and vco 130 during wide band operation the output of the phase detector in pll ic 110 phase error output signal 118 may be of a charge pump type output that sources and sinks current as appropriate depending on the variations of the phase between reference signal 114 and feedback signal 116 wide band loop capacitor c w 121 in the wide band loop is charged by the current output from pll ic 110 and develops a potential voltage level proportional to the charge the voltage level is in turn monitored at the input to vco 130 wide band loop capacitor c w 121 is charged based on variations in phase error output signal 118 thereby smoothing the signal seen at the input to vco 130 the smoothing of phase error signal 118 results in a smooth progression of the frequency of vco output signal 132 toward the frequency of reference signal 114 the voltage level of wide band loop capacitor c w 121 is also monitored by charging circuit 140 charging circuit 140 sources or sinks current as appropriate to charge narrow band loop capacitor c n 137 to approximate the voltage developed across wide band loop capacitor c w 121 specifically operational amplifier 142 provides a current source through switch 150 to narrow band loop capacitor c n 137 operational amplifier 142.