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:
Oct. 15, 2019
Filed:
Sep. 18, 2017
Renesas Electronics Corporation, Tokyo, JP;
Mitsuhiko Igarashi, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A ring oscillator for detecting a characteristic degradation of MOSFETs is required to be highly sensitive to NBTI degradation or PBTI degradation. A semiconductor device comprises a ring oscillator and a delay detecting circuit which detects a delay through gate circuits based on the oscillation frequency of the ring oscillator. The ring oscillator comprises an input terminal to which an oscillation control signal is input, an output terminal which outputs an oscillation signal, an oscillation control gate circuit having a first input terminal which is coupled to the input terminal and a second input terminal to which a terminal different from the input terminal is coupled, NAND circuits, and NOR circuits. The NAND and NOR circuits are cascade coupled alternately, plural inputs of the NAND circuits and of the NOR circuits are coupled together, and drive power of the NAND circuits differs from drive power of the NOR circuits.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile