Comparator and pipelined ADC utilizing the same

Details Comparator and pipelined ADC utilizing the same Comparator and pipelined ADC utilizing the same

2008-11-21

2010-12-07

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S091000, C327S094000, C327S534000, C341S155000, C341S158000, C341S172000

Reexamination Certificate

active

07847601

ABSTRACT:
A comparator includes a plurality of switches, a capacitor, an amplifier, and a latch. The switches provide an input signal during a first period and provide a reference signal during a second period. A first switch among the switches is composed of a first transistor. The capacitor receives the input signal during the first period and receives the reference signal during the second period. The amplifier is coupled to the capacitor for receiving a difference voltage between the input signal and the reference signal and amplifies the difference voltage during the second period to generate an amplified result. The determining circuit provides a digital signal according to the amplified result.

REFERENCES:
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patent: 2007/0090984 (2007-04-01), Lu et al.
patent: 2009/0303092 (2009-12-01), Tu et al.

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