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:
Oct. 30, 2007
Filed:
Nov. 10, 2005
Axel Thomsen, Austin, TX (US);
Yunteng Huang, Irvine, CA (US);
Jerrell P. Hein, Driftwood, TX (US);
Derrick C. Wei, Austin, TX (US);
Axel Thomsen, Austin, TX (US);
Yunteng Huang, Irvine, CA (US);
Jerrell P. Hein, Driftwood, TX (US);
Derrick C. Wei, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
A voltage controlled clock synthesizer includes a phase-locked loop (PLL) circuit that receives a timing reference signal, a controllable oscillator circuit, such as a VCO, providing an oscillator output signal, and a feedback divider circuit coupled to the oscillator output signal. The frequency of the oscillator output signal is determined in part according to a stored value used to generate a first digital control signal that determines a divide ratio of the feedback divider circuit. A control voltage present on a voltage control input adjusts the frequency of the oscillator output signal around a frequency determined by the stored value. The control voltage is converted to second digital signal and is utilized in determining the first digital control signal in combination with the stored value.