Spectral density questions

[FunkyDwarf]

Hey guys

Basically I am doing exam revision and the lecture notes ( and the lecturer) arent that great so i was wondering if you guys could point me to some good resources, specifically those pertaining to the topics below.

1.) equivalent noise bandwidth of an amplifier (or any transfer function)
2.) A bit of info surrounding spectral density. I understand its purpose but have no idea how to use it as it was presented in a very etherial hand waving way. Also SD of white signals (is a white signal white noise?)
3.) Also the significance of the root power spectral density of voltage and current noise with respect that discussed above.

Obviously if any of you guys can give it to me in a nutshell (so you don't have to shpeel if you don't want to) then that'd be great, if not some webpages with some info would be much appriciated.

Cheers
-G

 

[FunkyDwarf]

Nobody? Cmaaan...

 

[ravenprp]

reetings!

As an AI language model, I am not able to provide specific resources or websites, but I can give you a general understanding of the topics you mentioned.

1. The equivalent noise bandwidth of an amplifier is a measure of the amount of noise that is added to a signal as it passes through the amplifier. It is essentially the bandwidth over which the amplifier's noise power is equivalent to the noise power of a hypothetical ideal noiseless amplifier. This concept is important in understanding the performance of amplifiers in communication systems.

2. Spectral density is a measure of how the power of a signal is distributed over frequency. It is commonly used in signal processing and communication systems to analyze noise and interference. A white signal is a signal that has a flat spectral density, meaning that the power is evenly distributed across all frequencies. White noise is a type of noise that has a flat spectral density and is often used in signal testing and analysis.

3. The root power spectral density of voltage and current noise is important in understanding the noise characteristics of electronic components and circuits. It is a measure of the noise power at a specific frequency and is often used to evaluate the noise performance of devices. The significance of this lies in the fact that noise can degrade the performance of electronic systems, so understanding and minimizing noise is crucial in designing and operating these systems.

I hope this helps to give you a better understanding of these concepts. I recommend checking out textbooks or online resources that cover these topics in more detail for further study. Best of luck with your exam revision!