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100MHz Differential Probe - 240V
This is a joint project to build a differential probe that has a bandwidth of about 100MHz.
The probe has an input impedance of 20MegΩ// 1.25pF - differential, 10MegΩ//2.5pF for each terminal to GND.
Differential Gain is 1/10 V/V. The maximum input voltage is +/-25V and a Common Mode of 240V AC.
This means that you can look at signals that are mains referenced.
The details can be found on my Blog here: https://www.paulvdiyblogs.net/2017/10/differential-amplifier-probe-make-buy.html
This version can handle up to 240V and used a standard 5V USB wall wart for power.
The chief designer of the probe, Bud Bennet describes his version, which is a little different here: https://hackaday.io/project/169390-a-10x-100mhz-differential-probe
Other files can be found here : https://github.com/paulvee/100MHz-Differential-Probe
100MHz Differential Probe - 240V
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
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