* 3 stage transistor amplifier with low frequency boost * BO 15 70 50.0 .5 5000000. (bode plot of node 15, 70 lines, 50 dB scale, .5 Hz to 5 MHz) VS 1 0 0.1 0 (voltage source to node 1, .1 volts at angle 0 degrees) RC 1 2 0 75.0E-06 75 uf cap from node 1 to node 2 R 2 3 15000.0 0 15000 ohm resistor from node 2 to node 3 R 2 0 5000. 0 RC 3 0 620.0 .50E-06 series 620 ohm resistor and .5 uf capacitor from node 3 to ground RC 3 5 0 35.0E-06 TR 4 5 6 200. (transistor: emitter, base, collector nodes, hfe=200 current gain) R 5 0 10600. 0 R 4 7 220.0 0 R 7 0 2200. 0 RC 7 0 0 200.E-06 R 6 0 10000. 0 RC 6 0 0 .001E-06 RC 6 9 0 20.0E-06 TR 8 9 10 200. R 8 0 220. 0 R 10 0 6800. 0 R 9 11 12000. 0 R 11 0 220. 0 R 11 12 470. 0 RC 12 0 0 1500.E-06 R 12 13 47. 0 TR 13 10 14 200. R 14 0 680. 0 RC 14 15 0 300.E-06 R 15 0 500. 0