Sample-and-hold device having input stages of amplifier...

Details Sample-and-hold device having input stages of amplifier... Sample-and-hold device having input stages of amplifier...

2007-09-18

2007-09-18

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S095000, C327S096000

Reexamination Certificate

active

11163355

ABSTRACT:
A sample-and-hold device including first and second capacitors, first and second switches, amplifier and feedback network is provided. The amplifier includes first and second input stages, output stage and switchable bias current source. The first switch and the first capacitor are coupled in series between input signal and first voltage, and a common node is coupled to a first positive input terminal of the amplifier. The first switch is on during first period and off during second period. The second switch and the second capacitor are coupled in series between the input signal and second voltage, and a common node is coupled to a second positive input terminal of the amplifier. The second switch is on during second period and off during first period. The switchable bias current source biases the second input stage during first period, and switches to bias the first input stage during second period.

REFERENCES:
patent: 5959470 (1999-09-01), Sugihashi
patent: 6628148 (2003-09-01), Shirasaki

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