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. 24, 2019
Filed:
Dec. 26, 2014
Southeast University, Jiangsu, CN;
SOUTHEAST UNIVERSITY, Jiangsu, CN;
Abstract
A process corner detection circuit based on a self-timing ring oscillator comprises a reset circuit (), the self-timing oscillation ring (), and a counting module (). The self-timing ring oscillator () consists of m two-input Muller C-elements and inverters, and a two-input AND gate, m being a positive integer greater than or equal to 3. The circuit can be used for detecting a process corner of a fabricated integrated circuit chip, and reflecting the process corner of the chip according to the number of oscillations of the self-timing ring oscillator (). The number of oscillations of the self-timing ring oscillator () in different process corners is acquired by Hspice simulation before the chip tape-out, and the process corner of the chip after the chip tape-out can be determined according to the actually measured number of oscillations.