On Thu, Nov 06, 2003 at 08:29:19PM -0800, ali marjovi enlightened us thusly
> Hi
> Here are more details:
> I have 12 v supply and 10 v swing is enough.
> I don't want power(or expensive )opamps with a few
> ampere capabilty.I need only about 40 mA not more.
> Also I need to fit 5 outputs in a limited place on
> PCB.
> Inputs of amplifiers will be 8 bit D2A outs ,So 8 bit
>
> resoulution should not be lost.
> I think my problem comes from fact that only opamps
> with Iout<10-15 mA have short circuit protection.
> After that you have to jump to power opamps which is
> Much more that needed. Am I right?
> Thanks Elbert and Declan
> Ali
>
I think you'll have difficulty getting 10V out with only a 12V supply. I
presume you're talking 0, & 12V as supplies, and 0-10V out. I'd like a
15V spupply at least.
Start doodling with a pnp transistor as supertransistor in an output
circuit. You might do it that way. You can also current limit by putting
a small resistor in the emitter, and two diodes from supply to base
would provide some current limiting.
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
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