Re: 5 to 10V level shifter?

Posted by Mark Cannell-2 on
URL: http://confocal-microscopy-list.275.s1.nabble.com/5-to-10V-level-shifter-tp7592213p7592220.html

*****
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.
*****

Maybe but it apparently needs a slew rate > 10V/us into what may be a 50 ohm impedance. This is RF circuitry. Perhaps the manufacturer can give some more details as it's hard to define what's needed on the basis of the supplied info. IMHO

Cheers

Mark B. Cannell. Ph.D. FRSNZ FISHR
Department of Physiology, Pharmacology & Neuroscience
School of Medical Sciences
University Walk
Bristol BS8 1TD
 
[hidden email]
 
 

On 9/05/21, 10:36 AM, "Confocal Microscopy List on behalf of Nino Karpf" <[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.
    *****

    Dear Petro,

    Would an amplifier solve your problem? If you buy an electronic amplifier that amplifies your driving voltage 2-3 times (from 5V to 10V or higher) you should be able to drive your pockels cell. Unless I’m thinking too easy here. You can buy suitable amplifiers from e.g. Minicircuits.

    Best,
    Nino

    Von meinem iPhone gesendet

    > Am 09.05.2021 um 10:44 schrieb Khoroshyy Petro <[hidden email]>:
    >
    > *****
    > 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.
    > I will have a look on the shifter.
    > I am a bit lost by analog control?
    > Do you mean setting up the HT by control voltage?
    > Thanks.
    > Petro.
    >
    >> On Sat, May 8, 2021, 23:12 Benjamin Smith <[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.
    >> *****
    >>
    >> There are submicrosecond level shifters such as this:
    >> https://www.onsemi.com/pdf/datasheet/mc14504b-d.pdf, and if the impedance
    >> was high enough on the input you could even use a high side driver for even
    >> faster switching speeds.  However, if you are driving a Pockels cell (which
    >> normally requires analog instead of digital control) I would just use an
    >> op-amp voltage multiplier.  A unity gain stable op-amp would be the easiest
    >> bet, and one like this would be plenty fast:
    >>
    >> https://www.digikey.com/en/products/detail/analog-devices-inc/LT6200CS6-TRMPBF/1115933
    >>
    >> On Sat, May 8, 2021 at 12:58 PM Khoroshyy Petro <[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 everybody.
    >>>
    >>> This question is not directly about confocal microscopy but, and might be
    >>> better addressed on some electrical engineering forum. Bit i believe
    >> there
    >>> is someone who can guide me in the right direction.
    >>> I need to drive a Pockel cell driver with 10 V pulses, but available
    >> pulse
    >>> generator has max 5V output. I need pulses with submicrosecond rising
    >> time.
    >>> I have searched for level shifters chips with needed bandwidth and
    >>> impedance but all of what I found work up to 5.5 volts.
    >>> I wonder if someone can recommend some solution for the problem or give a
    >>> hint.
    >>> Thanks.
    >>> Petro.
    >>>
    >>
    >>
    >> --
    >> Benjamin E. Smith, Ph. D.
    >> Imaging Specialist, Vision Science
    >> University of California, Berkeley
    >> 195 Weill Hall
    >> Berkeley, CA  94720-3200
    >> Tel  (510) 642-9712
    >> Fax (510) 643-6791
    >> e-mail: [hidden email]
    >>
    >> https://vision.berkeley.edu/faculty/core-grants-nei/core-grant-microscopic-imaging/
    >>