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:
Dec. 15, 2009
Filed:
Aug. 23, 2007
Kazuhisa Raita, Kyoto, JP;
Ichiro Yamane, Kyoto, JP;
Yoshitaka Kitao, Kyoto, JP;
Toshifumi Hamaguchi, Osaka, JP;
Takahiro Inauchi, Kyoto, JP;
Kazuhisa Raita, Kyoto, JP;
Ichiro Yamane, Kyoto, JP;
Yoshitaka Kitao, Kyoto, JP;
Toshifumi Hamaguchi, Osaka, JP;
Takahiro Inauchi, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A differential amplifier circuit includes: a differential transistor pair composed of first and second transistors; a first resistance connected to a junction point of the first and second transistors at one terminal and to a first voltage node at the other terminal; second and third resistances provided between the first and second transistors, respectively, and a second voltage node; and first and second passive circuits respectively connected to the second and third resistances, the load characteristics of the passive circuits changing according to a control signal supplied. A ring oscillator is composed of a plurality of such differential amplifier circuits connected in a loop.