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Date: 09/30/00 at 2:42 PM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org

In Reply to: Audio pre-amp IC's posted by Alan on 09/30/00 at 2:09 PM:

Hi, Al.

I suggest you look at the preamplifier circuit on the left hand side at the bottom of page 15 of Linear Technology's data sheet for the LT1028 at:

http://www.linear-tech.com/cgi-bin/parser?action=pdf&var=lt1028.pdf

Interestingly, seven years ago, I tried to use the LT1028 in the suggested circuit and had all kinds of trouble with it due to noise and marginal instability in the neighborhood of 100 KHz. However, when I substituted for the LT1028, the Analog Devices part AD797, this circuit worked just dandy! Your project might look into the possible reasons why this was the case.

Good luck.

John Dunn - President
Ambertec, Inc.
ambertec@ieee.org

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