high voltage amplifier

[Alexander]

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

Thanks in advance.
Alexander.

 

[Winfield Hill]

Alexander wrote...

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

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

 

[John Popelish]

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

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?

 

[Ken Smith]

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

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

 

[Rob Judd]

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

Yes.

 

[Bill Sloman]

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

Here is a good start.

http://eportal.apexmicrotech.com/mainsite/pdf/power_op_amps/pa94u.pdf

The PA89,PA95 and PA97 might also be worth a look.

 

[Alexander]

Thanks to all who replied to my problem.

Alexander.