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:
Jan. 06, 2009
Filed:
Dec. 04, 2006
Zhibin Cheng, Cary, NC (US);
Zhibin Cheng, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A device and method for automatically detecting and optimally compensating die leakage current under a wide range of leakage conditions. A variable or reconfigurable (self-adaptive) keeper tracks current leakage online (in real time). The control input to the keeper is coupled to a leakage current sensor, which is in turn coupled to a dummy cell that generates the exact leakage current as the load. The current sensor regulates the control input in real time to produce a leakage compensation enable signal, which reconfigures and/or varies the strength of the keeper. Having the compensation capability of a strong keeper during elevated conditions and the capability of a weaker keeper during normal operational conditions, the self-adaptive keeper system offers high read/write performance, flexibility and circuit robustness in real time.