1 OPAMP MACRO MODEL, SINGLE-POLE
2 * connections: non-inverting input gnd
3 * | inverting input | vcc
6 .SUBCKT OPAMP1 1 2 6 20 40
10 * DC GAIN=100K AND POLE1=100HZ
11 * gain, centralise and clamp
21 * first pole: UNITY GAIN = DCGAIN X POLE1 = 10MHZ
25 * OUTPUT BUFFER AND RESISTANCE