US 11,777,541 B2
Digital fingerprint generation circuit, generation method and electronic device
Xiangye Wei, Beijing (CN); and Liming Xiu, Beijing (CN)
Assigned to BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO. , LTD., Beijing (CN)
Filed by Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed on May 26, 2021, as Appl. No. 17/330,561.
Claims priority of application No. 202010788358.0 (CN), filed on Aug. 7, 2020.
Prior Publication US 2022/0045703 A1, Feb. 10, 2022
Int. Cl. H04B 1/04 (2006.01); G06F 9/30 (2018.01); G06F 1/10 (2006.01)
CPC H04B 1/0475 (2013.01) [G06F 1/10 (2013.01); G06F 9/30101 (2013.01); H04B 2001/0491 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A digital fingerprint generation circuit, comprising:
a pulse generation sub-circuit configured to generate a plurality of pulse signals;
a digital control oscillator sub-circuit configured to generate an intermediate signal based on a frequency control signal and the plurality of pulse signals;
a frequency dividing sub-circuit configured to divide the intermediate signal in frequency to generate a feedback signal;
a frequency and phase detection sub-circuit configured to generate a digital fingerprint based on an input signal and the feedback signal, and further configured to generate a frequency indication signal indicating whether a frequency of the input signal is larger than a frequency of the feedback signal; and
a control sub-circuit configured to generate the frequency control signal based on the frequency indication signal,
wherein the input signal is a signal generated by a pulse generator, and
wherein the input signal has a frequency not within an operating frequency range of the digital control oscillator sub-circuit.