* series parallel riaa circuit
v1 vsigin 0 dc 0 ac 1 sin 0 1.414213562V 1kHz
x1 vsigin vsigout 0 riaasp
rl vsigout 0 47k
.subckt riaasp vin vout vref
rin vin vn 12.77777778K
r1 vout net1 11.77777778meg
c1 vout net1 270p
r2 net1 vn 1meg
c2 net1 vn 75p
* ideal op amp
eopamp vout vref vref vn 1E6
.ends riaasp
.end
.control
set units=degrees
ac dec 25 10Hz 40khz
setplot ac1
plot vdb(vsigout)
pz vsigin 0 vsigout 0 vol pz
echo print time constants
print 1/pole
print 1/zero[0]
.endc