bootstrap_amplifier_1000x.ngjs

#!/usr/bin/env ngspicejs
// Bootstrap amplifier 1000x gain, 2.5mA consumption, muddy AC
// linter: ngspicejs-lint
"use strict";

battery('U1', 13, 0, 9);
ammeter('A1', 13, 8);
resistor('R1', 8, 9, '6k8');
resistor('R2', 9, 10, '6k8');
resistor('R3', 4, 5, '2k2');
resistor('R4', 5, 0, '250');
resistor('R5', 11, 0, '50k');
capacitor('C1', 5, 0, '220u');
capacitor('C2', 9, 4, '100u');
capacitor('C3', 4, 11, '4u7');
npn('T1', 10, 5, 6, 'BC547');
npn('T2', 8, 10, 4, 'BC547');
pickup('L1', 6, 0).l('1m').v('200u').rs(8).cp('2p').f(440).damping(0);

var t = tran().run().chart('V(11)');
echo('Current consumption', t.data['I(A1)'].avg().toEng());
echo('Gain', t.gain(6, 11).toFixed(1));
echo('Gain ideal', t.gain_ideal('200u', 11).toFixed(1));

battery_sensitivity('U1', 6, 11, 1, 15).run().chart({min_x: 0}).last_chart.gif('bat_sens_bootstrap.gif');

ac().run().chart('V(11)');