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:
Jun. 24, 2008
Filed:
May. 09, 2006
Shinichi Miyamoto, Osaka, JP;
Yousuke Kuroiwa, Osaka, JP;
Masaya Ueda, Osaka, JP;
Hideo Fukuda, Kyoto, JP;
Hiroshi Yamaguchi, Osaka, JP;
Masaki Taniguchi, Kyoto, JP;
Shinichi Miyamoto, Osaka, JP;
Yousuke Kuroiwa, Osaka, JP;
Masaya Ueda, Osaka, JP;
Hideo Fukuda, Kyoto, JP;
Hiroshi Yamaguchi, Osaka, JP;
Masaki Taniguchi, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An amplifier unit is provided, with which the need for manufacturing a photoelectric conversion IC in Bi-CMOS process is eliminated, and relatively low process cost of the photoelectric conversion IC is achieved. The input section of a buffer (the base of a transistor Q) is connected with a plurality of patterns of phase compensation circuits each including a resistor and a capacitor connected in series. A bipolar transistor (Q) is interposed between a positive power supply line and a capacitor (C) forming a capacitance of the phase compensation circuit. By switching on/off the bipolar transistor (Q), the capacitance value and resistance value of the phase compensation circuit are switched. Since the bipolar transistor (Q) is interposed between the capacitor (C) and the positive power supply line, base current (Isw) acting as a switch signal does not affect the amplifier unit.