Electronics > Projects, Designs, and Technical Stuff

Power driver (or amplifier) for signal generator

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OM222O:
just as a sanity check, this is what you're after, correct?

Circuit link

If so you can start choosing the parts that meet your specs.

ricko_uk:
Thank you OM0222, David and MasterT !! :)

Interesting options!!

OM0222, yes that is exactly what I was looking for. Ideally as ready made low-cost box but then again, it seems a quick and easy solution to implement with components too. That's exactly it!

Thank you all :)

OM222O:
There'd be major issues with rise time if you want to drive inductive loads. You'd probably need to use higher voltages for faster rise time and that starts to rule out moafets and enter BJT territory.

Do you know the specs of the the coil? Aka the inductance and resistance?

ricko_uk:
Thank you OM0222,

I just got hold of the coil and measured it. DCR is 26R and inductance is 94mH at 1KHz and 46 at 10KHz (the frequencies that my meter uses).

I was also searching for some systems that apply higher voltages to start with to rise the current fast and then switch to lower voltage once the current has reached a certain level. But could not find any. Also I think to make them work for bipolar might complicate things quite a bit?

Thank you

Vovk_Z:
10 ns, 3 Ampere and 94 mH?!  :wtf:  :popcorn:
Have you made some approximate calculations?
Voltage across an inductor is
V = L di / dt = 0.094 H × 3 A / 10e-9 s = 28200  kV = 28.2 MV
 :popcorn:
It will be hard to realize all those requirements simultaneously.

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