Quote Originally Posted by djowel View Post
Hi,

I'm Joel (Cycfi research), I just want to clarify that 0.2dB is the Noise Figure specified by the transistor manufacturer for Toshiba 2SC3324. Noise figure (NF) is always in dB:

"The noise figure is the difference in decibels (dB) between the noise output of the actual receiver to the noise output of an “ideal” receiver with the same overall gain and bandwidth when the receivers are connected to matched sources at the standard noise temperature T0 (usually 290 K). The noise power from a simple load is equal to kTB, where k is Boltzmann's constant, T is the absolute temperature of the load (for example a resistor), and B is the measurement bandwidth."

Some links:

https://en.wikipedia.org/wiki/Noise_figure
https://www.mouser.com/datasheet/2/4...01-1150780.pdf


Regards,
--Joel
Hi Joel and welcome.

Thanks for the clarification. I'm always up for learning something new, and I hadn't come across that before, with Noise Figure having a specific meaning in this instance.