Hi all,

I have made verilog-A model of switches and using them in the circuit to perform simulation. Here spectre gives me error like "too few terminals given (3<4)".

Here i have two types of switches one is 3 terminal switch (vin,vcontrol,vout) and other is four terminal switch (vref+,vref-,vcontrol,vout) .

Operation of 1st switch is simple if vcontrol>vth then switch closed else open. (vth is given as parameter in code)

Operation of second switch is
if vcontrol>vth vout=vref+
else vcontrol <vth vout=vref-

I made symbols of both n using in switched integrator circuit along with fully differential-opamp but giving the error as described above.

If switch2(four terminal switch) is removed spectre is not showing any error..... Any help on this would be appreciated

Thanks--
Fuzail