OPITOV_OFFSET.CIR - CURRENT-TO-VOLTAGE CONVERTER (TRANSIMPEDANCE AMP) * * INPUT CURRENT IS 0 1 AC 1 PWL(0US 0MA 100US -1MA) * * OFFSET VOLTAGE V1 10 0 DC 5VDC R1 10 1 10K * * TRANSIMPEDANCE AMPLIFIER RF 1 2 10K XOP1 0 1 2 OPAMP1 * * OPAMP MACRO MODEL, SINGLE-POLE * connections: non-inverting input * | inverting input * | | output * | | | .SUBCKT OPAMP1 1 2 6 * INPUT IMPEDANCE RIN 1 2 10MEG * gain bandwidth product = DCGAIN x POLE1 = 10MHZ * DCGAIN=100K AND POLE1=100HZ EGAIN 3 0 1 2 100K R1 3 4 1K C1 4 0 1.5915UF * OUTPUT BUFFER AND RESISTANCE EBUFFER 5 0 4 0 1 ROUT 5 6 10 .ENDS * * ANALYSIS .TRAN 0.2US 100US .PROBE .END