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:
Sep. 25, 2007
Filed:
Sep. 15, 2005
Timothy Gillespie, Beverly Hills, AU;
William G. Baker, North Parramatta, AU;
Timothy Gillespie, Beverly Hills, AU;
William G. Baker, North Parramatta, AU;
Integrated Device Technology, Inc., San Jose, CA (US);
Abstract
A frequency synthesizer IC is disclosed that includes a variable delay circuit, a fractional-N phase locked loop circuit, and a feedback loop. The variable delay circuit is electrically coupled to the input of the fractional-N phase locked loop circuit. The feedback loop couples a first control signal from the fractional-N phase locked loop to the variable delay circuit. The variable delay circuit generates a reference signal that has a phase delay that varies in accordance with a second control signal and a first control signal. The fractional-N phase locked loop circuit is operable upon receiving the reference signal to generate the first control signal, the second control signal, and an output signal having a frequency that is a non-integer product of the reference signal.