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. 23, 2002
Filed:
Nov. 30, 2000
Nai-Yin Sung, Hsinchu, TW;
Tsung-Yi Wu, Chang-Hua, TW;
Meng-Fan Chang, Taipei, TW;
Hsien-Te Chen, Hsin-Chu, TW;
Taiwan Semiconductor Manufacturing Co., Ltd, Hsin Chu, TW;
Abstract
A BIST controller and a separate measurement circuit are used to determine the maximum time period for accessing data stored in an embedded integrated circuit memory. The BIST controller includes a finite state controller for controlling the state of said BIST, a pattern generator for generating a patterned stimulus to be applied to the memory, and a comparator for comparing the response of said memory to said stimulus, to a reference response. The measurement circuit includes a pair of logic circuits for respectively operating on “1's” and “0's” data read from the memory, and a plurality of time delay elements that introduce time delays in the data prior to delivery to the logic circuits.