The high speed low capacitance probe presented here is a flexible / tailorable tool for internal node testing on Radio
Frequency Integrated Circuits (RFIC). The probe utilizes the mutual capacitive coupling between two wires. In this
case, a tungsten whisker and the inner conductor of a coaxial cable forms a capacitor, enabling extremely low probing
(loading) capacitance. The mutual capacitance which can be modeled to the first order as a lumped element capacitor
provides differentiating action. Viewing the derivative of the output signal, rise time and can be observed directly.
Through the use of probe calibration and Fourier transforms the probed signal can be re-created. Probe calibration
develops a transfer function enabling re-creation of time domain signals.