Analog switch circuit and signal attenuator employing an analog

Details Analog switch circuit and signal attenuator employing an analog Analog switch circuit and signal attenuator employing an analog

1983-09-09

1986-09-09

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307243, 307585, 333 81R, H03K 1716, H03K 17687

Patent

active

046111352

ABSTRACT:
An analog switch circuit comprises a first transfer gate (20) and a second transfer gate (23). The first transfer gate comprise first P-type and N-type field-effect transistors (21) and (22) having first electrodes thereof commonly connected through an output terminal (5) to a load (6) and second electrodes thereof commonly connected through an input terminal (4) to an input signal source (7) of an impedance lower than that of the load. The second transfer gate comprises second P-type and N-type field-effect transistors (24) and (25) of a gate size smaller than that of the respective transistors constituting the first transfer gate having the first and second electrodes connected in parallel with the first and second electrodes of the first P-type and N-type transistors, respectively. The second transfer gate is first turned on and then the first transfer gate is turned on, whereby a switching noise on the occasion of turning on of the first transfer gate is bypassed through the second transfer gate to the input signal source.

REFERENCES:
patent: 4228367 (1980-10-01), Brown
patent: 4473761 (1984-09-01), Peterson

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