AW: Re: external input (again)

[Don Tillman]

   Date: Fri, 24 May 1996 08:03:48 -0700
   From: Don Tillman <don at till.com>

      >Thanks Gene! If I *were* being audiophile-minded, what would I do 
      >differently?

      [JH adds good stuff]

   And lose the gratuitous polarity inversion.  (That's considered tacky
   in both audiophile and engineering circles.)

(...Assuming of course that you don't intentionally want a polarity
inversion.)

In general, when proposing a circuit and asking for advice it's a good
idea to give us as many specifics as possible about what you want and
the context the circuit is going to be used in.  Input impedance,
output impedance, gain, noise, overload issues, input/output
protection issues, low/high end frequency reponse, that sort of thing.

Also it's a good idea to check out some good books on opamp design,
they can cover so much more than an email message possibly could, with
graphs and schematics and all.  I'm not up on what's currently
available, but Walt Jung has written some very good stuff.

  -- Don