Patent ID: 11940471
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A chip comprising:
a power management unit; and
a voltage attack detection circuit, comprising:
at least one voltage regulation circuit, wherein the at least one voltage regulation circuit is connected to an external supply, the at least one voltage regulation circuit is configured to convert the external supply to at least one internal supply respectively, and the at least one internal supply is configured to output at least one first voltage respectively;
at least one voltage sensor and at least one glitch sensor, wherein each voltage sensor in the at least one voltage sensor is connect to one of the at least one voltage regulation circuit and configured to receive one of the at least one first voltage respectively, and configured to output at least one first signal respectively, the at least one first signal is configured to indicate whether the at least one internal supply is under voltage attack of a first duration within a first range and a first attack strength within a second range respectively, each glitch sensor in the at least one glitch sensor is connect to one of the at least one voltage regulation circuit and configured to receive one of the at least one first voltage respectively, and configured to output at least one second signal respectively, the at least one second signal is configured to indicate whether the at least one internal supply is under voltage attack of a second duration within a third range and a second attack strength within a fourth range respectively, a minimum value of the first range is greater than or equal to a maximum value of the third range, and an absolute value of a maximum value of the second range is less than or equal to an absolute value of any value of the fourth range;
wherein the power management unit is connected to the voltage attack detection circuit, and the voltage attack detection circuit is configured to detect whether a supply voltage of the power management unit is under voltage attack.