Patent ID: 11893142
Assignee: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. The method according to claim 15, wherein the digital fingerprint generation circuit further comprises: a third clock generator and a fourth clock generator, wherein the control unit is further electrically coupled with the third clock generator and the fourth clock generator, and both of the third clock generator and the fourth clock generator are further electrically coupled with the frequency detector; the method further comprising:
generating a third control word and a fourth control word and transmitting the third control word to the third clock generator and the fourth control word to the fourth clock generator by the control unit;
generating a third clock signal based on the third control word and transmitting the third clock signal to the frequency detector by the third clock generator; and
generating a fourth clock signal based on the fourth control word and transmitting the fourth clock signal to the frequency detector by the fourth clock generator;
generating the digital fingerprint of the integrated circuit based on the first clock signal and the second clock signal by the frequency detector comprises:
generating the digital fingerprint of the integrated circuit based on any two of the first clock signal, the second clock signal, the third clock signal, and the fourth clock signal by the frequency detector;

wherein the first clock generator, the second clock generator, the third clock generator, and the fourth clock generator have different manufacturing deviations from each other, and both of the third control word and the fourth control word have an integer portion and a fraction portion.