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. 12, 2002
Filed:
Jul. 20, 2000
Kouzou Ichimaru, Ohita Ken, JP;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A frequency synthesizer that can accurately compensate for ripple current. The frequency synthesizer having a PLL loop containing an oscillator and a charge pump circuit has a detector circuit and a delay circuit The detector circuit by detecting a ripple current with a superimposed compensating current, detects the time difference between the output time of the compensating current and the output time of the ripple current, and since the delay circuit delays one or both of the output time of the compensating current and the output time of the ripple current based on that detection result, the time difference for the output times can be made small, and if a compensating current is supplied that is equal to the ripple current, it becomes possible to accurately remove the ripple current.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile