[Phil Allison[_4_]]

wrote:

------------------

Bewa this troll is e REAL lunatic


Please go into this in greater detail. My understanding is that when
using amplifiers, especially audio, the noise figure is a function of
the application - impedance levels, feeback and other external circuitry,
closed loop gain setting. etc. Therefore NF is usually not specified on
the data sheet


** Noise figure is widely used in electronics, predominately in RF circuits but also in low noise audio where connection to a transducer is is the game.

It does appear on many data sheets for BJTs and JFETs.

Eg.

https://pdf1.alldatasheet.com/datash...MI/2N4403.html

See figure 9 showing a set of curves for Ic, resistance at the input and NF.

For 1mA and 500ohms the NF is under 1dB at 1kHz and beyond.

At lower currents, the best noise figure is at much higher resistances.

See link for published project of mine originally posted 20 years ago.


https://sound-au.com/project66.htm

It matches or outperforms the SSM2017.

FFS go away dickhead.


....... Phil