Leakage current cancellation for integrated analog switch

Details Leakage current cancellation for integrated analog switch Leakage current cancellation for integrated analog switch

2008-10-30

2010-06-01

Nguyen, Hai L (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S404000

Reexamination Certificate

active

07728649

ABSTRACT:
An integrated analog switch including first and second semiconductor devices and a current mirror. The first device is a switching device having first and second current terminals coupled between first and second switch terminals. When turned off, the body of the first device is pulled to a bias voltage, and a first leakage current flows between its body and the first switch terminal. The second device is a reduced-size replica of the first device having one current terminal coupled to the first switch terminal and having its body pulled to about the bias voltage when turned off. The second device provides a second leakage current which is proportional to the leakage current of the first device. The current mirror circuit mirrors and amplifies the second leakage current to provide a cancellation current which is applied to the first switch terminal to cancel leakage current.

REFERENCES:
patent: 5594381 (1997-01-01), Bingham
patent: 6194952 (2001-02-01), Shigehara
patent: 6828846 (2004-12-01), Tsukazaki et al.
patent: 6847249 (2005-01-01), Brokaw
patent: 7521984 (2009-04-01), Ricotti
“HA-2600 Data Sheet.” Intersil. Jan. 16, 2006. FN2902.7. pp. 1-9.
“HA-5170 Data Sheet.” Intersil. Nov. 2004. FN2912.5 pp. 1-9.

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