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:
Jun. 28, 1988
Filed:
Feb. 26, 1987
Yukinari Fujiwara, Kodaira, JP;
Hitachi Denshi Kabushiki Kaisha, Tokyo, JP;
Abstract
A synthesizer apparatus includes a reference oscillator for generating a reference signal, a voltage controlled oscillator (VCO) whose oscillation frequency is controlled by a control signal, a frequency divider, which is intermittently operated, for frequency-dividing the output signal from the VCO, and a phase comparator for comparing the phases of the reference signal and the output signal from the frequency divider, and supplying a control signal to the VCO in accordance with the phase difference. The phase comparator outputs an average value signal having an average value corresponding to a difference in pulse rise times of the output signal from the frequency divider during an operation period of the frequency divider.