opamps.ato

component Opamp:
    power = new Power
    signal inverting
    signal non_inverting
    signal output
    designator_prefix = "U"

import Power from "interfaces.ato"
module VoltageFollower:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input
    signal output

    input ~ opamp.non_inverting
    opamp.inverting ~ opamp.output
    output ~ opamp.output

# import vdiv from "StandardCircuits.ato"

module Amplifier:
    power = new Power
    opamp = new Opamp
    vdiv = new Vdiv

    power ~ opamp.power

    # TODO: add equation for gain
    gain = unknown
    vdiv.r_top.value = unknown
    vdiv.r_bottom.value = unknown

    signal input
    signal output

    input ~ vdiv.input
    vdiv.output ~ opamp.inverting
    output ~ opamp.output
    output ~ vdiv.gnd

    inverting ~ power.gnd

# Inverting Amplifier: Amplifies and inverts the input signal.
# The gain is determined by the resistor values.
module InvertingAmplifier:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input
    signal output

    input ~ opamp.inverting
    output ~ opamp.output
    opamp.non_inverting ~ power.gnd


module SummingAmplifier:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input1
    signal input2
    signal output

    input1 ~ opamp.inverting
    input2 ~ opamp.inverting
    output ~ opamp.output
    opamp.non_inverting ~ power.gnd

module DifferentialAmplifier:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input_positive
    signal input_negative
    signal output

    input_positive ~ opamp.non_inverting
    input_negative ~ opamp.inverting
    output ~ opamp.output

module Integrator:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input
    signal output

    input ~ opamp.inverting
    output ~ opamp.output
    # Note: Needs a capacitor between inverting and output for integration

module Differentiator:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input
    signal output

    input ~ opamp.inverting
    output ~ opamp.output
    # Note: Needs a capacitor at the input for differentiation

module Comparator:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input_positive
    signal input_negative
    signal output

    input_positive ~ opamp.non_inverting
    input_negative ~ opamp.inverting
    output ~ opamp.output

module InstrumentationAmplifier:
    power = new Power
    opamp1 = new Opamp
    opamp2 = new Opamp
    opamp3 = new Opamp

    power ~ opamp1.power
    power ~ opamp2.power
    power ~ opamp3.power

    signal input_positive
    signal input_negative
    signal output

    input_positive ~ opamp1.non_inverting
    input_negative ~ opamp2.inverting
    opamp1.output ~ opamp3.inverting
    opamp2.output ~ opamp3.non_inverting
    output ~ opamp3.output

module ActiveFilter:
    power = new Power
    opamp = new Opamp

    power ~ opamp.power

    signal input
    signal output

    input ~ opamp.inverting
    output ~ opamp.output
    # Note: Specific filter components (capacitors, resistors) needed around opamp