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. 17, 2003
Filed:
Mar. 10, 2000
Fuyuki Okamoto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The solid state imaging device comprising active pixels has a structure in which transistors for amplification and which amplify an output signal of a photodiode composing a photoelectric conversion portion are constituted as a voltage follower. By using the transistors for amplification and having a voltage follower structure, a gain of amplifying a signal from each pixel is made unity, and an amplification gain can be larger than that of an amplification circuit having a conventional source follower structure. Thereby, noise immunity is improved. Also, by inserting switching transistors corresponding to row selecting transistors, circuit symmetry of a differential amplifier circuit can be improved.