Patent · US Active

Clock glitch alerting circuit

US11018657B1 · kind B1 · utility

5Cited by

2References

20Claims

0Family size

Assignee

NXP USA, Inc. · US

Inventors

Rohit Kumar Sinha · Noida, IN
Stefan Doll · Obermoschel, DE
Neha Srivastava · New Delhi, IN

Key dates

Filing date	Dec 28, 2020
Grant date	May 25, 2021
Priority date	—
Expiry date	Dec 28, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2005/00019
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A clock glitch alerting circuit is configured to detect a glitch in an input clock signal, and activate and provide an alert signal to a security controller when the glitch is detected. The clock glitch alerting circuit is further configured to delay the input clock signal based on multiple selection signals, and provide one of a delayed clock output signal and a filtered clock output signal to the security controller based on the alert signal. The clock glitch alerting circuit is further configured to generate and provide a count value to the security controller that indicates a time duration available by the security controller to execute a security critical operation after receiving the activated alert signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.