airboss
Member level 3
Hi,
I have some questions about noise calculation.
1) we know if a transistor or a resistor is tied with a capacitor, the total noise power is kT/C. my question is, could the C be an intrinsic capacitor of a transistor?
2) the following question is for a on-going project. i really need some clues. the schematic is attached as follows. it is a sense amplifier. i want to see at which time point would the noise cause an error at the output. my advisor asked me to find the mathematical solution of input referred noise and then do the simulation.
here's my question. how should i do it? i think there're two possibilities.
a)at point A & B, they're acting like capacitors. A & B are close to the input fets as well. so we should know how much (noise power) A&B will have and then refer it to the input and see the effects.
b)we should see the noise power at OPl & OPr and then refer it to the input.
which one above is correct?
i really appreciate any feedback!
I have some questions about noise calculation.
1) we know if a transistor or a resistor is tied with a capacitor, the total noise power is kT/C. my question is, could the C be an intrinsic capacitor of a transistor?
2) the following question is for a on-going project. i really need some clues. the schematic is attached as follows. it is a sense amplifier. i want to see at which time point would the noise cause an error at the output. my advisor asked me to find the mathematical solution of input referred noise and then do the simulation.
here's my question. how should i do it? i think there're two possibilities.
a)at point A & B, they're acting like capacitors. A & B are close to the input fets as well. so we should know how much (noise power) A&B will have and then refer it to the input and see the effects.
b)we should see the noise power at OPl & OPr and then refer it to the input.
which one above is correct?
i really appreciate any feedback!