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.:

US 8451066 B1

PDF
Full Text
Expired
Date of Patent:
May. 28, 2013

Filed:

Nov. 07, 2008
Applicants:

Hideyuki Murakami, Osaka, JP;

Takashi Kawai, Fukui, JP;

Kouji Nabetani, Fukui, JP;

Inventors:

Hideyuki Murakami, Osaka, JP;

Takashi Kawai, Fukui, JP;

Kouji Nabetani, Fukui, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/085 (2006.01);
U.S. Cl.
CPC ...
Abstract

A PLL circuit is provided with an AD converter, a DA converter to which output from the AD converter is inputted, a filter circuit filtering an output signal of the DA converter, a voltage control oscillator outputting a signal of a different frequency in accordance with an output signal from the filter circuit and a frequency divider dividing a signal which the voltage control oscillator outputs. The AD converter operates by a timing signal from the voltage control oscillator and the DA converter outputs an analog signal corresponding to a value which the AD converter outputs by the timing signal outputted from the frequency divider.


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