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Phase-frequency detector with charge pump - TSMC BiCMOS SiGe 180 nm
180TSMC_PFD_02 is a phase-frequency detector (PFD) forms a control signal for VCO tuning. PFD compares phases of a divided VCO signal and a divided reference oscillator signal and detects phase difference. Charge pump (CP) generates pulses for the loop filter. The lock detector monitors the current status of PLL by comparing the phase difference of VCO divided signal and reference oscillator signal with required value. LD_MP<1:0> and LD_ACR outputs set the lock monitoring period and the lock detector accuracy, respectively.
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