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. 28, 2007
Filed:
Nov. 18, 2003
Rodney Dean Miller, Kernersville, NC (US);
George F. Diniz, Liberty, NC (US);
Ernest T. Stroud, Greensboro, NC (US);
Rodney Dean Miller, Kernersville, NC (US);
George F. Diniz, Liberty, NC (US);
Ernest T. Stroud, Greensboro, NC (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Phase-locked loop structures are provided that facilitate enhanced stability of loop-generated signals. They include an oscillator network, a feedback loop and a controller. The oscillator network generates a loop output signal with a frequency that varies in response to a control voltage and to a frequency-determining parameter, the feedback loop generates the control voltage in response to the loop output signal and a reference signal and the controller increments the frequency-determining parameter to maintain the control voltage within a predetermined control-voltage range. These structures enhance signal stability by facilitating the use of low-gain oscillator structures and they simplify and shorten loop operations because the structures operate in a closed-loop condition at all times.