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. 05, 2013
Filed:
Jan. 24, 2011
Takashi Nakamura, Kanagawa, JP;
Kosuke Yayama, Kanagawa, JP;
Takashi Nakamura, Kanagawa, JP;
Kosuke Yayama, Kanagawa, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A high-accuracy clock signal is generated even when the settings of the clock frequency are changed or there is a variation in power supply, temperature, or the like. A frequency-voltage conversion circuit includes a switch portion including switches, electrostatic capacitive elements, and other switches. The electrostatic capacitive elements have different absolute capacitance values, and are provided so as to cover a frequency range intended by a designer. For example, based on 4-bit frequency adjustment control signals, the other switches select the electrostatic capacitive elements having the electrostatic capacitance values thereof each weighted with 2 to perform the switching of a frequency.