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:
May. 14, 2013
Filed:
May. 13, 2008
Viet Linh DO, Carlsbad, CA (US);
Simon Pang, San Diego, CA (US);
Hongming an, San Diego, CA (US);
Jim Lew, San Diego, CA (US);
Viet Linh Do, Carlsbad, CA (US);
Simon Pang, San Diego, CA (US);
Hongming An, San Diego, CA (US);
Jim Lew, San Diego, CA (US);
Applied Micro Circuits Corporation, Sunnyvale, CA (US);
Abstract
A system and method are provided for synthesizing signal frequencies using rational division. The method accepts a reference frequency value and a synthesized frequency value. In response to dividing the synthesized frequency value by the reference frequency value, an integer value numerator (dp) and an integer value denominator (dq) are determined. The method reduces the ratio of dp/dq to an integer N and a ratio of p/q (dp/dq=N(p/q)), where p/q<1 (decimal). The numerator (p) and the denominator (q) are supplied to a flexible accumulator module, and a divisor is generated as a result. N is summed with a k-bit quotient to create the divisor. In a phase-locked loop (PLL), the divisor and the reference signal are used to generate a synthesized signal having a frequency equal to the synthesized frequency value.