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## Homework Statement

The output of a sensor which produces 10000 electrons is connected to parallel RC circuit with Resistance= 50 ohm, and the capacitance=10pF.

Calculate the signal to noise ratio at temperature 300K.

## Homework Equations

SNR= 10 log (power of signal/ power of noise)

Or SNR = 20log ( voltage signal / voltage noise)

## The Attempt at a Solution

Voltage=C/Q=624.15V

Power of signal= voltage square / resistance= 7791.2 J

But how to calculate power of noise? The thermal noise = 4kTf, where k is boltzman constant, f is frequency bandwidth. Yet not given , but I can only think of these formula for thermal noise and 10000 electron need to include shot noise?

Please help