Leading guestions+1

[rr]

If the amplifier is the Nat-semi LM1964 (which I think it is), the max
input range is from -3v to +16v on either input. Transients are +-60v.

BobR.

Bruce Plecan wrote:

> > Bruce Plecan wrote:
> > > If, I was to have a O2 sensor that worked at a different range of
> voltages
> > > then the gm use, could I just use a comparator at the new Os voltage
> level,
> > > and use it to switch from .1 to .9 volts, as it crossed it's 14.7:1?.
> > I don't think so.  GM likes to compute a long term average of the O2
> > voltage.  This average is used for some of the fine tuning during closed
> > loop.  The target average is specified in the PROM.  In one application,
> > this value changes between just about every PROM version.  A 4-speed
> > PROM has a different value from a 5-speed PROM, and both differ from an
> > automatic PROM, and so on.
> > You might be able to insert an analog amplifier (or voltage divider)
> > between the "new" O2 and the ECM's O2 input.
>
> Anyone happen to know what the max O2 voltage is before the ecm lets the
> smoke out?
> Or what the max O2 diacom will record.
> Grumpy
>
> ----------------------------------------------------------------------------

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