Measuring ultra-low impedances (20 micro-ohm) is a challenge for any power distribution network (PDN) design engineer. The 2-port shunt-through measurement is the standard method for measuring milliohm impedances up to very high frequencies (GHz). Unfortunately, this measurement includes an undesirable ground loop related to the instrument grounds and test setup cabling. The ground loop introduces significant errors if proper care is not taken. This application note shows how to measure as low as 20 μΩ using the Picotest J2102A as a ground loop breaker.
In this video, Keysight ADS SI application scientist Tim Wang Lee shows you how to use basic signal integrity (SI) analyses such as eye diagrams, S-parameters, TDR and single pulse response to solve signal integrity problems.
Marko Marin, Technical Account Manager at Ansys, stopped by our booth at DesignCon to answer a few questions about signal integrity.
From signal integrity to roughness of the copper and stack-up design, here are a few PCB design tips you could use:
- Insertion loss and attenuation
- Signal integrity for automotive electronics and IoT
- Fine lines
- Copper for ground and power planes
- Roughness of the copper
- Stack-up design
- Work with your fabricator
We met with Rick Hartley during PCB West 2018 to discuss signal integrity, controlled impedance and other PCB designers’ pain points. What can you do to improve your designs? Listen to the master!
Allegro, Sigrity, signal integrity, ODB++, IPC-2581… Dennis Nagle, Product Engineering Architect, told us all about the ECAD tools news at Cadence.