At 03:29 PM 2/8/02 -0800, Brian Kraut wrote:
>The 1.8V was in an Electronics Workbench simulation.  The real thing is
>about .8V.  I am using an adjustable power supply as the input now so
>input impedance is not a problem.  The real circuit will have a 24V
>supply and an input that will vary between about three volts and 15 volts.

Something else to try with the LM324 is to add pull-down resistors to the
outputs of the op-amps - something around 4k7 should be fine.  There can be
a problem in the output stage near the class A - class B crossover (very
well documented in NS data sheets).  Its worth a try.

dwayne


Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

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