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. 22, 2020
Filed:
Dec. 13, 2018
Renesas Electronics Corporation, Tokyo, JP;
Yuko Kitaji, Kodaira, JP;
Kazuki Fukuoka, Kodaira, JP;
Ryo Mori, Kodaira, JP;
Toshifumi Uemura, Kodaira, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A semiconductor device includes a voltage sensor which samples a power supply voltage at a speed faster than fluctuations in the power supply voltage and encodes the power supply voltage into a voltage code value. A voltage drop determination circuit detects a voltage drop based on the voltage code value, and a clock control circuit generates a clock. The clock control circuit stops the clock when the voltage drop determination circuit detects the voltage drop. The voltage drop determination circuit includes a prediction computation circuit which looks ahead a voltage value from a history of the voltage code value and predicts a variation value, and the prediction computation circuit includes a circuit for masking a prediction value if a differential value of the prediction value is continuously negative for a predetermined cycle.