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:
Nov. 16, 2010
Filed:
May. 28, 2008
Tsuyoshi Matsushita, Osaka, JP;
Koji Oka, Osaka, JP;
Junichi Naka, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A plurality of analog signals are input to input terminals of an analog signal processing circuit ANAvia respective capacitors C. In a bias circuit Bias for supplying a bias voltage such as a signal ground of the analog signals to the analog signal processing circuit ANA, in an operational amplifier OpAS, a bias voltage VIr is input from a non-inverting input VIP of a built-in differentiate amplifier circuit, an output terminal of the built-in output amplifier circuit OAis connected to an inverting input terminal VIM of the differentiate amplifier circuit DA, and thereby a voltage follower is obtained. Furthermore, a plurality of output amplifier circuits OAthrough OAn are provided so that input terminals thereof are connected to output terminals of the differential amplifier circuit DA, and the output terminals are connected to input terminals INthrough INn of the analog signal processing circuit ANA