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:
Feb. 06, 2006
Alexander Wayne Hietala, Phoenix, AZ (US);
Ryan Lee Bunch, Greensboro, NC (US);
Scott Robert Humphreys, Greensboro, NC (US);
Barry Travis Hunt, Jr., Greensboro, NC (US);
Alexander Wayne Hietala, Phoenix, AZ (US);
Ryan Lee Bunch, Greensboro, NC (US);
Scott Robert Humphreys, Greensboro, NC (US);
Barry Travis Hunt, Jr., Greensboro, NC (US);
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
A system providing a phase or frequency modulated signal is provided. In general, the system includes a phase locked loop (PLL) having a fractional-N divider in a reference path of the PLL operating to divide a reference frequency based on a pre-distorted modulation signal. Pre-distortion circuitry operates to provide the pre-distorted modulation signal by pre-distorting a modulation signal such that a convolution, or cascade, of the pre-distortion and a transfer function of the PLL results in a substantially flat frequency response for a range of modulation rates greater than a bandwidth of the PLL.