Article

Active Differential Probe (V2)

Now USB-powered

Rapid digital signals are delivered differentially. Examples include HDMI, DVI, and USB. Are you looking to measure high-speed digital signals? This article presents an updated version of an active differential probe. The supply voltage is now from a 5-V USB connection.

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Materials

2-GHz Active Differential Probe

Extra info / Update

Attenuation: 10:1 with differential signal and 50 Ohm termination
Differential input resistance: 5100 Ohm, ±1%
Single-ended input resistance: 2550 Ohm, ±1%
Input common mode range: ±12 V
Output resistance: 50 Ohm, ±1%
Bandwidth: approx. 1.9 GHz (-3 dB)
Rise/fall time: 300 ps
Power supply: USB 5 V, approx. 70 mA