Differential signal comparator

Details Differential signal comparator Differential signal comparator

2007-12-20

2009-08-11

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S066000, C327S067000, C327S359000

Reexamination Certificate

active

07573302

ABSTRACT:
There is provided a differential signal comparator which maintains the duty ratio of complementary input signals. The differential signal comparator includes differential amplifier circuits1and2receiving complementary input signals, a plurality of current amplifier circuits3to6for amplifying current output from the differential amplifier circuits and a current arithmetic operation circuit7for an arithmetic operation of an output from the plurality of current amplifier circuits3to6at the time of converting the differential signal between the complementary input signals into a voltage of CMOS level, wherein a capacitive load of an output of the differential amplifier circuit is constant independent of a level of the input signals. A voltage signal which is current-voltage converted to a complementary CMOS level signal is input into a differential comparator to obtain a single end CMOS level signal.

REFERENCES:
patent: 5006732 (1991-04-01), Nakamura
patent: 6670773 (2003-12-01), Nakamura et al.
patent: 6777984 (2004-08-01), Hangaishi
patent: 6870553 (2005-03-01), Kondo et al.
patent: 6992663 (2006-01-01), Nakamura et al.
patent: 7248115 (2007-07-01), Nishimura
patent: 2006/0103433 (2006-05-01), Nishimura
patent: 2006-148364 (2006-06-01), None
U.S. Appl. No. 11/961,733, filed Dec. 20, 2007, Applicant: Hiroyuki Nakamura.

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