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. 18, 1990
Filed:
Nov. 21, 1989
Masao Uehara, Hachioji, JP;
Katsuyoshi Sasagawa, Hachioji, JP;
Shinji Yamashita, Hachioji, JP;
Masahiko Sasaki, Hachioji, JP;
Katsuyuki Saito, Hachioji, JP;
Masahide Kanoo, Hachioji, JP;
Akinobu Uchikubo, Hachioji, JP;
Takehiro Nakagawa, Hachioji, JP;
Jun Hasegawa, Hino, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A charge detection circuit is capable of converting electrostatic charge quantities on a solid-state imaging chip into voltage signals of negative polarity. The voltage signals of the negative polarity are suppled to a DC-coupled polarity inversion circuit which inverts the polarity of the signals and amplifies the signals. In consequence, the generation of heat in the transistor of the outpout stage is reduced so as to suppress undesirable temperature rise of the solid-state imaging chip.