Question 1. A pnp transistor with β = 60 is connected in a common-base configuration as shown in figure P5.8 (a) The emitter is driven by a constant-current source with IE = 0.75 mA. Determine IB, IC, α, and VC. (b) Repeat part (a) if IE = 1.5 mA. (c) Is the transistor biased in the forward-active mode for both parts (a) and (b)? Why or why not?
![1191_figure.jpg](http://secure.expertsmind.com/CMSImages/1191_figure.jpg)
Figure 5.8
Question 2. For all the transistors in Figure P5.17, β = 75. The results of some measurements are indicated on the figures. Find the values of the other labeled currents, voltages, and/or resistor values.
![1981_figure1.jpg](http://secure.expertsmind.com/CMSImages/1981_figure1.jpg)
Question 3. The transistor in the circuit shown in Figure P5.27 is biased with a constant current in the emitter. If IQ = 1 mA, determine VC and VE Assume β = 50.
![2229_figure2.jpg](http://secure.expertsmind.com/CMSImages/2229_figure2.jpg)
Question 4. For the circuit shown in Figure P5.29, if β = 200 for each transistor, determine: (a)IE1 (b) IE2, (c) VC1, and (d) VC2.
![2240_figure3.jpg](http://secure.expertsmind.com/CMSImages/2240_figure3.jpg)