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Subject: Linear Amplifier construction

Date: 06/08/02 at 7:28 PM
Posted by: alan
E-mail: abbarr@yahoo.com
Message Posted:

Hello all,

I'm a linear circuits novice attempting to build an amplifier.

I am generating an analog output via a digital to analog card in my pc. The output of this card is limited to 10V. I require 20V from my amplifier (less than 50mA). All of the cheap op amps i've looked at have supply voltages of no more than +/-18V which limits my output to ~16V.

I will be creating some complicated wave forms from my D/A card and simply need that wave amplified.

My questions:

1. Am I approaching this correctly, or should I be looking to just buy a prefab adjustable gain amp?

2. Where can I purchase an op amp that can supply 25-30V?

3. If I construct a simple linear amp, what do I need to consider in order to maintain my original signal characteristics.

I appreciate any and all responses/advice.

Thanks, alan.

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