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87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
/*
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* opamp.c
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*
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*/
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#include "netlist/devices/net_lib.h"
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NETLIST_START(main)
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/* Standard stuff */
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CLOCK(clk, 1000) // 1000 Hz
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SOLVER(Solver, 48000)
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//PARAM(Solver.ACCURACY, 1e-3)
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//PARAM(Solver.CONVERG, 1.0)
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//PARAM(Solver.RESCHED_LOOPS, 30)
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/* Opamp wired as impedance changer */
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SUBMODEL(op, opamp)
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NET_C(op.GND, GND)
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NET_C(op.PLUS, clk)
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NET_C(op.MINUS, op.OUT)
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SUBMODEL(op1, opamp)
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/* Wired as inverting amplifier connected to output of first opamp */
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RES(R1, 100000)
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RES(R2, 200000)
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NET_C(op1.GND, GND)
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NET_C(op1.PLUS, GND)
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NET_C(op1.MINUS, R2.2)
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NET_C(op1.MINUS, R1.2)
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NET_C(op.OUT, R1.1)
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NET_C(op1.OUT, R2.1)
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RES(RL, 1000)
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NET_C(RL.2, GND)
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NET_C(RL.1, op1.OUT)
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LOG(logX, op1.OUT)
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//LOG(logY, clk)
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NETLIST_END()
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NETLIST_START(opamp)
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/* Opamp model from
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*
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* http://www.ecircuitcenter.com/Circuits/opmodel1/opmodel1.htm
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*
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* Bandwidth 10Mhz
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*
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*/
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/* Terminal definitions for calling netlists */
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ALIAS(PLUS, G1.IP) // Positive input
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ALIAS(MINUS, G1.IN) // Negative input
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ALIAS(OUT, EBUF.OP) // Opamp output ...
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ALIAS(GND, EBUF.ON) // GND terminal
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/* The opamp model */
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VCCS(G1)
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PARAM(G1.G, 100) // typical OP-AMP amplification 100 * 1000 = 100000
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RES(RP1, 1000)
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CAP(CP1, 1.59e-6) // <== change to 1.59e-3 for 10Khz bandwidth
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VCVS(EBUF)
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PARAM(EBUF.RO, 50)
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PARAM(EBUF.G, 1)
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// NET_C(EBUF.ON, GND)
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NET_C(G1.ON, GND)
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NET_C(RP1.2, GND)
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NET_C(CP1.2, GND)
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NET_C(EBUF.IN, GND)
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NET_C(RP1.1, G1.OP)
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NET_C(CP1.1, RP1.1)
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NET_C(EBUF.IP, RP1.1)
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NETLIST_END()
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