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:
Jul. 04, 2017
Filed:
Jun. 01, 2016
Taiwan Semiconductor Manufacturing Co., Ltd., Hsinchu, TW;
Bing Wang, Palo Alto, CA (US);
TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD., Hsinchu, TW;
Abstract
An interface circuit is provided. A NMOS transistor is coupled between a first bit line and a ground. A logic gate is coupled between a gate of the NMOS transistor and a second bit line. A keeper controls a voltage level of the second bit line according to a reference voltage. A tracking circuit includes a plurality of reference bit cells and a pull-up device coupled to a reference bit line. Each reference bit cell is coupled to a read word line. When a bit cell coupled to the second bit line is accessed by a specific read word line, the reference bit cell coupled to the specific read word line drains a current from the pull-up device. The tracking circuit provides the reference voltage according to the current.