Low-leakage switch for sample and hold

Details Low-leakage switch for sample and hold Low-leakage switch for sample and hold

2008-10-10

2010-10-12

Zweizig, Jeffrey S (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

Reexamination Certificate

active

07812646

ABSTRACT:
An integrated electronic device includes a sample and hold stage. The sample and hold stage has a sampling capacitor (C) for an input voltage at an input node (Vin), a first switch (S1) coupled between the input node (Vin) and the sampling capacitor (C) for connecting the input node (Vin) to the sampling capacitor (C). There is also a voltage follower with an input coupled to the sampling capacitor (C). The first switch (S1) includes a first MOS transistor (NM1) coupled between the input node (Vin) and the sampling capacitor (C). The first MOS transistor has a bulk. The sample and hold stage is adapted to selectively couple the bulk to a node having a voltage level (V3) which is equal or close to the voltage level at the input node of the voltage follower.

REFERENCES:
patent: 5422583 (1995-06-01), Blake et al.
patent: 6265911 (2001-07-01), Nairn
patent: 6504406 (2003-01-01), Kakitani
patent: 6577168 (2003-06-01), Kakitani
patent: 7532042 (2009-05-01), Lee

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