In short, [Christer] needed a high-frequency active differential oscilloscope probe, and they’re not cheap. So he built one himself. With some minor tweaking on the input damping resistors ...

A differential probe, a device for measuring the voltage between two points in a circuit rather than the ... and the power is derived from the scope’s USB interface. All in all it’s an ...

Differential probes offer high common-mode rejection over a broad range of frequencies and use an internal differential amplifier to convert the difference between two inputs into a voltage that can ...