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Define the function of photodetectors in fibre optic communication system.
Photo-detectors:
At the receiver end, conversion of optical signal into analog signal is being done with the help of photo detectors for example photodiode. The photo detectors are required to have
a. High quantum efficiency photon to electron (e-) conversion efficiency
b. Sufficient frequency response speed of response
c. Low dark current: low leakage current into a reverse biased diode within the absence of illumination
d. Low signal dependent noise capable to respond for signal quite than noise
a) A circuit has a voltage of 15V and a current of 2A. the phase angle is 45 degree. Verify the true power of the circuit? (Calculate apparent and true power) b) Verify the appare
When the two junctions of a thermo couple are maintained at dissimilar temperatures, then a light begins going through the loop called as thermo electric current.
a) Three equivalent charges 2.0 micro coulomb each, are held fixed at the three corners of an equilateral triangle of side 5 cm. Determine the Coulomb force experienced at its cent
what is it?
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