Monolithic double balanced single sideband modulator

Details Monolithic double balanced single sideband modulator Monolithic double balanced single sideband modulator

1987-04-13

1988-08-30

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 45, 307529, H03C 142, H03C 160

Patent

active

047680008

ABSTRACT:
A modulator comprising two differential FET pairs, each pair having a current generator feeding the source electrodes thereof, a voltage source being coupled between the drain electrodes of each pair and the current generator. A low frequency signal is applied to one of the gate electrodes of each pair, ninety degrees out of phase with each other and a high frequency signal is applied to the other of the gate electrodes of each pair, ninety degrees out of phase with each other. The result is that all of the generated frequencies except one side band is cancelled at the drain electrodes of the pairs. The particular side band recovered is determined by the direction of the ninety degree phase shift between the signals.

REFERENCES:
patent: 4590433 (1986-05-01), Kusakabe

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