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:
Apr. 08, 2014
Filed:
Feb. 19, 2010
Takashi Nakamura, Kanagawa, JP;
Kosuke Yayama, Kanagawa, JP;
Takashi Nakamura, Kanagawa, JP;
Kosuke Yayama, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A frequency-voltage converting circuitis composed of a switch unit including switches SWand SW, electrostatic capacitive elements C and Cto C, and switches CSWto CSW. The electrostatic capacitive elements Cto Care composed of elements having mutually different absolute values of capacitance and are provided so as to cover a frequency range intended by a designer. The electrostatic capacitance values are weighted by, for example, 2. The electrostatic capacitive elements Cto Care selected by, for example, the switches CSWto CSWbased on 4-bit frequency adjustment control signals SELCto SELC, thereby carrying out frequency switching.