Method and apparatus for performing voltage sampling

Details Method and apparatus for performing voltage sampling Method and apparatus for performing voltage sampling

1998-03-12

2000-05-02

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 94, G11C 2702

Patent

active

060577134

ABSTRACT:
Method and apparatus for performing voltage sampling. The present invention addresses the problems encountered when a voltage is applied to a voltage sampling circuit (76). An additional capacitor (88) is used to store an amount of charge similar to the amount of charge needed by a primary capacitor (89) which provides an output signal to a voltage receiving circuit (74), such as a portion of a sigma-delta analog to digital converter. The additional capacitor (88) is charged while a primary capacitor (89) is discharged in a first clock phase. Then the additional capacitor (88) and the primary capacitor (89) are both coupled to the voltage to be sampled during a second clock phase.

REFERENCES:
patent: 4835482 (1989-05-01), Tamakoshi et al.
patent: 5331230 (1994-07-01), Ichihara
patent: 5424670 (1995-06-01), Samuels et al.

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