Apparatus and method to change a processor clock frequency

Apparatus and method to change a processor clock frequency

An apparatus and method for providing a variable frequency clock source is described wherein the frequency may be changed while maintaining the phase of the clock signal. A frequency conversation circuit, such as a phase locked loop (PLL), is employed to change the frequency of the clock and is cont...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: STROM, JAMES DAVID, JOHNSON, CHARLES LUTHER, GANFIELD, PAUL ALLEN
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:An apparatus and method for providing a variable frequency clock source is described wherein the frequency may be changed while maintaining the phase of the clock signal. A frequency conversation circuit, such as a phase locked loop (PLL), is employed to change the frequency of the clock and is controlled by a control unit which maintains the phase of the output clock signal while undergoing a frequency change operation.