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:
May. 06, 2003
Filed:
Mar. 10, 2000
Shiro Dosho, Osaka, JP;
Naoshi Yanagisawa, Osaka, JP;
Masayuki Ozasa, Osaka, JP;
Hidehiko Kurimoto, Osaka, JP;
Tatsuo Okamoto, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Fixed pattern noise of an analog memory is reduced. Transfer paths of an address selection signal (SL) between an address generation unit ( ) and respective storage elements ( ) for storing an analog signal are constructed to have a substantially uniform electric characteristic in driving the storage elements ( ) by the address selection signal (SL) to such an extent that the output signal of the analog memory is free from fixed pattern noise. A buffer unit ( ) for temporarily storing and outputting the address selection signal is provided between the address generation unit ( ) and the respective storage elements ( ), and the buffer unit ( ) is constructed to have an output characteristic substantially uniform between the storage elements ( ). Also, lines between the buffer unit ( ) and the storage elements ( ) are constructed to have substantially the same electric characteristic. In this manner, charge feed through noise of the respective storage elements ( ) are made substantially uniform, resulting in suppressing the fixed pattern noise.