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:
Jun. 05, 2018
Filed:
Apr. 21, 2016
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventor:
Bo-Jr Huang, Hsinchu, TW;
Assignee:
MEDIATEK INC., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/03 (2006.01); H03K 5/19 (2006.01); G01R 31/26 (2014.01);
U.S. Cl.
CPC ...
H03K 5/19 (2013.01); G01R 31/2621 (2013.01); H03K 3/0315 (2013.01);
Abstract
A ring oscillator includes a plurality of inverters. A closed loop structure is formed by cascading the inverters. The inverter includes at least one sensitive inverter with a diode-connected transistor. A variation in an MOSFET (Metal Oxide Semiconductor Field Effect Transistor) threshold voltage of the ring oscillator is detected by analyzing the oscillation frequency of the ring oscillator.