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:
Sep. 20, 2005
Filed:
Jun. 26, 1998
Kazuo Kato, Naka-Gun, JP;
Takashi Sase, Hitachi, JP;
Takashi Hotta, Hitachi, JP;
Hirokazu Aoki, Hachioji, JP;
Kozaburo Kurita, Ome, JP;
Kazuo Kato, Naka-Gun, JP;
Takashi Sase, Hitachi, JP;
Takashi Hotta, Hitachi, JP;
Hirokazu Aoki, Hachioji, JP;
Kozaburo Kurita, Ome, JP;
Renesas Technology Corporation, Tokyo, JP;
Abstract
A phase locked loop (PLL) circuit is provided to operate in a broad band, including two separate loops one of which is for feed-back of an output from an oscillator to the same oscillator through its associative proportional control unit and the other of which is for feed-back of an output of an oscillator to the same oscillator via an integral control unit. The proportional control unit is arranged to control an output frequency of the oscillator and is operable to generate a control signal based on a difference between input and output signals. The integral control unit is arranged to control the phase of an output signal of the oscillator to thereby generate a control signal based on a phase difference between input and output signals.