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. 09, 2003
Filed:
Jun. 21, 2001
Yoshiaki Ito, Hyogo, JP;
Yoshiyuki Ota, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A voltage-controlled oscillating circuit according to the present invention includes: a bias voltage generating circuit outputting a bias voltage according to a control voltage; and a ring oscillator circuit receiving supply of the bias voltage to operate. The bias voltage generating circuit generates the bias voltage using a feedback circuit formed by an operational amplifier receiving supply of a power source voltage to operate. Therefore, an influence of a high frequency component overlapped on the power source voltage, that is an influence of noise, is suppressed, thereby enabling stable generation of an output clock having a small variation in phase.