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. 22, 2011
Filed:
Mar. 12, 2007
Takashi Oka, Osaka, JP;
Seiji Watanabe, Kyoto, JP;
Takashi Oka, Osaka, JP;
Seiji Watanabe, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In a voltage controlled oscillation circuit including a cascade connection of a voltage-to-current conversion circuit () for generating an input voltage converted current which is a current corresponding to an input voltage and a current controlled oscillation circuit () of which an oscillation frequency varies according to the input voltage converted current, the voltage-to-current conversion circuit () includes a first current source for outputting a current in proportion to the input voltage and a plurality of second current sources for outputting a current in proportion to a voltage obtained by shifting the input voltage. Then, a current obtained by adding a current output from the first current source and currents output from the plurality of current sources is output as the input voltage converted current to the current controlled oscillation circuit ().