OPSUM.CIR - OPAMP SUMMING AMPLIFIER * * SINEWAVE 4KHZ V1 1 0 SIN(0V 1VPEAK 4KHZ) * DC OFFSET V2 2 0 DC -5V * SQUARE WAVE 100HZ *V_2 2 0 PWL(0MS 1V 5MS 1V 5.01MS -1V 10MS -1V) * TRIANGLE WAVE 500HZ *V_3 3 0 PWL(0MS -1V 1MS 1V 2MS -1V 3MS 1V 4MS -1V * + 5MS 1V 6MS -1V 7MS 1V 8MS -1V 9MS 1V 10MS -1V) * * INPUT Rs R1 1 10 10K *R2 2 10 10K *R3 3 10 10K * FEEDBACK R RF 11 10 10K * * OPAMP XOP 0 10 11 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 BW PRODUCT = 10MHZ * DC GAIN (100K) AND POLE 1 (100HZ) EGAIN 3 0 1 2 100K RP1 3 4 1K CP1 4 0 1.5915UF * OUTPUT BUFFER AND RESISTANCE EBUFFER 5 0 4 0 1 ROUT 5 6 10 .ENDS * * ANALYSIS .TRAN 0.05MS 10MS * VIEW RESULTS .PROBE .END