This invention is an inexpensive probe apparatus operating at high precision that can be used for both low-frequency and high-frequency measurements. A line with a first and second conductor is extended from a probe connected to a circuit component. A low-frequency or high-frequency device is...http://www.google.se/patents/US5680039?utm_source=gb-gplus-sharePatent US5680039 - Probe apparatus for use in both high and low frequency measurements
