Charge pump circuit and phase-locked loop

A charge pump circuit, comprising a start module, a bias module, a current mirror module, a charging and discharging feedback control module and a charging and discharging matching module electrically connected in sequence;

• wherein
• the start module is configured to start the bias module;
• the bias module is configured to generate a constant bias current and output the bias current to the current mirror module;
• the current mirror module is configured to receive the bias current, amplify the bias current and output the amplified bias current in two paths;
• the charging and discharging feedback control module is configured to detect a output voltage of a charge pump, and control, according to feedback of the output voltage, a charging current or discharging current in the charging and discharging matching module, so as to suppress mismatch between the charging current and the discharging current;
• and
• the charging and discharging matching module is configured to receive an external charging control signal or an external discharging control signal, so as to charge or discharge a output load of the charge pump.