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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

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

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

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

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