The circuit of Figure P15.5 may be used for
operation of a photodiode. The voltage VD is a reverse-bias voltage large
enough to make diode current, iD, proportional to the incident light intensity,
H. Under this condition, iD/H = 0.5 µA-m2 /W.
a. Show that the output voltage, Vout,
varies linearly with H.
b. If H = 1,500 W/m2, VD = 7.5 V, and an
output voltage of 1 V is desired, determine an appropriate value for RL.
