[sdiy] triangle core VCO comparators

[mskala at ansuz.sooke.bc.ca]

On Thu, 25 Feb 2016, Richie Burnett wrote:

> Some op-amps have anti-parallel protection diodes between the two
> inputs. Not a problem in typical op-amp circuits where negative feedback
> keeps both inputs at almost the same potential during normal operation.
> But it causes problems in "comparator" service where there could be
> considerable voltage difference forced between the two inputs!

How common is this *really* in the ordinary kind of op amp today?  The
OP27 seems to have it.  Any others?

-- 
Matthew Skala
mskala at ansuz.sooke.bc.ca                 People before principles.
http://ansuz.sooke.bc.ca/