jitxlib-voltage-divider Python API

A Python package for voltage divider constraint solving and circuit construction, compatible with JITX and the jitxlib-parts package.

Installation

Install via pip:

pip install jitxlib-voltage-divider

Usage

1. Define Constraints

from jitxlib.voltage_divider import VoltageDividerConstraints
from jitx.toleranced import Toleranced

# Define input and output voltages with tolerances
v_in = Toleranced.percent(10.0, 1.0)   # 10V +/- 1%
v_out = Toleranced.percent(2.5, 5.0)   # 2.5V +/- 5%
current = 50e-6  # 50uA

cxt = VoltageDividerConstraints(v_in=v_in, v_out=v_out, current=current)

2. Solve for a Voltage Divider

This code needs to be run within the context of a JITX Design. Queried parts are cached and can be locked / unlocked per design from the BOM View in VSCode.

from jitx.design import Design
from jitxlib.voltage_divider import solve

class ExampleDesign(Design) :
    def __init__(self) :
        solution = solve(cxt)
        print("High resistor:", solution.R_h)
        print("Low resistor:", solution.R_l)
        print("Output voltage (Toleranced):", solution.vo)

Run JITX Design.

3. Build a Circuit

from jitx.design import Design
from jitxlib.voltage_divider import voltage_divider

class ExampleDesign(Design) :
    def __init__(self) :
        self.circuit = voltage_divider(solution, name="MyVoltageDivider")

Run JITX Design.

4. One-liner Construction

from jitx.design import Design
from jitxlib.voltage_divider import forward_divider

class ExampleDesign(Design) :
    def __init__(self) :
        self.circuit = forward_divider(v_in, v_out, current, name="QuickDivider")

5. Inverse Divider Example

from jitx.design import Design
from jitxlib.voltage_divider import inverse_divider, Toleranced, min_typ_max


class ExampleDesign(Design) :
    def __init__(self) :
        v_in = min_typ_max(0.788, 0.8, 0.812)  # Feedback voltage range
        v_out = Toleranced.percent(3.3, 2.0)  # Output voltage +/- 2%
        current = 50e-6
        self.circuit = inverse_divider(v_in, v_out, current, name="FeedbackDivider")

API Reference

• VoltageDividerConstraints, InverseDividerConstraints: Define the problem.
• solve: Solve for resistor values.
• Toleranced, Toleranced.percent, etc.: Tolerance helpers.
• voltage_divider, voltage_divider_from_constraints: Build a circuit from a solution or constraints.
• forward_divider, inverse_divider: One-liner helpers for common use cases.

JITX Integration

The returned circuit objects are compatible with JITX and can be used in larger PCB design flows.

License

See LICENSE file.