Open Source 150M Oscilloscope Differential Probe

The PD150 is a compact 150MHz differential oscilloscope probe for engineers on a budget and advanced hobbyists. It has advanced features such as automatic DC offset voltage zeroing and low-frequency common-mode rejection tuning. It will also provide complete documentation in the spirit of the old-fashioned "anchor" test equipment, detailing its working principles in addition to typical instructions for use and specifications. If you're not familiar with differential oscilloscope probes, you can think of them as tools that probe the voltage at any two points within a circuit, much like a multimeter. This is useful when you need to measure a part that is not grounded at either end. However, with a regular probe, you have to connect one end to the clip/ring, thereby shorting that node to the scope's chassis ground. Specifications: Bandwidth, 3 dB≥150 MHzAttenuation20:1Differential signal range±20 VCommon mode range±30 VDC offset voltage≤ ± 10 mV, referenced to input, after zeroingCMRR, 60 Hz≥ 70 dB, referenced to inputCMRR, 10 MHz≥ 40 dB , referenced to inputInput Resistance, between inputs1.08 MΩ between inputs, 540 kΩ from each input to groundInput Capacitance at 10 kHz≤ 3 pF between inputs, ≤ 6 pF from each input to ground, typicalDC Attenuation Accuracy≤ ± 5%Pulse Rise Time (10% to 90%)≤ 2.4 nsGain Flatness, 0-30 MHz≤ ± 0.5 dB, typicalInput Damage Threshold100 V