Clock input filter circuit

Details Clock input filter circuit Clock input filter circuit

2011-04-19

2011-04-19

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By pulse width or spacing

C327S175000, C327S291000, C327S299000

Reexamination Certificate

active

07928772

ABSTRACT:
A clock input filter uses a first programmable low-pass delay element to filter during a low period of an input clock signal and to output a SET signal. The clock input filter uses a second programmable low-pass delay element to filter during a high period of the input clock signal and to output a RESET signal. A latch is set and reset by the SET and RESET signals. The latch outputs a filtered version of the input signal that has the same approximate duty cycle as the input signal. A pair of gates generates a corresponding pair of duty cycle adjusted versions of the input signal. Output multiplexing circuitry is provided to output either the output of the latch, or an increased duty cycle version of the input signal, or a decreased duty cycle version of the input signal, or an unfiltered version of the input signal.

REFERENCES:
patent: 3566037 (1971-02-01), Fichtner
patent: 3566038 (1971-02-01), Slavin
patent: 3585307 (1971-06-01), Greenberg
patent: 3904894 (1975-09-01), Ciolli
patent: 4355283 (1982-10-01), Ott
patent: 5537068 (1996-07-01), Konno
patent: 5650739 (1997-07-01), Hui et al.
patent: 5841296 (1998-11-01), Churcher et al.
patent: 6078191 (2000-06-01), Chan et al.
patent: 6084482 (2000-07-01), Nakamura
patent: 6504409 (2003-01-01), Laletin
patent: 6507221 (2003-01-01), La Rosa
patent: 6535057 (2003-03-01), Chakravarthy
patent: 6642760 (2003-11-01), Alon et al.
patent: 6853227 (2005-02-01), Laletin
patent: 6998894 (2006-02-01), Lee et al.
patent: 7296170 (2007-11-01), Richmond et al.
patent: 7411427 (2008-08-01), Fong
patent: 7592843 (2009-09-01), Fong
patent: 2004/0108878 (2004-06-01), Dosho et al.
patent: 2005/0068083 (2005-03-01), Kuroiwa
patent: 2006/0082391 (2006-04-01), Hsu et al.

Affiliated with

Also associated with

Rating

Clock input filter circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock input filter circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock input filter circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2682339