The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2002
Filed:
Jun. 27, 2000
Yi Lu, Portland, OR (US);
Ian A. Young, Portland, OR (US);
Keng L. Wong, Portland, OR (US);
Douglas R. Parker, Forest Grove, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A startup control voltage preset method and apparatus to reduce phase locked loop lock acquisition time at startup. In one embodiment, the disclosed apparatus includes a phase locked loop circuit including a startup circuit that is activated at startup. The startup circuit is coupled to force a control input of a voltage control oscillator of the phase lock loop circuit across a loop filter to a voltage at or near a target nominal operating voltage. In one embodiment, the target nominal operating voltage corresponds to a target operating frequency of the phase locked loop circuit. In one embodiment, the startup circuit is coupled to be activated for a predetermined time at startup. In one embodiment, the startup circuit is coupled to be activated at startup until the control input voltage of the voltage controlled oscillator is at or near a reference voltage.