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:
Apr. 25, 1995
Filed:
Dec. 18, 1992
Applicant:
Inventors:
Nobuhiko Itoh, Tenri, JP;
Makoto Ihara, Sakurai, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B / ; G11C / ;
U.S. Cl.
CPC ...
331 57 ; 331 65 ; 365222 ; 365227 ;
Abstract
A ring oscillator includes a plurality of inverters, a leakage current generating part, and a current controlling part. The current controlling part supplies the inverters with a source current in accordance with a value of a leakage current generated from the leakage current generating part. The leakage current generated from the leakage current generating part is correlated with a leakage current generated from a memory cell. The oscillating frequency of the ring oscillator can be varied in accordance with the leakage current generated from the leakage current generating part.