Track and hold amplifiers and analog to digital converters

Details Track and hold amplifiers and analog to digital converters Track and hold amplifiers and analog to digital converters

2011-05-24

2011-05-24

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Sample and hold

C341S155000, C341S172000, C327S094000

Reexamination Certificate

active

07948411

ABSTRACT:
A track and hold amplifier is provided. The track and hold amplifier includes an input node receiving an analog signal, a buffer coupled between a first node and an output node, a first switch coupled between the input node and the first node, a plurality of switching circuits and a voltage generating unit. Each of the switching circuits includes a capacitor coupled between the first node and a second node. The voltage generating unit selectively provides a common signal or a reference signal to the capacitors of the switching circuits, wherein the reference signal is independent from the analog signal.

REFERENCES:
patent: 5305004 (1994-04-01), Fattaruso
patent: 6281717 (2001-08-01), Thomas
patent: 6529049 (2003-03-01), Erhart et al.
patent: 7161512 (2007-01-01), Keskin
patent: 7161514 (2007-01-01), Tamba
patent: 2005/0270197 (2005-12-01), Smith et al.
Pieter Harpe et al. “Analog Calibration of Mismatches in an Open-Loop Track-and-Hold Circuit for Time-Interleaved ADCs”, ISCAS, 2007.

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