Method and apparatus for providing transient suppression in a ce

Details Method and apparatus for providing transient suppression in a ce Method and apparatus for providing transient suppression in a ce

1998-08-31

2000-08-15

Mis, Davis

Oscillators

Automatic frequency stabilization using a phase or frequency...

With intermittent comparison controls

331 1A, 331 8, 331 16, 331 17, 331 18, 331 25, 327157, 327159, H03L 7085, H03L 718

Patent

active

06104251&

ABSTRACT:
The present invention is directed to apparatus and methods for reducing transient signals in phase locked loop (PLL) circuits of central processing units. One aspect of the present invention is directed to a method and apparatus that disables a charge pump circuit in a phase locked loop circuit when a frequency change in the output signal of the PLL circuit is implemented to limit transient signals generated by the PLL. Another aspect of the present invention is directed to a method and apparatus for coordinating a change in divider values for frequency dividers in a PLL of a CPU to limit transient signals from the PLL.

REFERENCES:
patent: 5614870 (1997-03-01), Sauer et al.
patent: 5847614 (1998-12-01), Gilbert et al.
patent: 5877656 (1999-03-01), Mann et al.

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