kevin gilmore
Señor Stax. Señor MAXX.
Can Jam '10 Organizer
- Joined
- Jun 21, 2001
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Quote:
How you going to get the output of the opamp down to the minus
(400 to 500 volt) rail. Or are you going to reference the output at 0
and capacitively couple (exactly like the hev70) Or are you going to lift
everything to VCC/2 and end up with 1kv on the bias...
(most people are very scared about this last one for safety reasons)
Or capacitvely couple to the plus and minus rails (koss) and stack
fets with capacitive drive.
hev70 circuit likely copyrighted, so i won't link to that but this isn't
http://gilmore.chem.northwestern.edu/koss.gif
Originally Posted by jcx /img/forum/go_quote.gif I'm sure Kevin Knows a lot more about the limitations with several successful designs, but just looking at the raw numbers I don't immediately see problems |
How you going to get the output of the opamp down to the minus
(400 to 500 volt) rail. Or are you going to reference the output at 0
and capacitively couple (exactly like the hev70) Or are you going to lift
everything to VCC/2 and end up with 1kv on the bias...
(most people are very scared about this last one for safety reasons)
Or capacitvely couple to the plus and minus rails (koss) and stack
fets with capacitive drive.
hev70 circuit likely copyrighted, so i won't link to that but this isn't
http://gilmore.chem.northwestern.edu/koss.gif