up
elds.
gs
Got a guesstimate on what "a lot noiser" was. Twice the johnson noise over the frequency band? ten times. This obviously depends on the bias level too.
Yeah a few picofarads of stray C can sink a lot of 100 Meg ohm voltage noise.
Putting all the gain you need in one little area can lead to some problems. 10^4 was doable, but at 10^5 I got gain peaking, which screws up the measurment.
George H.