Electronics > Projects, Designs, and Technical Stuff
HV AC Function Generator for Biology Experiment
charlescurt:
Hi All,
I have a biology device that we wish to do a test on. We are currently using a 700Vpp 45kHz signal to perform the function but wish to determine if other values are better.
I am trying to find (without luck) an AC to AC amplifier could hook up to a waveform generator to allow me to create a test that output the following specs:
0 - 1kV
0 - a few MHz
Another alternative would be to get an AC generator with those specs but I also haven't found those.
There is basically no load since it is a field-effect device so it doesn't need high power. I would like to buy something off the shelf, anyone know a device that is close to this? If not I'll go the custom route if that's the case can anyone suggest something off the shelf that solves any part of this?
dom0:
1 kVpp at a "few MHz" (3) requires a slew rate on the order of about 10 kV/µs. That in itself would be possible with very high speed, off the shelf devices, but not at a 1 kVpp swing. I wouldn't expect this to be feasible solid state only, unless you are not talking about an actual analog amplifier but rather something like a pulse generator.
PartialDischarge:
Look here, http://www.trekinc.com/products/HV_Amp.asp
However those are expensive instruments and dont even meet your specs. Luckily in electronics one can get away with fast pulses to create harmonic content instead of pure sinewaves, but in your case, a biologocal experiment, that may be different
KaneTW:
I would generate a low-voltage sine at the desired frequency and then run it through a step-up transformer. You'll have a lower frequency bound, so for low-frequency you'd have to use something else.
Berni:
Yeah i think the best way is to get a amplifier similar to this:
https://www.newtons4th.com/products/laboratory-power-amplifiers/lpa01/
And then design your own ferrite core transformer to boost the output up to the desired voltage. Tho getting it to work bellow 1kHz might be difficult as the transformer could start getting large.
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