Switching circuits for differential amplifiers

Details Switching circuits for differential amplifiers Switching circuits for differential amplifiers

1979-11-01

1981-08-18

Mullins, James B.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

330 51, 330254, H03K 1760

Patent

active

042849128

ABSTRACT:
In a differential amplifier comprising first and second transistors of one conductivity type and having emitter electrodes commonly connected, a switching circuit is provided which includes third and fourth transistors of the opposite conductivity type. A switching signal is applied to the base electrodes of the third and fourth transistors, the emitter electrodes thereof are connected to the collector electrodes of the first and second transistors, and the collector electrodes of the third and fourth transistors are connected to the commonly connected emitter electrodes of the first and second transistors. A fifth transistor acting as a constant current source is connected to the commonly connected emitter electrodes of the first and second transistors. In a modified embodiment a sixth transistor is connected in parallel with the fifth transistor to prevent saturation of the third and fourth transistors acting as the switching transistors.

REFERENCES:
patent: 3737797 (1973-06-01), Amemiya

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