Digital fingerprint generation circuit, generation method and electronic device

A digital fingerprint generation method, comprising:

• inputting an input signal from outside;
• generating a frequency relationship indication signal between the input signal and a feedback signal;
• generating a frequency control signal based on the frequency relationship indication signal;
• generating an intermediate signal based on the frequency control signal and pulse signals;
• dividing the intermediate signal in frequency to generate the feedback signal;
• and
• generating a digital fingerprint based on the input signal and the feedback signal.

An electronic device, comprising:

• a digital fingerprint generation circuit, wherein the digital fingerprint generation circuit comprises:
• 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 relationship indication signal between the input signal and the feedback signal;
• and
• a control sub-circuit configured to generate the frequency control signal based on the frequency relationship indication signal.