Do the AC signal lines require a signal and ground contact on the wafer or just one pad?
It is best to provide ground-signal pairs at the wafer in order to minimize ground inductance at the probe-to-wafer interface. Ground-signal-ground is even better. Ground inductance must be closely watched for the high-speed paths, both for insertion loss and for crosstalk to neighboring lines that might share ground return paths. This is particularly important for characterization measurements such as Vector Network Analyzer (VNA) measurements.
Related Questions
- Ive connected the Pressure Transducer using AC directly into the jackbox, but the signal output from the Pressure Transducer looks funny and has sharp mountain peaks and valley troughs. Why?
- To detect AC voltage with the AC HotStick, do I have to contact wires or make ground contact?
- Does the AP2440A Complex OSA’s require a clock signal to enable measurements?
