Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – Having selection between plural continuous waveforms
Reexamination Certificate
2005-12-13
2005-12-13
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
06975145
ABSTRACT:
Described are glitchless clock control circuits capable of switching away from a failed clock. One embodiment supports three basic functions: clock select, clock enable, and clock ignore. The clock-select function provides a selected one of a plurality of clock signals on a clock-distribution node. The select signals used to switch between clock signals need to be synchronous with any of the clock signals. The clock-enable function allows the clock control circuit to synchronously block or pass a selected clock signal. Finally, the clock-ignore function allows the clock control circuit to ignore a selected clock if necessary, for example, to switch away from a failed clock.
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Vadi Vasisht M.
Young Steven P.
Behiel Arthur J.
Lam Tuan T.
Maunu LeRoy D.
Xilinx , Inc.
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