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:
Jan. 20, 2009
Filed:
Jun. 29, 2005
Alireza S. Kaviani, San Jose, CA (US);
Maheen A. Samad, Mountain View, CA (US);
Alireza S. Kaviani, San Jose, CA (US);
Maheen A. Samad, Mountain View, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
A circuit for frequency synthesis in an integrated circuit is described. The circuit comprises an oscillator circuit having a counter-controlled delay line. A delay register is coupled to the counter-controlled delay line. The delay register stores a delay value for the counter-controlled delay line. Finally, a phase synchronizer circuit, coupled to the oscillator circuit, controls the starting and stopping of the oscillator circuit. According to alternate embodiments, a control circuit is coupled to the oscillator circuit for changing the frequency synthesizer from a low frequency mode to a high frequency mode.