diode_va_characteristic.ngjs

#!/usr/bin/env ngspicejs
// Compare VA characteristic, timing and AC of 2 diodes
// linter: ngspicejs-lint
"use strict";

function compare_diodes(aModel1, aModel2) {
    // Compare 2 diodes
    // V-A characteristic
    netlist_clear();
    pwl('U1', 1, 0).shape([[0, 0], [0.02, 3]]);
    resistor('R1', 1, 2, 330);
    var d1 = diode('D1', 2, 0, aModel1);
    var t1 = tran().run();
    d1.model(aModel2);
    var t2 = tran().run();
    // log
    chart_xy()
        .title('V-A characteristic of diodes')
        .label_x('Vf/V')
        .label_y('If/A')
        .log_y(true)
        .add_series(t1.data['V(2)'].slice(2), t1.data['I(U1)'].slice(2).scale(-1), aModel1)
        .add_series(t2.data['V(2)'].slice(2), t2.data['I(U1)'].slice(2).scale(-1), aModel2)
        .show();
    // linear
    chart_xy()
        .height(204)
        .title('V-A characteristic of diodes')
        .label_x('Vf/V')
        .label_y('If/A')
        .add_series(t1.data['V(2)'].slice(2), t1.data['I(U1)'].slice(2).scale(-1), aModel1)
        .add_series(t2.data['V(2)'].slice(2), t2.data['I(U1)'].slice(2).scale(-1), aModel2)
        .show();
    // timing
    netlist_clear();
    square('U1', 1, 0).v(2).f('1M');
    resistor('R1', 1, 2, 100);
    d1 = diode('D1', 2, 0, aModel1);
    t1 = tran().step('5n').interval('5u').run();
    d1.model(aModel2);
    t2 = tran().step('5n').interval('5u').run();
    chart_xy()
        .height(204)
        .title('Timing at 1MHz')
        .add_series(t1.data.time, t1.data['V(2)'], aModel1)
        .add_series(t2.data.time, t2.data['V(2)'], aModel2)
        .show();
    // ac with series inductor
    netlist_clear();
    sinewave('U1', 1, 0).v(2).f('1M');
    resistor('R1', 1, 3, 100);
    inductor('L1', 3, 2, '1m');
    d1 = diode('D1', 2, 0, aModel1);
    var a1 = ac().fstop('2M').run();
    d1.model(aModel2);
    var a2 = ac().fstop('2M').run();
    chart_xy()
        .height(204)
        .title('AC with 1mH series inductor')
        .add_series(a1.data.frequency, a1.data['V(2)'].modulus(), aModel1)
        .add_series(a2.data.frequency, a2.data['V(2)'].modulus(), aModel2)
        .show();
}

compare_diodes('1N5399', 'FR107');