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high voltage amplifier

Discussion in 'Electronic Design' started by Alexander, Jul 20, 2003.

  1. Alexander

    Alexander Guest

    Hi,
    Does anyone know a way to build DC amplifier with +/-10V input and
    +/-300V output ?

    Thanks in advance.
    Alexander.
     
  2. Alexander wrote...
    We show a simple technique that uses ordinary parts (see
    page 169 of our book, The Art of Electronics). This one
    can go from 10 to 1000V, but by a simple extention of the
    scheme one can make bipolar amplifiers that can go as high
    as +/-600 volts. I can send you a pdf of the schematic of
    our AMP-36 dual HV amplifier circuit board if you like.

    An alternate (more expensive) approach is to use one of the
    commercial high-voltage amplifier modules offered by Apex,
    such as their PA95 for $124 each. They also have the PA97
    for only $56, but it lacks a protective output current limit
    and other basic features. http://www.apexmicrotech.com

    Thanks,
    - Win
     
  3. Such a design would require more specs than that.

    What output power do you need?

    What minimum and maximum frequency must be amplified?

    What kind of load must the amplifier drive?
     
  4. Ken Smith

    Ken Smith Guest


    There are N channel MOS-FETs that work up to these voltages. Two of these
    in series would make a good output stage for the amplifier. If you only
    need low frequencies, I'd suggest you drive the gates with photo-voltaic
    opto isolators.


    Opto on pull up
    +/-10V signal ---!+\ !-->!--!
    ! ------/\/\/\--! !--- GND
    !-!-/ ! !--!<--!
    ! ! Opto on pull down
    ---!!---
    ! C1
    !---------/\/\/-- Vout
    ! 9xR
    \
    /
    \ R
    /
    !
    GND
     
  5. Rob Judd

    Rob Judd Guest

    Yes.
     
  6. Bill Sloman

    Bill Sloman Guest

  7. Alexander

    Alexander Guest

    Thanks to all who replied to my problem.

    Alexander.
     
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