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:
Sep. 19, 2017
Filed:
Sep. 25, 2014
Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu, TW;
Jinn-Yeh Chien, Chu Bei, TW;
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu, TW;
Abstract
An integrated circuit includes a first circuit and a test circuit. The test circuit is configured to test the timing of a first circuit. The first circuit includes a plurality of flip-flops and a plurality of data paths. Each data path of the plurality of data paths is connected to one or more of the plurality of flip-flops. The test circuit includes a plurality of loopback paths, a controller, a multiplexer connected to the plurality of loopback paths and a counter connected to the multiplexer. The controller is configured to select a path from the plurality of loopback paths and the plurality of data paths. The multiplexer is configured to selectively output a first signal including an oscillation frequency. The first signal is applied to the selected path and the counter is configured to measure the oscillation frequency of the first signal.