Re: Help plz..urgent!!!
I'm gonna explain it with little theory.
A circuit's bandwidth is a interval of frequencies where the ouput signal has the same amplitude (or almost the same) has the input signal. This means the signal passes through tat RLC circuit without beign changed or attenuated. This allows you to create filters.
Imagine a filter with bandwith of 1kHz [from 0 Hz to 1 KHz].
For signals with frequency between 0 Hz and 1 kHz: Vout = Vin
For signals with frequency over 1 kHz: Vout < Vin
A ressonant filter has the same behaviour, with a little exception. At the ressonant frequency the circuit HAS SOME GAIN without using an amplifier, which is odd but good
. It also allows to make "better" filters with the same number of components.
Ressonant circuits are used to filter signals like, for example, in a radio. The filter allows the signal of the radio station you want to hear, to pass while all the other radio stations are rejected. The better the quality factor, the better your radio filter will reject unwanted stations.
Sidebands is something that appears due to amplitude modulation. But thats harder to explain but also very important in radio communication. Wen you transmit voice over radio you have to change your voice signal frequency to radio frequency, for example 1 MHz. The result is a signal centered at 1 MHz (carrier) with your voice signal around it, spread between 0.980MHz and 1,020 MHz. Those spread frequencies make up your sideband.
Hope it helped