Re: New Vector Monitor Project: DEFLECTION SCHEMATIC FOR REVIEW

> > I found out too that fet op-amps act funny near the supply rails...
> > set-up as a simple buffer, if the input gets too close to the supply
rails,
> > the output flips over!!! In tests, on +-12volt supplies, with an in
of -10
> > volts or more, the output jumped to +11!! something to think about if
> > op-amps are used...
> >
> > Aaron Howald
> > ahowald@w-link.net
>
> Not just FET opamps, most ALL older opamps will phase reverse the output
if the
> input pins are taken too close to the negative rail. Newer ones don't do
this,
> the key there is to look for them to say that the inputs work
rail-to-rail.
> HOWEVER, in a vector amplifier it would be doubtful the input would go
outside
> the +/- 5 volts range, a good 10 volts from either rail.
>

I'll be making sure to keep the inputs well away from the rails. Thanks for
the reminder anyway.

I think the vector monitors are rated up to +/- 8 Volts input.

Thanks,
James
Received on Thu Nov 4 06:31:06 1999