A High-Speed and Low-Noise Charge Pump for PLL

This paper introduces a high-speed and low-noise charge pump for phase-locked loop. The use of low-voltage switch increases the turn-on and turn-off speed and charge pump can operate at 300 MHz. The output current range of the charge pump is 2-30mA in 2mA steps and the current mismatch less than 0.5%. The phase noise is -223.2 dBA/Hz@1MHz at 2 mA and -206.6 dBA/Hz@10KHz at 30 mA.