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:
Dec. 11, 2001
Filed:
May. 31, 2000
Yoshikazu Iinuma, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In a PLL circuit, with respect to a specific oscillation frequency representing a target frequency of an oscillation circuit in a PLL loop, a lower limit value and an upper limit value are set in advance in a predetermined range including the specified oscillation frequency, and a boost-up circuit which applies to the PLL loop or causes the PLL loop to generate a signal which causes to shift a control voltage in the direction of oscillating at the specified frequency in response to when the frequency of an output signal assumes the lower limit value or less than that of the predetermined range and further causes to shift the control voltage in the direction of oscillating at the specified frequency in response to when the frequency of the output signal assumes the upper limit value or more than that of the predetermined range, whereby a ringing of the frequency of the output signal when the PLL circuit is started, is suppressed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile