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:
May. 10, 1988
Filed:
Oct. 23, 1986
Jun'ichi Nakagawa, Tokorozawa, JP;
Yoshitomo Kuwamoto, Yokosuka, JP;
Hidefumi Kimura, Katsuta, JP;
Hideaki Watanabe, Katsuta, JP;
Masanori Ienaka, Takasaki, JP;
Hitachi, Ltd, Tokyo, JP;
Hitachi Video Engineering, Inc., Tokyo, JP;
Abstract
In an intermittently operative phase-locked loop, in order to prevent the oscillator frequency from significantly changing at the time of turning on of an electric power source, a point in time at which a phase difference between clock signals respectively fed to a reference frequency divider and to a frequency divider for dividing the output frequency of a voltage-controlled oscillator becomes substantially zero is detected, and the two frequency dividers are initialized when the above-mentioned point in time is detected after turning on of the electric power source.