Phase-frequency detector with charge pump - TSMC BiCMOS SiGe 180 nm

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 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.
Reference frequency 0.32..10 MHz.
The block is fabricated on TSMC 0.18 um SiGe BiCMOS technology.

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