Electronic switchover circuit

Details Electronic switchover circuit Electronic switchover circuit

1978-11-28

1981-03-17

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307243, 328163, H03K 1716, H03K 1762

Patent

active

042569800

ABSTRACT:
There is disclosed an electronic switchover circuit which can eliminate noises caused when two or more input signals are electronically selected to deliver out one of these input signals. A plurality of differential amplifier sets each having first and second transistors of which the first transistor receives the input signal are provided for the circuit, and a control voltage is applied to the control terminal of a constant current source to enable only one of the plurality of differential amplifier sets to thereby deliver out the input signal applied to the one differential amplifier set while disabling the remaining differential amplifier set. The base of the first transistor of the respective differential amplifier sets is connected with a third transistor which operates in the opposite phase relationship to the associated differential amplifier set, whereby base potentials of the first transistors of the differential amplifier sets which are disabled can be kept constant.

REFERENCES:
patent: 3783307 (1974-01-01), Breuner
patent: 3877023 (1975-04-01), Spicer et al.
patent: 4037118 (1977-07-01), Sieborger et al.

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