Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2007-09-11
2007-09-11
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S159000
Reexamination Certificate
active
11164637
ABSTRACT:
A phase- or frequency-locked loop circuit (200) that generates an accurate output signal (ACC_SYN_OUT) even in the presence of edge-triggering-type glitches (148, 304A,304B) in the input reference clock signal (REF_CLK). The locked-loop circuit includes a phase or frequency difference detector (216) and a glitch detector (208) that generates a trigger signal (GLITCH_DETECTED) upon detection of at least one glitch. The trigger signal resets the difference detector so as to abort the updating of the output signal that the glitch would otherwise cause.
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Carlile Paul S.
Green Barton E.
Jordan Robert C.
Perri Anthony J.
Downs Rachlin & Martin PLLC
International Business Machines - Corporation
Luu An T.
Wells Kenneth B.
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