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:
Aug. 29, 2017
Filed:
Sep. 29, 2014
Microsemi Solutions (U.s.), Inc., Aliso Viejo, CA (US);
Howard Shih Hao Chang, Vancouver, CA;
Microsemi Solutions (U.S.), Inc., Aliso Viejo, CA (US);
Abstract
A voltage detector to detect the voltage level of a switched power supply associated with a power gated region of an integrated circuit. The voltage detection circuit, which can be described as a modified Schmitt trigger circuit, comprises PMOS and NMOS transistors, and an added stack of NMOS transistors to set the output to a value of 1 in response to detection of an input voltage at the input greater than an operational voltage of the switched power supply, for example approximately 80% VDD and above. A pull-down circuit actively pulls the circuit output low before the circuit input drops below the low input threshold. Optional additional NMOS transistors provide the capability to adjust the threshold. The voltage detector circuit can be calibrated and used to detect whether or not the switched power supply associated with a power gated design has reached its operational voltage level.