Patent ID: 11949423
Assignee: FARADAY TECHNOLOGY CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A clock and data recovery device, comprising:
a first phase detector, receiving a data signal and a first output signal, and generating a first phase state signal according to the data signal and the first output signal;
a pulse filter, coupled to the first phase detector, adjusting the first phase state signal according to a capacitance of a loop capacitor to generate a filtered signal;
a second phase detector, receiving a reference clock signal and generating a second phase state signal according to the reference clock signal;
a first multiplexer, selecting the second phase detector or the pulse filter according to a lock signal;
a second multiplexer, selecting the first phase detector or the second phase detector according to the lock signal;
a charge pump, coupled to the first multiplexer, generating a pumping signal according to the second signal or the third pulse signal;
a loop filter, comprising the loop capacitor, generating a control signal according to the pumping signal; and
a voltage-controlled oscillator, generating a second output signal and adjusting a frequency of the second output signal according to the control signal, wherein the first output signal is generated according to the second output signal.