DIY an almost-GHz active differential oscilloscope probe

I have an old Tektronix 11801B scope with two 20 GHz sampling heads with 50Ω single ended inputs that can handle signals which are 1.0V peak-to-peak so that’s what I wanted the probe output to be compatible with. Finally there’s a a 50Ω resistor (R11) for impedance matching with the output which together with the 50Ω (R12) termination at the scope input attenuates the signal by 1:2 giving a total attenuation of 1:10 for the whole probe. A – Single ended probe with one OP-amp

B – Two standard OP-amps as the first stage

C – Dual OP-amp as the first stage

D – Fully differential OP-amp as the first stage

I have had very good experiences with using Eurocircuits for PCB manufacturing before.

Source: blog.weinigel.se