Enter the current, bandwidth, and charge into the calculator to determine the shot noise. This calculator helps to estimate the shot noise level in electrical circuits.
Shot Noise Formula
The following formula is used to calculate the shot noise:
SN = √(2 * Q * I * B)
Variables:
- SN is the shot noise (amperes)
- Q is the charge of an electron (coulombs)
- I is the current (amperes)
- B is the bandwidth (Hz)
To calculate the shot noise, multiply the charge of an electron by the current and the bandwidth, then take the square root of the product multiplied by 2.
What is Shot Noise?
Shot noise is a type of electronic noise that occurs due to the discrete nature of electric charge. It is caused by the random fluctuations in the electric current when the carriers of charge, such as electrons, travel through a conductor or semiconductor. Shot noise is significant in electronic devices such as operational amplifiers, resistors, and diodes, especially when dealing with low levels of current in high-bandwidth systems.
How to Calculate Shot Noise?
The following steps outline how to calculate the shot noise:
- First, determine the current (I) in the circuit in amperes.
- Next, determine the bandwidth (B) of the system in hertz (Hz).
- Next, determine the charge (Q) of an electron in coulombs (typically 1.602 x 10^-19 C).
- Next, gather the formula from above = SN = √(2 * Q * I * B).
- Finally, calculate the shot noise (SN) in amperes.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Current (I) = 0.002 amperes
Bandwidth (B) = 1000 Hz
Charge (Q) = 1.602 x 10^-19 coulombs
