This Charge Pump PLL is designed in CMOS LP technology, using seven metallization levels.
These voltage pulses are converted to current pulses in the Charge Pump. These current pulses charge or discharge the Loop Filter to generate the control voltage for the VCO. The VCO generates a frequency (FVCO) proportional to this control voltage. This frequency is then divided by the Loop Frequency Divider, to generate FBCLK.