electret_mic.ngjs

#!/usr/bin/env ngspicejs
// Show that electret mic is passive and needs some power
// linter: ngspicejs-lint
"use strict";

battery('U1', 3, 0, 9);
var r1 = resistor('R1', 3, 2, '10k');
capacitor('C1', 2, 5, '100n');
resistor('R2', 5, 0, '50k');
electret_mic('MIC1', 2, 0).v('10m').f(440);
echo_netlist();

var t = tran().start('10m').run().chart('V(5)');
echo('Voltage swing with 10k resistor: ' + t.data['V(5)'].range().toEng());

r1.r('10M');
t = tran().start('10m').run();
echo('Voltage swing with 10M resistor: ' + t.data['V(5)'].range().toEng(), '(electret needs external power)');