Re: High voltage limiter
Thanks to all for your replies...
The frequency involved is around 35 MHz, so this must be quite wideband.
IanP : Good suggestion, however the noise budget is soooo low. Even a 50 ohms series resistor (which makes the high voltage amplifier whines a lot) is too high a value. I initialy used 180 ohms with the two antiparallel diodes.
resistor noise = sqrt(4kTR) = 0.98nV/rtHz => 34,2 mV peak to peak @ 60 dB, 35 MHz
And that is only accounting for the resistor thermal noise... So any idea on how to avoid this resistor is more than welcome!!!