Hi Rick:
Thanks for the patent number.
http://www.google.com/patents/about?id=Y4MCAAAAEBAJ&dq=3624536
High-Dynamic-Range Amplifier, David E. Norton, Adams-Russell, Nov 30,
1971, *330/53* ; 330/293; 330/295; 330/68
Have Fun,
Brooke Clarke
http://www.PRC68.com
Rick Karlquist wrote:
Bruce Griffiths wrote:
Rick Karlquist wrote:
Bruce Griffiths wrote:
He's made similar comments before.
It actually isnt that difficult to achieve an isolation amplifier phase
noise floor below -170dBc/Hz if one is careful to use appropriate
parts,
design techniques, and the input signal level is high enough.
The real problem is verifying that performance.
The 10811 production engineers searched for a long time for
a low noise buffer amplifier and settled on the ANZAC AMC-123.
The data sheet refers to a patent that reads like
a construction article. You can make your own if you can find
an old 2N5109 transistor.
Rick Karlquist N6RK
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