* non-inverting series parallel riaa circuit with extra zero (3.18us) v1 vsigin 0 dc 0 ac 1 sin 0 1.414213562V 1kHz x1 vsigin vsigout 0 riaaspez rl vsigout 0 47k .subckt riaaspez vin vout vref r1 vout net1 217.173913k c1 vout net1 14.64264265n r2 net1 net2 17.67514356k c2 net1 net2 4.243247006n r3a net2 vn 761.7222 r3b vn vref 238.2778 * ideal op amp eopamp vout vref vin 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 .endc