4 layers97.6 × 108.3 mm
Projet Velux
louisonmalinge/Projet-Velux
Dans ce Git, vous trouverez les fichiers ayant permis de réaliser le projet Velux, avec ses différentes versions.
27 parts
4 layers114 × 100 mm
AMODO PSRR INJECTOR CBs 1
Amodo-Design/PSRR-Injector-Board1Board to allow you to measure power supply rejection ratio. Allows you to inject an AC ripple on top of your DC power supply to measure downstream. 0dB from 100Hz+.
- Size
- 114 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 51
- Pads
- 156
- Tracks, vias
- 52, 174
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 31 Mar 2026
- Updated
- 31 Mar 2026
Overview
AMODO PSRR INJECTOR CBs 1 is an open-source printed circuit board by Amodo-Design, from the Amodo-Design/PSRR-Injector-Board repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 4-layer board of 114 × 100 mm with 48 parts on 51 nets, routed with 52 tracks and 174 vias.
It is built around the FCR7350B, FCR7350R and FCR7350Y. Its parts include 11 connectors, 8 capacitors, 8 resistors and 4 inductors. It belongs with the power boards of this library.
Main components
3README
readme.mdPSRR Injector Board
Board to allow you to measure power supply rejection ratio.
Allows you to inject an AC ripple on top of your DC power supply to measure downstream. 0dB from 100Hz+.
Product page(https://amododesign.com/products/psrr-injector-board/)) · Designed by Amodo
How it works
A clean lab supply connects on one side, and your DUT on the other. A function generator creates a signal that is AC-coupled onto the supply rail, superimposing a small ripple on top of the DC. Large series inductance (1000 µH) between the coupling node and the supply input forms an LC filter with the injection caps (880 µF per rail), keeping the supply clean and avoiding backfeed into the supply's regulation loop.
The circuit is mirrored so you can inject on either the positive or negative rail.
Note: the input impedance of your supply may be fairly low, so you may need a power amplifier between your function generator and the PSRR board.
Specifications
| Parameter | Value |
|---|---|
| Max voltage | ±30 V |
| Max current | 1 A |
| Injection capacitance | 880 µF per rail |
| Series inductance | 1000 µH per rail |
| Flat band | 100 Hz – 1 MHz+ |
| Low-frequency rolloff | 20 dB/dec below 100 Hz |
| Usable range | ~1 Hz (with calibration) |
| Supply input | 4 mm banana plugs |
| DUT output | 4 mm banana plugs |
| Signal injection | SMA |
Repo layout
hardware/ KiCad project — schematic, PCB layout, 3D model
simulation/ LTSpice simulation file and component modelsGetting started
PCB — Open hardware/AMODO_PSRR_INJECTOR_CBs_1.kicad_pro in KiCad 6+.
Simulation — Open simulation/psrr.asc in LTSpice.
License
Open-source hardware. Gerbers, schematics, and BOM are freely available — fabricate it yourself or send to your favourite PCB house.
Parts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 220uF | Amodo:C_ALU_D12.5_L25_THT | C1, C2, C3, C4, C5, C6, C7, C8 |
| 4 | 0R | Amodo:R_1206_3216Metric | R1, R3, R4, R6 |
| 4 | 250uH | Amodo:744224 | L1, L2, L3, L4 |
| 4 | FCR7350B | Amodo:S16N-PC-BLACK | J3, J6, J8, J9 |
| 4 | M3 | Amodo:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 2 | +Vsupply | Amodo:TestPoint_Dual_D1.5mm_H1.0mm | TP5, TP10 |
| 2 | 49.9R | Amodo:R_0603_1608Metric | R5, R7 |
| 2 | 5R | Amodo:R_0603_1608Metric | R2, R8 |
| 2 | FCR7350R | Amodo:S16N-PC-RED | J2, J5 |
| 2 | FCR7350Y | Amodo:S16N-PC-YELLOW | J1, J7 |
| 2 | GND | Amodo:KeystoneMiniatureTestLoop | TP3, TP8 |
| 2 | SMA Jack | Amodo:SMA-J-P-H-ST-TH1 | J4, J10 |
| 1 | +Vinjected | Amodo:KeystoneMiniatureTestLoop | TP1 |
| 1 | +Vout | Amodo:KeystoneMiniatureTestLoop | TP2 |
| 1 | +Vsupply | Amodo:KeystoneMiniatureTestLoop | TP7 |
| 1 | -Vinjected | Amodo:KeystoneMiniatureTestLoop | TP12 |
| 1 | -Vout | Amodo:TestPoint_Dual_D1.5mm_H1.0mm | TP6 |
| 1 | -Vout | Amodo:KeystoneMiniatureTestLoop | TP4 |
| 1 | -Vsupply | Amodo:KeystoneMiniatureTestLoop | TP9 |
| 1 | -Vsupply | Amodo:TestPoint_Dual_D1.5mm_H1.0mm | TP11 |
| 1 | LOGO | Amodo:Logo-Amodo-Full-25mmx7mm | G*** |
| 1 | ~ | Amodo:5-146252-1 | J11 |
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Questions
How big is the AMODO PSRR INJECTOR CBs 1 PCB?
It measures 114 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the AMODO PSRR INJECTOR CBs 1 use?
48 parts, built around the FCR7350B, FCR7350R and FCR7350Y. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the AMODO PSRR INJECTOR CBs 1 KiCad files?
From the Amodo-Design/PSRR-Injector-Board repository on GitHub, at the commit this page was made from: the board is hardware/AMODO_PSRR_INJECTOR_CBs_1.kicad_pcb and its schematic hardware/AMODO_PSRR_INJECTOR_CBs_1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the AMODO PSRR INJECTOR CBs 1 design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).