Re: Question about opa350 data***


joakent@xxxxxxxxxxxxxx wrote:
I am looking at an analog opamp amplifier for a digital
scope and I was wondering if someone knows how
this opamp circuit works. I have captured the section
in question, of course there are more stages, but this
is the one which is the most interesting for me.

The circuit goes like this:

there is an op amp with a negative feedback loop through
a resistor Rf

then, the minus input is also connected to a resistor
divider which is connected from the positive 5v supply
to ground and both resistors are 1.8k, so the divider
is 2.5v.

the input goes into the plus input and the output is the
output of the opamp

Trivial - centres any amplifiction around 2.5V. Repost on
sci.electronics.basics nd see if you can find anybody with the patience
and spare time to provide chapter and verse.

--
Bill Sloman, Nijmegen

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