Switching circuit for signal sampling with reduced residual char

Details Switching circuit for signal sampling with reduced residual char Switching circuit for signal sampling with reduced residual char

1994-07-29

1996-07-09

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327 91, 327382, 327404, H03K 17687

Patent

active

055348157

ABSTRACT:
An electronic switch for sampling a signal. A small switch is placed in parallel with a large switch. The large switch is opened first. Any residual charge from the large switch is compensated by a low impedance path through the small switch. Speed is maximized by providing high current capacity through the large switch. Noise is minimized by leaving only residual charge from the small switch. Example embodiments are provided for sampling both voltage and current signals.

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H. C. Yang, T. S. Fiez, D. J. Allstot, "Current Feedthrough Effects and Cancellation Techniques In Switched-Current Circuits", 1990 IEEE International Symposium On Circuits and Systems, vol. 4, pp. 3186-3188,1990.

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