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. 18, 2004
Filed:
Jul. 16, 2002
Katsuji Satomi, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
N-channel MOS transistors are connected to bit lines so as to correspond to the data to be read out. A constant current outputting circuit uses an off leakage current of load transistors similar to the N-channel MOS transistors as a reference current to constitute a current mirror circuit having a mirror ratio according to the number of the N-channel MOS transistors connected to each bit line. P-channel MOS transistors of the constant current outputting circuit are connected to the bit lines and supply a current according to the off leakage currents of the N-channel MOS transistors. Thus, malfunctions caused by such as off leakage currents of transistors or the like can be reliably prevented without causing an increase in access time.