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What is Equivalent Noise Bandwidth?
it is nothing but equivalent B.W
What are the limitations of an amplifier?
Amplifiers have several limitations, including limited bandwidth, which can restrict their performance at certain frequencies. They also have a maximum output power, beyond which distortion occurs, affecting signal fidelity. Additionally, amplifiers can introduce noise and distortion into the signal, impacting overall sound quality. Furthermore, thermal effects can lead to performance degradation over time, especially under heavy load conditions.
How the noise is overcome with the help of positive feedback amplifier?
A: With positive feedback the amplifier is saturated one way or the other in a quiescent state no signal or noise input can effects its output
Why to have a filter before and after a low noise amplifier?
To cut off unwanted frequencies, unwanted frequencies are called noise.
Which factor affect data rate of a link?
the bandwidth and the signal to noise ratio
What happens when the bandwidth of the amplifier increases?
When the bandwidth of an amplifier increases, it means the amplifier can process a wider range of frequencies. This can result in better signal quality and improved overall performance of the amplifier. However, increasing bandwidth may also lead to increased noise and distortion in the output signal.
How thermal noise is derived as KTB?
Thermal noise is derived as KTB where K is the Boltzmann constant (1.38 x 10^-23 J/K), T is the temperature in Kelvin, and B is the bandwidth of the system. This equation relates the power of thermal noise to the temperature and bandwidth of a system, with higher temperatures and wider bandwidths resulting in higher levels of thermal noise.
What factors control the voltage of a Johnson noise source?
It is the bandwidth, the temperature, and the resistance. Look at the link: "Calculation of Noise voltage: Thermal noise".
Advantages of large bandwidth?
A very usefull advantage is the exchange of SNR(signal to noise ratio) with Bandwidth... as on increasing the bandwidth the power required for transmission get reduced to a great extent.. is given by the formula SNR2 ~ (SNR1) B1/B2 AS we can see on increasing the bandwidth the SNR is reduced greatly
Thermal noise power in a conductor is proportional to?
Thermal noise is the noise generated by thermal agitation of electrons in a conductor. The noise power "P" in Watts , is given by "P=KTB". The movement or agitation of atoms in conductors and resistors is somewhat random and determined by the temperature of the conductor or resistor. The random movement of electrons is brought about bythermal agitation of the atoms that tends have increased energy as the temperature rises. This random movement gives rise to electrical voltages within the circuitry known as either, thermal noise, resistor noise, Johnson noise or circuit noise. This noise is existent across the frequency spectrum, meaning the more bandwidth occupied the likelihood of greater exposure.Example:K = Boltsmans Constant = 1.3807x10^-23T = Temperature (Kelvin) = 273K + 20 º CB = Bandwidth (Hz) = 180x10^3Noise Power = K x T x B
What does the shannon capacity have to do with communication?
It has to do with data communication. It is called the Shannon channel capacity theory where double the bandwidth equals double the highest data rate. This is of course theoretically and does not take into account white noise (thermal noise), impulse noise, attenuation distortion or delay distortion.
What does shannon capacity have to do with communications?
It has to do with data communication. It is called the Shannon channel capacity theory where double the bandwidth equals double the highest data rate. This is of course theoretically and does not take into account white noise (thermal noise), impulse noise, attenuation distortion or delay distortion.
How does cable noise effect voip?
It will reduced bandwidth internet connection, therefore the voice signal will be transmitted into larger frame rate resulting to a choppy voice or voice echo.
What is the relation between Noise Bandwidth and 3-dB bandwidth in ideal systems?
Bn>B3bn
What is Equivalent Noise Bandwidth?
it is nothing but equivalent B.W
What is the thermal noise level of a channel with bandwidth of 10 kHz carrying 1000 watts of power operating at 300 degrees?
The thermal noise level can be calculated using the formula N = sqrt(4kTBW), where k is the Boltzmann constant (1.381 x 10^-23 J/K), T is the temperature in Kelvin (300 + 273 = 573 K), and BW is the bandwidth (10 kHz = 10,000 Hz). Plugging in these values, we get N = sqrt(41.381e-2357310000) = 1.68 x 10^-18 W/Hz. This is the power spectral density of the thermal noise in the channel.
What are the key features and advantages of a travelling wave tube amplifier?
A travelling wave tube amplifier is a device used to amplify microwave signals. Its key features include high power output, wide bandwidth, and low noise. The advantages of a travelling wave tube amplifier are its efficiency in amplifying high-frequency signals, its ability to handle high power levels, and its reliability in harsh environments.
