Naive diff amp comperator
About the Naive diff amp comperator PCB
Naive diff amp comperator is an open source PCB design by MaxClerkwell, published on GitHub under the CC-BY-4.0 license. It is a board, with 11 components from 7 distinct parts.
From the project
Naive comparator from a BJT differential pair: SKiDL circuit, KiCad schematic, ngspice simulation
Release v1.1.0 is archived on Zenodo: DOI 10.5281/zenodo.22979080 (concept DOI for all versions: 10.5281/zenodo.22965437).
A simple comparator built from discrete bipolar transistors, no op-amp:
Q1/Q2 (2N3904) – NPN differential pair, common emitter resistor RE (≈ 0.4 mA tail current) RC1/RC2 – collector resistors Q3 (2N3906)** – PNP output stage, base driven through RB from Q1's collector, load resistor RL
Naive diff amp comperator bill of materials (BOM)
11 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 2N3904 | TO-92_Inline | Q1, Q2 |
| 1 | 2N3906 | TO-92_Inline | Q3 |
| 2 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | RB1, RL1 |
| 3 | 4.7k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | RC1, RC2, RE1 |
| 1 | 5 | V1 | |
| 1 | VSIN | VIN1 | |
| 1 | 2.5 | VREF1 |
Naive diff amp comperator design files
The KiCad project lives in the MaxClerkwell/naive-diff-amp-comperator repository on GitHub; these links point at the commit this page was built from.
- Schematickomparator.kicad_sch
- Netlistkomparator.net
Naive diff amp comperator: common questions
How many components are on the Naive diff amp comperator?
11 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the Naive diff amp comperator design files?
From the MaxClerkwell/naive-diff-amp-comperator repository on GitHub, which has the schematic and a netlist; the links under Design files point to each one.
Can I use the Naive diff amp comperator design in my own project?
Yes, under the terms of its CC-BY-4.0 license, which MaxClerkwell chose for the repository.