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:
Jul. 30, 2019
Filed:
Nov. 30, 2017
International Business Machines Corporation, Armonk, NY (US);
Mark A. Ferriss, Tarrytown, NY (US);
Daniel J. Friedman, Sleepy Hollow, NY (US);
Bodhisatwa Sadhu, Fishkill, NY (US);
Wooram Lee, Briarcliff Manor, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A phase-locked loop circuit includes an oscillator, a frequency control device, the frequency control device generating a frequency control signal that controls a frequency of the oscillator, and a bias optimizer that monitors the frequency control device and generates a bias voltage for the oscillator, the oscillator includes a transfer function from bias voltage to frequency that is proportional to a transfer function from a low frequency noise component to frequency, the transfer function from bias voltage to frequency having a convex shape with a local minimum at which a sensitivity of the frequency to changes in the bias voltage is zero, and the bias voltage from the bias optimizer is set to the local minimum.