Suppose, for a robust high-speed PLL using an XOR PD, that it desirable to adjust the PD's gain. Show a charge pump can be used towards this goal. Should the loop filter have two outputs? Discuss the...

Suppose, for a robust high-speed PLL using an XOR PD, that it desirable to adjust the PD's gain. Show a charge pump can be used towards this goal. Should the loop filter have two outputs? Discuss the PD's gain and how it would be adjusted. What topology would be used for a passive loop filter? for an active loop filter?