Sample-and-hold apparatus and operating method thereof

Details Sample-and-hold apparatus and operating method thereof Sample-and-hold apparatus and operating method thereof

2007-05-04

2009-06-02

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S094000, C327S095000, C327S096000

Reexamination Certificate

active

07541846

ABSTRACT:
A sample-and-hold apparatus and an operating method thereof are provided. The sample-and-hold apparatus includes a sampling amplifier, a transistor, a first switch, a second switch, a sampling capacitor, and a drain-charge unit. A first input terminal of the sampling amplifier receives an input signal. A first-terminal of the transistor is coupled to a first voltage. The first switch is coupled between an output terminal of the sampling amplifier and a gate of the transistor. The first and second terminals of the second switch are coupled to a second terminal of the transistor and a second input terminal of the sampling amplifier, respectively. The first and second terminals of the sampling capacitor are coupled to the gate of the transistor and a reference voltage. The drain-charge unit for draining/providing charges has first and second terminals coupled to the second terminal of the second switch and a second voltage, respectively.

REFERENCES:
patent: 4068136 (1978-01-01), Minami
patent: 5736879 (1998-04-01), Pham
patent: 5874842 (1999-02-01), Masuta
patent: 5982205 (1999-11-01), Vallancourt
patent: 2004/0017225 (2004-01-01), Draxelmayr

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