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:
Aug. 31, 2010
Filed:
Aug. 28, 2008
Michael S. Buonpane, Easton, PA (US);
James D. Chlipala, Emmaus, PA (US);
Richard P. Martin, Macungie, PA (US);
Scott A. Segan, Allentown, PA (US);
Zhongke Wang, Bridgewater, NJ (US);
Michael S. Buonpane, Easton, PA (US);
James D. Chlipala, Emmaus, PA (US);
Richard P. Martin, Macungie, PA (US);
Scott A. Segan, Allentown, PA (US);
Zhongke Wang, Bridgewater, NJ (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
Generally, methods and apparatus are provided for deriving an integrated circuit (IC) clock signal with a frequency that is offset from the IC system clock. An offset clock having a frequency that is offset from a system clock is generated by configuring a ring oscillator in a first mode to generate the system clock having a desired frequency; and adjusting the configuration of the ring oscillator in a second mode to generate the offset clock having the frequency that is offset from the system clock. The configuration of the ring oscillator is adjusted in the second mode by adjusting (i) a power supply value applied to the ring oscillator in the second mode relative to a power supply value applied in the first mode; or (ii) a number of delay line elements that are active in the ring oscillator loop.