Chapter 9, Problem D9.55P

Figure P9.55 shows a phototransistor that converts light intensity into an output current. The transistor must be biased as shown. The transistor output versus input characteristics are shown. Design a current-to-voltage converter toproduce an output voltage between 0 and 8 V for an input light intensity between 0and $\text{2}0\text{ mW}/{\text{cm}}^{\text{2}}$ . Power supplies of $+10V$ and $-10V$ are available.