Wide-band sample and hold circuit

Details Wide-band sample and hold circuit Wide-band sample and hold circuit

1993-08-17

1995-02-21

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327403, G11C 2702, H03K 5159

Patent

active

053919360

ABSTRACT:
A wide-band sample and hold circuit comprising an input buffer for inputting an analog input signal and buffering the inputted analog input signal, 1/2 frequency divider for frequency-dividing a sample and hold clock signal by two and outputting a 1/2 frequency clock signal, first switching circuit for switching in turn an output signal from said input buffer to sample and hold condensers in accordance with the 1/2 frequency clock signal, second switching circuit for switching selectivel sample and hold signals from the sample and hold condensers in accordance with said 1/2 frequency clock signal and transferring or block the selectively switched sample and hold signals in accordance with an inverted sample and hold clock signal, and an output buffer for buffering an output signal from said second switching circuit and outputting the buffered signal as an output signal of the sample and hold circuit. Therefore, the circuit of the present invention can have sampling and holding intervals enough to meet a variation of the wide-band analog input signal, resulting in its stabilized sampling operation, so that the capacity of the sample and condensers can be selected suitably to the circuit.

REFERENCES:
patent: 3226650 (1965-12-01), Higbie
patent: 4373141 (1983-02-01), Sanders
G. Floom, "A Multiplexing Track-and-Hold circuit with Standard CMOS Transmission Gates" Electronics Dept. Univ. of Stockholm, Apr., 1977 18 pp.

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