how_to_use_ac_analysis.ngjs

#!/usr/bin/env ngspicejs
// How to use small singal AC analysis
// linter: ngspicejs-lint
"use strict";

// RC filter
sinewave('U1', 1, 0).v(1).f(100);
resistor('R1', 1, 2, 100);
capacitor('C1', 2, 0, '100n');

// Run AC from 16Hz to 50kHz and show chart of V(2) in volts and decibels
var a = ac().fstop("50k").run().chart("V(2)").chart_db("V(2)");

// Find value at specific frequency
var i10k = a.value_at("I(U1)", 10000);
echo('I(U1) @ 10kHz =', i10k.toEng());

// Run AC with more datapoints
ac().points(40).variation("dec").run();

// Save AC data to CSV file
a = ac().run();
file_write_csv('1.csv', a.csv());