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:
Aug. 31, 2004
Filed:
Jul. 03, 2002
Shiro Tsunai, Tokyo, JP;
Akira Uemura, Tokyo, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A voltage amplifying circuit ( ) that may have a selectable gain has been disclosed. Voltage amplifying circuit ( ) may include a voltage amplifier ( ) and a gain changing unit ( ). A gain changing unit ( ) may be capable of changing at least one of: a capacitance between a signal input terminal ( ) and an input terminal of a voltage amplifier, the capacitance between an input terminal of a voltage amplifier and a ground (or reference potential), and a capacitance between an input and an output terminal ( ) of a voltage amplifier. In this way, a gain from a signal input terminal ( ) to an output terminal ( ) of a voltage amplifier of a voltage amplifying circuit ( ) may be changed.