Hi.
Thanks for the good responses. My newsreader is acting funny, so I can't find and follow-up to the original thread. I miss my old school UNIX text-based newsreader but I also digress.
To answer some questions:
- The reason I was looking at discreets was cost. Management wants to add a feature, last minute (of course) and has given me a VERY small budget to do it in. I figured that some FETs resistors and capacitors would be cheaper than op-amp.
- I don't know the details of the sound transducer (someone else did all that, including pre-conditioning, it might be a microphone element?), just the sound pressure to voltage sensitivity ("gain") and the frequency response, which drops off past 12 kHz or so.
- From all the advice, sounds like an op-amp is the fastest/cheapest, I guess I'll go that route.
- I was avoiding the 324 because it's GBWP is low, but I know there a bunch of single-supply op-amps I can look into.
Thanks. J.