Under Conditions of Minimal Power-Supply Drain Current", IEEE Journal of Solid-State Circuits, vol. SC-5, No. 3, Jun. 1970, pp. 125-126.
Analog Devices, Inc., Nonlinear Circuits Handbook, 1974, pp. 222-223.

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