Transient Response Calibration

MikeML

Joined Oct 2, 2009
5,444
Use a big NFET to connect/disconnect a several amp resistive load to the power supply. Measure the step response of the PS as the NFET turns on/off.

This illustrates the concept. Note how bad it is without a bypass cap on the output:

12.gif
 
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Thread Starter

Ryne Shelton

Joined Feb 20, 2015
4
I'm in a calibration lab. I'm also new to the lab so I'm not familiar with everything in it yet. Everyone else is gone.

I'll look around and see what I can come up with. Thank you for the help.
 

crutschow

Joined Mar 14, 2008
34,201
Even a toggle switch should work to connect and disconnect the load.
The contact bounce on make should be tolerable for this test.
 

Thread Starter

Ryne Shelton

Joined Feb 20, 2015
4
Thanks for the info guys. And yes, we do have single-event recording o'scopes. I'll try it on Monday when everyone is back in the lab and let you guys know how it goes. Have a good weekend.
 
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