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Measuring Thermal Noise of Amplifier

Question asked by VNA123 on May 21, 2018
Latest reply on May 29, 2018 by VNA123



My company designs wideband active CTLE amplifiers used in high speed serdes channel application. I have an N5222A VNA and am wondering if I can measure the thermal noise output of this amplifier. I would like to then take this power spectral plot and integrate and calculate the RMS value and use this in signal integrity simulations assuming a Gaussian PDF. The amplifier I'm talking about has a 100Ohm differential 50Ohm single ended input and output impedance. I've seen some people use only KTB as the noise and some other use 4*R*KTB.


Any suggestions on how to do this properly or if possible on my VNA?