On 26/12/2024 02:10, Tom via groups.io
      wrote:
    
    Having issues
      making a current source with limited voltage compliance for an
      ideal charge pump in a PLL circuit. The methods of clamping the
      Source max Vc using a diode and voltage source or Zener diode
      create spikes which disrupt the loop. VCCS or 2 terminal G source
      would work. 
    Did you try enabling "This is an active load" in the current source
    properties?
    
    --
    Regards,
    Tony