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:
Mar. 26, 2013
Filed:
Aug. 20, 2008
Viet Linh DO, Carlsbad, CA (US);
Mehmet Mustafa Eker, San Marcos, CA (US);
Viet Linh Do, Carlsbad, CA (US);
Mehmet Mustafa Eker, San Marcos, CA (US);
Applied Micro Circuits Corporation, Sunnyvale, CA (US);
Abstract
A system and method are provided for reacquiring a non-synchronous communication signal in a clock and data recovery (CDR) device frequency synthesizer. The method initially acquires the phase of a non-synchronous communication signal having an input data frequency. In response to acquiring the phase of the input data frequency, a synthesized signal is generated having an output frequency. Also as a result of acquiring the input data frequency, a frequency ratio value is selected. The output frequency is divided by the selected frequency ratio value, creating a divisor signal having a divisor frequency, which is compared to a reference signal frequency. In response to the comparison, the frequency ratio value is saved in a tangible memory medium. In response to losing phase-lock with the communication signal, the frequency ratio value is retrieved from memory. After acquiring the input data frequency, the phase of the communication signal is reacquired.