Circuit for switching between different frequency clock domains

Details Circuit for switching between different frequency clock domains Circuit for switching between different frequency clock domains

1996-08-02

1998-09-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

Having selection between plural continuous waveforms

327407, 327298, H03K 513, H03K 1700

Patent

active

058119957

ABSTRACT:
A circuit and method for switching between different frequency clock domains that are out of phase. The circuit has a select input for selecting which frequency domain is to be output, a first circuit associated with the first clock domain, and a second circuit associated with the second clock domain. The first and second circuits are responsive to the select input and work together to disengage the first clock before the second clock is engaged.

REFERENCES:
patent: 4644568 (1987-02-01), Canniff et al.
patent: 4870299 (1989-09-01), Chen
patent: 4899351 (1990-02-01), Bonke
patent: 4970405 (1990-11-01), Hagiwara
patent: 5291528 (1994-03-01), Vermeer
patent: 5315181 (1994-05-01), Schowe
patent: 5357146 (1994-10-01), Heimann

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