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:
Feb. 26, 2013
Filed:
Jul. 11, 2011
Takashi Kuramochi, Tokyo, JP;
Takashi Kuramochi, Tokyo, JP;
Oki Semiconductor Co., Ltd., Tokyo, JP;
Abstract
A frequency synthesizer device that includes two modulation paths and suitably adjusts the amplitude of a control voltage that is outputted from a digital-to-analog converter (DAC) to a voltage-controlled oscillator. The frequency synthesizer device is provided with a voltage-controlled oscillator, a programmable frequency divider, a frequency phase comparator, a DAC, a switch and a modulation frequency displacement correction circuit. The voltage-controlled oscillator oscillates at an oscillation frequency depending on an input voltage. The programmable frequency divider frequency-divides a signal from the voltage-controlled oscillator. The frequency phase comparator outputs a phase difference between the frequency-divided signal and a reference clock. The DAC outputs an adjustment voltage. The switch connects the voltage-controlled oscillator to a reference voltage power source at a time of correction of the adjustment voltage. The modulation frequency displacement correction circuit specifies adjustment data that corresponds to the adjustment voltage corresponding to the target frequency displacement.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile