Second-Order Bandpass Filter Circuit (Nonideal Op-Amp)

** Circuit Description **

* op-amp subcircuit
.subckt nonideal_opamp 1 2 3
* connections:         | | |
*                 output | |
*                +ve input |
*                  -ve input           
Ricm+ 2 0 500Meg
Ricm- 3 0 500Meg
Rid 2 3 2Meg
Gm 0 4 2 3 0.19m
R1 4 0 1.323G
C1 4 0 30pF
Eoutput 5 0 4 0 1
Ro 5 1 75
.ends nonideal_opamp

** Main Circuit **
* input signal source
Vi 1 0 DC 0V AC 1V
* Tow-Thomas Biquad 
X_A1 3 0 2 nonideal_opamp
X_A2 5 0 4 nonideal_opamp
X_A3 7 0 6 nonideal_opamp
Rg 1 2 200k
R1 2 7 10k
R2 3 4 10k
R3 5 6 10k
R4 6 7 10k
Rd 2 3 200k
C1 2 3 1.59nF
C2 4 5 1.59nF
** Analysis Requests **
.AC LIN 100 8kHz 12kHz
** Output Requests **
.PLOT AC VdB(3) cph(v(3))
.probe
.end