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:
Apr. 06, 2004
Filed:
Sep. 26, 2000
Russell N. Mirov, Los Altos, CA (US);
Michel Cekleov, Mountain View, CA (US);
Mark Young, Mountain View, CA (US);
William M. Baldwin, San Jose, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
In one aspect of the present invention, a method for controlling the operation of a phase locked loop circuit is provided. The method is comprised of monitoring a frequency of a system clock, and a first signal is delivered in response to the detected frequency of the system clock being greater than a preselected setpoint. A second signal is delivered in response to the detected frequency of the system clock being less than a preselected setpoint. A first operating mode of the phase locked loop circuit is selected in response to receiving the first signal. The first mode of operation allows the phase locked loop circuit to synchronize with a clock signal in a first preselected range of frequencies. A second operating mode of the phase locked loop circuit is selected in response to receiving the second signal. The second mode of operation allows the phase locked loop circuit to synchronize with a clock signal in a second preselected range of frequencies.