Sampling circuit

Details Sampling circuit Sampling circuit

1983-06-14

1985-12-17

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

328151, 307359, 307353, H03K 1760, G11C 2702

Patent

active

045594570

ABSTRACT:
A sampling circuit generally suitable for a sample-and-hold circuit is disclosed which includes two differential amplifiers selectively rendered operative during the sampling and nonsampling periods, respectively, an adder for receiving output signals from the differential amplifiers, and a switching bipolar transistor. One differential amplifier is rendered operative during the sampling period. The output signal from this differential amplifier is negatively fed-back through the adder and the switching bipolar transistor to the inverting input terminal thereof connected to an output terminal of the sampling circuit. However, during the nonsampling interval, the other differential amplifier is rendered operative. The output signal from this differential amplifier is fed-back to the inverting input terminal thereof through the adder. Therefore, the switching bipolar transistor is rendered nonconductive, and the analog signal supplied to an input terminal of the sampling circuit is prevented from being transferred to the output terminal of the sampling circuit.

REFERENCES:
patent: 3526786 (1970-09-01), Snyder
patent: 3643110 (1972-02-01), Thompson
patent: 3694668 (1972-09-01), Foerster
Data Acquisition Components and Subsystems Catalog, Analog Devices, Inc., 1980.

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