// Test circuit for phase-frequency detectors

simulator lang=spectre

ahdl_include "pfd_cp.va"

Vref (ref 0) vsource type=sine freq=1MHz ampl=1
Vvco (vco 0) vsource type=sine freq=1MHz ampl=1 fmmodindex=1 fmmodfreq=50kHz
PFD1  (out1 ref vco) pfd_cp1 vh=1 vl=-1 iout=100uA dir=1 td=0 tt=1ns
PFD2  (out2 ref vco) pfd_cp2 vh=1 vl=-1 iout=100uA dir=-1 td=300ns tt=1ns jitter=50ns
R1    (out1 0) resistor r=10k
R2    (out2 0) resistor r=10k
PFD3  (out3 ref vco) pfd_cp1 vh=1 vl=-1 iout=100uA dir=1 td=0 tt=1ns
PFD4  (out4 ref vco) pfd_cp2 vh=1 vl=-1 iout=100uA dir=-1 td=300ns tt=1ns jitter=50ns
C1    (out3 0) capacitor c=25pF
C2    (out4 0) capacitor c=25pF

resp tran stop=20uS errpreset=conservative