7. For a common-emitter amplifier, Rc= 1.0 k2, RE = 390 2, r'.- 15 2, and Bac=75. Assuming that Rg is completely bypassed at the operating frequency, the voltage gain is: (a) 66.7 (b) 2.56 (c) 2.47 (d) 75 9. In a certain emitter-follower circuit, the current gain is 50. The power gain is approximately: (c) I (a) 50AV (b) 50 (d) answers (a) and (b) 10. In a Darlington pair configuration, each transistor has an ac beta of 125. If RE is 560 Q, the input resistance is: (a) 560 N (b) 70 kN (c) 8.75 MQ (d) 140 kN

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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6. If a 10 mV signal is applied to the base of the emitter-follower circuit in Question 5, the output signal is
approximately
(a) 100 mV
(b) 150 mV
(c) 1.5 V
(d) 10 mV
7. For a common-emitter amplifier, Rc = 1.0 k2, RE = 390 2, r'.= 15 Q, and Buc = 75. Assuming that Rg is
completely bypassed at the operating frequency, the voltage gain is:
(a) 66.7
(b) 2.56
(c) 2.47
(d) 75
9. In a certain emitter-follower circuit, the current gain is 50. The power gain is approximately:
(c) I
(a) 50AV
(b) 50
(d) answers (a) and (b)
10. In a Darlington pair configuration, each transistor has an ac beta of 125. If RE is 560 2, the input
resistance is:
(a) 560 2
(b) 70 k2
(c) 8.75 M2
(d) 140 k2
11. The input resistance of a common-base amplifier is
(a) very low
(b) very high
(c) the same as a CE
(d) the same as a CC
12. In a common-emitter amplifier with voltage-divider bias, Rintbase) = 68 k2, R, =33 k2, and R2 =15 k2.
The total input resistance is:
(a) 68 k2 (b) 8.95 k2
(c) 22.2 k2
(d) 12.3 k2
Transcribed Image Text:6. If a 10 mV signal is applied to the base of the emitter-follower circuit in Question 5, the output signal is approximately (a) 100 mV (b) 150 mV (c) 1.5 V (d) 10 mV 7. For a common-emitter amplifier, Rc = 1.0 k2, RE = 390 2, r'.= 15 Q, and Buc = 75. Assuming that Rg is completely bypassed at the operating frequency, the voltage gain is: (a) 66.7 (b) 2.56 (c) 2.47 (d) 75 9. In a certain emitter-follower circuit, the current gain is 50. The power gain is approximately: (c) I (a) 50AV (b) 50 (d) answers (a) and (b) 10. In a Darlington pair configuration, each transistor has an ac beta of 125. If RE is 560 2, the input resistance is: (a) 560 2 (b) 70 k2 (c) 8.75 M2 (d) 140 k2 11. The input resistance of a common-base amplifier is (a) very low (b) very high (c) the same as a CE (d) the same as a CC 12. In a common-emitter amplifier with voltage-divider bias, Rintbase) = 68 k2, R, =33 k2, and R2 =15 k2. The total input resistance is: (a) 68 k2 (b) 8.95 k2 (c) 22.2 k2 (d) 12.3 k2
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