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:
Apr. 28, 2009
Filed:
Apr. 09, 2007
Mutsuo Nishikawa, Matsumoto, JP;
Katsumichi Ueyanagi, Matsumoto, JP;
Katsuyuki Uematsu, Hata-machi, JP;
Yuko Fujimoto, Toyama, JP;
Mutsuo Nishikawa, Matsumoto, JP;
Katsumichi Ueyanagi, Matsumoto, JP;
Katsuyuki Uematsu, Hata-machi, JP;
Yuko Fujimoto, Toyama, JP;
Fuji Electric Device Technology Co., Ltd., Tokyo, JP;
Abstract
A signal amplifier circuit includes a negative feedback amplifier circuit having an output terminal, a first voltage limiting device for limiting the output voltage from the negative feedback amplifier circuit, a second voltage limiting device for limiting the output voltage from the negative feedback amplifier circuit, a first reference voltage supply applying a first reference voltage to the first voltage limiting device, a second reference voltage supply applying a second reference voltage to the second voltage limiting device. The first voltage limiting device is configured to fix a lower limit saturation voltage at the first reference voltage. The second voltage limiting device is configured to fix an upper limit saturation voltage at the second reference voltage.