http://confocal-microscopy-list.275.s1.nabble.com/inverting-photo-detector-polarity-on-a-microscope-tp7588654p7588663.html
I'm glad it was helpful. The evaluation boards are much more convenient
customization. At unity it will also make a good buffer, as Zdenek's
> *****
> To join, leave or search the confocal microscopy listserv, go to:
>
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> Post images on
http://www.imgur.com and include the link in your posting.
> *****
>
> Thanks Craig. It looks like I could modify the THS3120EVM to operate at a
> gain of -1 by swapping out some resistors. The opamp itself is unity gain
> stable.
>
> Mike
>
> On Thu, Sep 6, 2018 at 12:43 PM Craig Brideau <
[hidden email]>
> wrote:
>
> > *****
> > To join, leave or search the confocal microscopy listserv, go to:
> >
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> > Post images on
http://www.imgur.com and include the link in your
> posting.
> > *****
> >
> > You'd still need to apply a 2V offset then come down from that. By the
> time
> > you splice in the bias offset you might as well have patched in an
> > inverter.
> > Craig
> >
> > On Wed, Sep 5, 2018 at 11:42 PM Mark Cannell <
[hidden email]
> >
> > wrote:
> >
> > > *****
> > > To join, leave or search the confocal microscopy listserv, go to:
> > >
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> > > Post images on
http://www.imgur.com and include the link in your
> > posting.
> > > *****
> > >
> > > You could just record the data as is and invert the image afterwards?
> > >
> > > Mark B. Cannell. Ph.D. FRSNZ FISHR
> > > Department of Physiology, Pharmacology & Neuroscience
> > > School of Medical Sciences
> > > University Walk
> > > Bristol BS8 1TD
> > >
> > >
[hidden email]
> > >
> > >
> > >
> > > On 6/09/18, 2:23 AM, "Confocal Microscopy List on behalf of Edward
> > > Allgeyer" <
[hidden email] on behalf of
>
[hidden email]
> > >
> > > wrote:
> > >
> > > *****
> > > To join, leave or search the confocal microscopy listserv, go to:
> > >
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> > > Post images on
http://www.imgur.com and include the link in your
> > > posting.
> > > *****
> > >
> > > Hi Mike,
> > >
> > > I have no commercial interest in either of the things I'm going to
> > > mention
> > > but they maybe of interest to you.
> > >
> > > First, there is a California based company, Pulse Research Lab,
> that
> > > sells
> > > a selection of high speed off the shelf comparators/sine wave
> > > converters
> > > that I've had success with for similar purposes. Their comparators
> > are
> > > fairly forgiving with what you connect as the input and you have a
> > > number
> > > of options for the corresponding output. You can browse their
> > selection
> > > here:
> > >
> > >
> > >
> >
>
https://www.pulseresearchlab.com/collections/comparators-sinewave-converters-1> > >
> > > I'll also mention that on their comparators they have preset
> > > thresholds but
> > > you can also set an arbitrary threshold by applying a DC voltage to
> > the
> > > complementary input if you want to.
> > >
> > > Second, Picoquant also sells a few inverters and adaptors that
> might
> > > work
> > > for you. Specifically the SI100 is a passive inline pulse inverter
> > and
> > > might work for your application. You can browse their adapters,
> > > splitters
> > > and cables here:
> > >
> > >
> > >
> >
>
https://www.picoquant.com/products/category/accessories/adapters-splitters-cables-various-accessories-for-photon-counting-setups> > >
> > > Hopefully this helps. Again, no commercial interest in either of
> > these
> > > companies. Just thought I'd mention them as possible options.
> > >
> > > Best,
> > > Ed
> > >
> > > On Wed, Sep 5, 2018 at 12:58 PM Michael Giacomelli <
[hidden email]>
> > > wrote:
> > >
> > > > *****
> > > > To join, leave or search the confocal microscopy listserv, go to:
> > > >
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> > > > Post images on
http://www.imgur.com and include the link in your
> > > posting.
> > > > *****
> > > >
> > > > Hi,
> > > >
> > > > I would like to test out a new detector module in a commerical
> > > Olympus
> > > > confocal body. Unfortunately, the detector uses an inverting
> > > amplifier
> > > > (0->-1 V), while the Olympus assumes a non-inverting
> transimpedance
> > > > amplifier (0->+1 V). I've spoken with them and there is no way
> to
> > > change
> > > > the A/D configuration on this specific model, and so I cannot use
> > the
> > > > detector as is.
> > > >
> > > > Is there a commerical solution available for adapting something
> > like
> > > this?
> > > > I would like to avoid having to design and breadboard an
> inverting
> > > buffer
> > > > amplifier if I can avoid it.
> > > >
> > > > Thanks,
> > > > Mike
> > > >
> > >
> > >
> > >
> >
>