Electronic analog switching device

Details Electronic analog switching device Electronic analog switching device

1981-08-31

1983-10-18

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307239, 307353, 307582, H03K 1716, H03K 17687, G11C 2702

Patent

active

044108559

ABSTRACT:
An electronic analog switching device comprises a differential operational amplifier (1) with a feedback circuit between its output (2) and its inverting (-) input such that its (low impedance) output voltage follows the input signal voltage applied to its non-inverting (+) input. The output voltage is sampled by a first switch (5) and the samples are passed to the device output (4) where, for example, they may be stored on a capacitor (7). The feedback circuit has two paths, one via a feedback impedance (9) and the other via the first switch (5) and a second switch (8) operated synchronously with the first switch by control means (6). The "on" impedance of the first switch (5) is greatly reduced by including it in the feedback circuit, and the further inclusion of the second switch (8) and the impedance (9) substantially eliminates unwanted transient voltages that would otherwise occur under some circumstances when the first switch operates.

REFERENCES:
patent: 3700998 (1972-10-01), Lee et al.
patent: 4199697 (1980-04-01), Edwards
patent: 4352070 (1982-09-01), Beauducel et al.

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