The decoder, which has been polished for a long time, uses NOS circuits. The circuits are simple and the sound is clear and transparent.

This is my first meaningful decoder. Since it involves converting digital to analog, I chose two areas: digital circuit and analog circuit.

For the convenience of design, there is no I/V on the board. Please connect an external preamplifier without input coupling capacitor but with output coupling capacitor to act as I/V.

All direct plug-in components, very friendly to novices and players who don’t know how to solder patches.

Hundreds of millions of faith icons posted randomly (doge)

Sound audition effect portal (Station B): https://www.bilibili.com/video/bv1FL4y1478d

Note: If all components are connected, the power supply is intact, and there is no sound, please change the order of the lines connected to RXN and RXP.

PCB floor plan

Schematic:

Physical map

BOM

I can't find a place to upload attachments to upload gerber at the moment. There is no upload attachment button in the web version (Chrome) and Lichuang EDA. I can't find the markdown and rich text mode on the entire page . I don't know what's wrong with the open source platform.