Re: Zener protection for 10kV pulses
- From: Winfield Hill <Winfield_member@xxxxxxxxxxx>
- Date: 5 Jun 2006 18:33:13 -0700
jwodin@xxxxxxxxx wrote...
I have the following circuit for one section of a single-atom
mass spectrometer.
I'd start with a simple beefing up the robustness of the path
from the rods to the DAC, as per the modification below.
.. G
.. _____|\_______________
.. | |/ |
.. Vac |
.. | _|_
.. Gnd C ---
.. | ,---------,
.. | | |
.. _____ Rx R | 1_| 2_ |
.. | DAC |--\/\/--+--\/\/--+-------|_| |_|---|--,
.. |_____| | | |
.. | R 3_ 4_ | |
.. +--\/\/--+-------|_| |_|---+ |
.. _|_ _|_ | |
.. C --- C --- '------------'
.. | |
.. gnd gnd
This way a spark discharge to the rod sees multiple filters
on the way to the DAC. I'd make the resistors -\/\/- from
a proper HV part, or multiple ordinary resistors in series.
Finally, I'd add the zener you spoke of, just after Rx, going
toward the DAC, plus another resistor to the DAC. That should
do it. Next, start worrying about creaming your ENI amplifier.
Keep in mind Zener and TVS diodes have lots of capacitance.
--
Thanks,
- Win
.
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