Noise in BJT. The objective is to determine , and for a bipolar transistor. The hybrid- model that includes the noise sources is shown below Fig 5-3
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Noise in BJT
The objective is to determine , and for a bipolar transistor.
The hybrid- model that includes the noise sources is shown below
The feedback elements . This is OK for frequency < . At frequencies above that value the noise mechanisms are partially correlated.
is caused by the thermal noise of the base-spreading resistance. the noise current generator is the shot noise of the total base current, and is the shot noise of the collector current.
The 1/f noise contribution is represented by a single noise current generator which flows through the entire base resistance. The spectral density of 1/f noise is given by