Active low-pass filter of fifth-order

electric_low_pass.h

#ifndef ELECTRICAL_H
#define ELECTRICAL_H

#include <systemc-ams>
using namespace std;
using namespace sc_core;

SC_MODULE(lowpass)
{
	/* TDF I/O ports for data to be read in/out from TDF modules*/
	sca_tdf::sca_in<double> input;
	sca_tdf::sca_out<double> output;

	/* TDF-ELN, ELN-TDF converter voltage sources */
	sca_eln::sca_tdf::sca_vsource v_in;
	sca_eln::sca_tdf::sca_vsink v_out;

	/* Ideal OP-AMPS */
	sca_eln::sca_nullor nullr0;
	sca_eln::sca_nullor nullr1;
	sca_eln::sca_nullor nullr2;

	/*Capacitors*/
	//vector<sca_eln::sca_c> c = vector<sca_eln::sca_c>(5);
	sca_eln::sca_c c0, c1, c2, c3, c4;

	/* Resistors */
	//vector<sca_eln::sca_r> r = vector<sca_eln::sca_r>(5);
	sca_eln::sca_r r0, r1, r2, r3, r4;

	/* Electrical netlist nodes */
	vector<sca_eln::sca_node> n = vector<sca_eln::sca_node>(10);

	/* Ground node*/
	sca_eln::sca_node_ref gnd;

	/* Set I/O port parameters */
	void set_attributes()
	{
		input.set_rate(1);
		output.set_timestep(1.0, SC_US);
		output.set_rate(1);
	}

	/*Constructor */
	SC_CTOR(lowpass): v_in("v_in", 1.0), v_out("v_out", 1.0), nullr0("nullr0"), nullr1("nullr1"), nullr2("nullr2"), c0("c0", 1.0E-6), 
		c1("c1", 1.0E-6),
		c2("c2", 2.5E-6),
		c3("c3", 1.0E-6),
		c4("c4", 15.0E-6),
		r0("r0", 2650.0),
		r1("r1", 3697.0),
		r2("r2", 763.0),
		r3("r3", 1210.0),
		r4("r4", 390.0)
	{
		v_in.inp(input); v_in.p(n.at(0)); v_in.n(gnd);
		v_out.outp(output); v_out.p(n.at(8)); v_out.n(gnd);
		nullr0.nip(n.at(1)); nullr0.nin(n.at(2)); nullr0.nop(n.at(2)); nullr0.non(gnd);

		r0.p(n.at(0)); r0.n(n.at(1));
		c0.p(n.at(1)); c0.n(gnd);

		r1.p(n.at(2)); r1.n(n.at(3)); r2.p(n.at(3)); r2.n(n.at(4));

		nullr1.nip(n.at(4)); nullr1.nin(n.at(5)); nullr1.nop(n.at(5)); nullr1.non(gnd);

		c1.p(n.at(3)); c1.n(n.at(5));
		c2.p(n.at(4)); c2.n(gnd);

		r3.p(n.at(5)); r3.n(n.at(6));  
		r4.p(n.at(6)); r4.n(n.at(7)); 
		
		nullr2.nip(n.at(7)); nullr2.nin(n.at(8)); nullr2.nop(n.at(8)); nullr2.non(gnd);
		c3.p(n.at(6)); c3.n(n.at(8));
		c4.p(n.at(7)); c4.n(gnd);

	}

	~lowpass(){}
};

#endif