That front end layout looks quite familiar! Please tell me you are keeping the design open source in compliance with the CERN-OHL-S license
https://jmw.name/projects/active-probe/
https://github.com/jmwilson/oshw-active-probe
I went with SMA in my design because it's easy to buy and make cables, and adapters are plentiful.
Pins sockets are tricky but the Mill-max 0335 is compatible with PMK's probe tip accessories.
What's the USB-C connector for, and all the ICs and discrete transistors? Is it using USB-PD to charge the battery?
Hi, yes I saw your project before and it is very nice, congrats!
Let's see how will be my input impedance and S21, I can not use 0402 components otherwise I will have troubles to solder it, so we can compare the results later.
Also, I thought in different arrangements of the input front end that I want to test, my idea is do two or three different layouts to try.
I'm thinking if I will release as oshw also, I like the idea because then it could be easy for repair of the product in the future, and not depending on me to do it.
My project is based on BUF802 from TI design (
https://www.ti.com/product/BUF802) also with other features.
The goal I have in mind is to achieve something similar with Tetris® 1500 from PMK.
What I'm most interested is in having a flat response up to 600-800Mhz.
Results will be shared here, I think I will be able to have it up to end of August.
I will take a look on the connector you suggested, which of PMK accessories it would be compatible with?
Thinking in my daily work, I decided to not rely exclusively on power supplies, so I added a battery to have fewer cables running around the setup.
Battery life is a topic of concern, I'm thinking to have an option to reduce the bandwidth to reduce the consumption in the future but it's not implemented at the moment.
USB-c connector is to charge the battery or feed the probe if you don't have time to charge it before.
The ICs and transistors you see are for charging the battery, boost converter, reverse polarity protection, low voltage protection, switch.