// Test circuit for phase-frequency detectors

simulator lang=spectre

ahdl_include "pfd_cp.va"

Vref (ref 0) vsource type=pulse period=1/1MHz
Vvco (vco 0) vsource type=pulse period=1/(1MHz+50kHz)
PFD1  (out1 ref vco) pfd_cp1 vh=1 vl=0 iout=100uA dir=-1 td=300ns tt=1ns
PFD2  (out2 ref vco) pfd_cp2 vh=1 vl=0 iout=100uA dir=-1 td=300ns tt=1ns jitter=50ns
R1    (out1 0) resistor r=10k
R2    (out2 0) resistor r=10k

resp tran stop=20uS