Method and circuit for glitchless clock control

Details Method and circuit for glitchless clock control Method and circuit for glitchless clock control

2005-03-29

2005-03-29

Le, Don (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Sequential or with flip-flop

C326S038000, C326S093000

Reexamination Certificate

active

06873183

ABSTRACT:
A clock control circuit routes one of a plurality of clock signals to a clock output node, and employs an asynchronous state machine to switch between clock signals without introducing glitches. To switch from a first to a second clock, the control circuit samples the logic level of the first clock signal to obtain a sampled logic level. The control circuit then provides a constant version of the sampled logic level on the clock output terminal until the second clock signal transitions to the sampled logic level, at which point the control circuit routes the second clock signal to the clock output node.

REFERENCES:
patent: 4635249 (1987-01-01), Bortolini et al.
patent: 5623223 (1997-04-01), Pasqualini
patent: 5694327 (1997-12-01), Schurig et al.
patent: 6041371 (2000-03-01), Provence
patent: 6266780 (2001-07-01), Grundvig et al.
patent: 6275546 (2001-08-01), Miller et al.
patent: 6348828 (2002-02-01), Barnes
patent: 6429698 (2002-08-01), Young
patent: 6453425 (2002-09-01), Hede et al.
patent: 6472909 (2002-10-01), Young
patent: 6532257 (2003-03-01), Piirainen
patent: 6782064 (2004-08-01), Schwake
Randy Nuss, “A New Paradigm for Synchronous State Machine Design in Verilog,” 1999, pp. 1-7, available at www.ideaconsulting.com, Idea Consulting.

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