[time-nuts] how to find low noise transistors (was: Firmware and antenna for Stanford Research FS700)

Attila Kinali attila at kinali.ch
Sat Jul 18 05:16:14 EDT 2015


On Fri, 17 Jul 2015 23:25:10 -0400
Charles Steinmetz <csteinmetz at yandex.com> wrote:

> A pair of Zetex (Diodes, Inc.) 
> ZTX849 or FZT849 actually have significantly lower voltage noise than 
> either the LM394 or MAT12.

I always wonder how you figure out whether a transistor is low noise
or not. What part of the datasheet hints at which transistors have low
noise and which have not? Even if it's just try and measure, how
do you find good candidates to measure?

			Attila Kinali

-- 
I must not become metastable. 
Metastability is the mind-killer.
Metastability is the little-death that brings total obliteration.
I will face my metastability. 
I will permit it to pass over me and through me. 
And when it has gone past I will turn the inner eye to see its path. 
Where the metastability has gone there will be nothing. Only I will remain.



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