Power Mosfets as resistors for a.c. current.
Power Mosfets as resistors for a.c. current.
(OP)
I want to make use of power mosfets as voltage controlled resistors for a.c. currents without introducing distortion.
Typical devices like irf540 have everything going for them except the zener between D & S because they are designed to switch. Are there devices suitable?
Typical devices like irf540 have everything going for them except the zener between D & S because they are designed to switch. Are there devices suitable?
RE: Power Mosfets as resistors for a.c. current.
Current/voltage range ?
How much distortion is acceptable?
The best solution seems to be to use pulse width modulation
at a much higher frequency and then -- if necessary --
filter it out.
Plesae read FAQ240-1032
My WEB: <http://geocities.com/nbucska/>
RE: Power Mosfets as resistors for a.c. current.
RE: Power Mosfets as resistors for a.c. current.
Plesae read FAQ240-1032
My WEB: <http://geocities.com/nbucska/>
RE: Power Mosfets as resistors for a.c. current.
RE: Power Mosfets as resistors for a.c. current.
maximize the power. Adding resistor just wastes power.
What do you have, what are you trying to do and what are the data ?
Plesae read FAQ240-1032
My WEB: <http://geocities.com/nbucska/>
RE: Power Mosfets as resistors for a.c. current.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Power Mosfets as resistors for a.c. current.
RE: Power Mosfets as resistors for a.c. current.
Why? It's more expensive and more complex, and in all likelihood less linear too.
What's so wierd about the application? This isn't one of the 'wierd' things that make audio electronics different to all other branches of electronics, is it?
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I don't suffer from insanity. I enjoy it...
RE: Power Mosfets as resistors for a.c. current.
The application is for musicians, how weird do you want?!
RE: Power Mosfets as resistors for a.c. current.
Try to write a spec of what you are trying to build in terms of required voltage / current / power / linearity / THD / frequency range / cost etc. Feeding it out piecemeal doesn't make it easy to see the whole picture.
As for musicians being wierd, absolutely!
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I don't suffer from insanity. I enjoy it...
RE: Power Mosfets as resistors for a.c. current.
As for the IRF540, http://www
likewise,
http://ww
It's unlikely that you'll find a power MOS device with a floating substrate.
TTFN
RE: Power Mosfets as resistors for a.c. current.
A man came in with a special request: as a musiclovor
with perfect hearing he wanted perfect sound -- he has
read somewhere about gluing a piece of eggshell into the
middle of the dynamic loudspeaker to improve the high
frequencies.
During the argument we connected a loudspeaker to a
generator -- he couldn't hear 12 kHz...
Plesae read FAQ240-1032
My WEB: <http://geocities.com/nbucska/>
RE: Power Mosfets as resistors for a.c. current.
RE: Power Mosfets as resistors for a.c. current.
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I don't suffer from insanity. I enjoy it...