modulation (PWM). Or some combination of all the above.
Any suggestions on topologies and/or candidate parts? One possibility for
fine tuning might be the AD5791.
Lifespeed
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noise floor you were getting with this bias, or was that
not a figure of merit for the cryo LNAs? Even though an opamp circuit can
be designed for low noise, probably large passive filtering components would
be required to tamp down the broadband noise.
Lifespeed
and impedance matching for low noise figure will all be important.
Lifespeed
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-Original Message-
From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of John
Miles
Sent: Thursday, January 9, 2020 10:23 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] low phase noise, noise floor and noise figure
amplifier at
/f AM and PM Noise" linked on the NIST site and elsewhere.
https://tf.nist.gov/general/pdf/1139.pdf
Thanks,
Lifespeed
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at that frequency with a transformer.
Nor do I need to control the gain, which is one of the features of the
transformer-feedback topology. I was thinking about common emitter with
inductive emitter degeneration. Not sure cascode is right for this UHF
application.
Lifespeed
nd this
has done before and is just a matter of designing the correct implementation
in FPGA DSP processing fed by a flip-flop phase detector and 10 X 10^6
divider. I would be glad to hear about any good books or white papers on
the subject.
Lifespeed
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