EEVblog 1557 - Micsig SigOFIT Optical Fibre Probe + GaN Experiment

Review of the new Micsig SigOFIT Optical Fibre oscilloscope probe, including a practical demonstation of the incredible CMRR range of opticallly isolated probing of a 300V GaN transistor driver circuit. And a direct comparison with the HVP-70 high voltage differential probe to show you the incredible game changing difference optical fibre probes make. Links: 00:00 - Micsig SigOFIT Optical Fibre Probe vs Active FET 02:25 - High Voltage Differential Limitation and why you might need an Optical Fibre probe 03:25 - Galvanically isolated, and power-over-fibre 04:39 - Comparison with the Tek IsoVu & Lecroy DL-ISO 05:55 - The CMRR is AMAZING! 07:15 - A look at the SigOFIT probe 10:04 - An optical fibre probe is NOT a high voltage differential probe! 10:40 - Practical example using a 600V Gallium Nitride GaN circuit demo 11:39 - What is a Gallium Nitride (GaN) Transistor? 13:23 - GaN / HEMT, and Silicon Carbide SiC Transistors 14:21 - IGOT60R070D1 600V GaN datasheet & Half Bridge switching configuration 15:30 - This is IMPOSSIBLE with a regular probe! 19:07 - GaN EiceDRIVER chip 19:54 - The practical GaN test setup 23:10 - Remote MXO4 scope control to take measurements 24:36 - High side GaN power transistor measurement with the SigOFIT 26:26 - Here is where the CMRR MAGIC happens! 27:41 - Comparison with HVP-70 High Voltage Differential Probe 28:45 - Look how the High Voltage Differential Probe is just horrible here! 31:56 - Baseline High Voltage Differential probe ringing vs...