Digital fingerprint generation circuit, generation method and electronic device
AssigneesBeijing BOE Technology Development Co., Ltd., Boe Technology Group Co., Ltd.
InventorsXiangye Wei, Liming Xiu
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Abstract
Embodiments of the present disclosure provide a circuit and a method for digital fingerprint generation, and an electronic device. The digital fingerprint generation method includes inputting an input signal from outside; generating a frequency relationship indication signal between an input signal and a feedback signal; generating a frequency control signal based on the frequency relationship indication signal; generating an intermediate signal based on a 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.
Claims18
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.
A digital fingerprint generation method, comprising:
- inputting an input signal from outside;
- generating a frequency indication signal indicating whether a frequency of the input signal is larger than a frequency of a feedback signal;
- generating a frequency control signal based on the frequency 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,
- 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 a digital control oscillator sub-circuit.
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 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.
Dependencies are inferred from the claim text.