Integrated circuit comparators having improved input...

Details Integrated circuit comparators having improved input... Integrated circuit comparators having improved input...

2008-09-16

2010-06-01

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S063000, C327S071000, C327S307000

Reexamination Certificate

active

07728632

ABSTRACT:
An integrated circuit comparator includes a pair of differential input transistors having gate terminals configured to receive a pair of differential input signals and a comparator output circuit electrically coupled to the pair of differential input transistors. A pair of differential offset compensation transistors are also provided. This pair of differential offset compensation transistors, which is electrically coupled to the pair of differential input transistors, has gate terminals that are configured to receive a pair of unequal dc offset voltages. The source and drain terminals of a first one of the pair of differential input transistors are electrically connected to corresponding source and drain terminals of a first one of the pair of differential offset compensation transistors and the source and drain terminals of a second one of the pair of differential input transistors are electrically connected to corresponding source and drain terminals of a second one of the pair of differential offset compensation transistors.

REFERENCES:
patent: 5517134 (1996-05-01), Yaklin
patent: 6320426 (2001-11-01), Shih
patent: 6617926 (2003-09-01), Casper et al.
patent: 6822501 (2004-11-01), Kinugasa
patent: 2009/0224805 (2009-09-01), Bore et al.
Wong et al., “Offset Compensation in Comparators With Minimum Input-Referred Supply Noise,” IEEE Journal of Solid-State Circuits, vol. 39, No. 5, May 2004, pp. 837-840.

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