61. Which of the following configurations has an output impedance Zo equal to RC?
(a) Fixed-bias common-emitter
(b) Common-emitter voltage-divider with bypass capacitor
(c) Common-emitter voltage-divider without bypass capacitor
(d) All of the above
62. Which of the following configurations has a voltage gain of –RC /re?
(a) Fixed-bias common-emitter
(b) Common-emitter voltage-divider with bypass capacitor
(c) Fixed-bias common-emitter and voltage-divider with bypass capacitor
(d) Common-emitter voltage-divider without bypass capacitor
63. What does the negative sign in the voltage gain of the common-emitter fixed-bias configuration indicate?
(a) The output and input voltages are 180º out of phase.
(b) Gain is smaller than 1.
(c) Gain is larger than 1.
(d) None of the above
64. For the common-emitter fixed-bias configuration, there is a ________ phase shift between the input and output signals.
(a) 0º
(b) 45º
(c) 90º
(d) 180º
65. What is the voltage gain of a feedback pair connection?
(a) 1
(b) –1
(c) 100
(d) –100
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BJT Amplifiers » Exercise - 1 1. Nota 2. The dc emitter current of a transistor is 8 mA. What is the value of re? (a) 320 (b) 13.3 k (c) 3.125 (d) 5.75 3. What is the most important r parameter for amplifier analysis? (a) rb (b) rc (c) (d) 4. Which of the h-parameters corresponds to re in a common-base configuration? (a) hib (b) hfb (c) hrb (d) hob 5. Under which of the following conditions is the output impedance of the network approximately equal to RC for a common-emitter fixed-bias configuration? (a) ro 10RC (b) ro 2 10RC (c) ro 2 ro (d) ro 4 ro 6. What is the unit of the parameter ho? (a) Volt (b) Ohm (c) Siemen (d) No unit 7. Which of the following gains is less than 1 for a common-base configuration? (a) Ai (b) Av (c) Ap (d) None of the above 8. Which of the following configurations has the lowest output impedance? (a) Fixed-bias (b) Voltage-divider (c) Emitter-follower (d) None of the above 9. Which one of the following configurations has the lowest input impedance? (a) Fixed-bias (b) Common-base (c) Emitter-follower (d) Voltage-divider? 10. The current gain for the Darlington…