Glitch-free clock switching apparatus

Details Glitch-free clock switching apparatus Glitch-free clock switching apparatus

2007-02-20

2007-02-20

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

Having selection between plural continuous waveforms

C327S298000

Reexamination Certificate

active

11109326

ABSTRACT:
In a clock switching apparatus, a corresponding mask clock signal is generated for at least one of first and second clock signals. A mask clock signal has an interval of a predetermined logical level near the switching between the clock signals. Each mask clock signal is synchronized to the first and/or second clock signals. Such an interval in the mask clock signal prevents occurrence of glitches in an output clock signal that is switched between at least one mask clock signal and/or at least one clock signal.

REFERENCES:
patent: 5357146 (1994-10-01), Heimann
patent: 5623223 (1997-04-01), Pasqualini
patent: 6559679 (2003-05-01), Kim
patent: 6563349 (2003-05-01), Menezes et al.
patent: 6600345 (2003-07-01), Boutaud
patent: 7046047 (2006-05-01), Daijo
Korean Patent Application No. 1019960043660 to Park, having Publication date of Mar. 13, 1999 (w/English Abstract page).

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