[time-nuts] OP-Amps for 10MHz distribution...?
wlfuqu00 at uky.edu
Wed Feb 29 15:15:21 UTC 2012
Low noise voltage at the cost of noise current which is around 1000 times that
of low noise JFETs.
The discussion suggest that opamps contribute to the sideband phase noise
of the signal. I am interested in the mechanism that adds this phase noise.
It would have to be a small shift in either gain (changing Miller
an internal capacitance in the opamp.
I am new to this group and have some catching up to do.
>I know of one op-amp that comes close to 1 nV/rtHz at 10 Hz and being
>capable of useful operation as a 10 MHz distribution amplifier -- the
>ADA4898 (1.2 nV/rtHz at 10 Hz, 4.3 nV/rtHz at 1 Hz). These are
>wonderful parts, but the large signal frequency response with a 100
>ohm load is less than desired for a 10 MHz distribution amplifier.
More information about the time-nuts