Re: 5 to 10V level shifter?

Posted by Nino Karpf on
URL: http://confocal-microscopy-list.275.s1.nabble.com/5-to-10V-level-shifter-tp7592213p7592222.html

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For these tasks an SRS SR560 comes in very handy, which can also be tailored for bandwidth. (No commercial interest, just a really useful multi-use lab accessory). But there are other excellent choices, too.

Best,
Nino

Von meinem iPhone gesendet

> Am 09.05.2021 um 14:24 schrieb Mark Cannell <[hidden email]>:
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> 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
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> On 9/05/21, 10:36 AM, "Confocal Microscopy List on behalf of Nino Karpf" <[hidden email] on behalf of [hidden email]> wrote:
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>    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
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>> Am 09.05.2021 um 10:44 schrieb Khoroshyy Petro <[hidden email]>:
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>> 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:
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>>> 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:
>>>
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>>>> 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]
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>>> https://vision.berkeley.edu/faculty/core-grants-nei/core-grant-microscopic-imaging/
>>>
>