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7-31. What is the predicted voltage gain of the circuit in Figure 7-52? 10 ΚΩ ΙΚΩ ww ww11 +6V 470 Ω FIGURE 7-52 ο +12V την 1 ΚΩ 1H11 Mi 1 ΚΩ

7-31. What is the predicted voltage gain of the circuit in Figure 7-52? 10 ΚΩ ΙΚΩ ww ww11 +6V 470 Ω FIGURE 7-52 ο +12V την 1 ΚΩ 1H11 Mi 1 ΚΩ

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Refer to Figure 7-52 on page 281. Answer question 7-31. Predict the answer with a mathematical approach.

If the emitter bypass capacitor opens up, what is the new voltage gain value?

 

 

If a .5 mill-volt peak-to-peak sinewave signal is applied to the base, what would the output signal look like at the collector? The "I" markers below indicate the start of a cycle, the midpoint of a cycle, and the endpoint of a cycle in the order presented. Indicate the peak values for each of the half cycles both for the input and the output signals. Note: “------" indicates the DC voltage level the sinewave is riding on. Input signal (left side of Cin) > Input signal (right side of Cin) > Output signal (left side of Cout) > Output signal (right side of Cout) > Emitter signal (top side of Cbypass)> ·| -1 The DC voltage level = ? The DC voltage level = ? The DC voltage level = ? The DC voltage level = ? The DC voltage level = ?
Transcribed Image Text:If a .5 mill-volt peak-to-peak sinewave signal is applied to the base, what would the output signal look like at the collector? The "I" markers below indicate the start of a cycle, the midpoint of a cycle, and the endpoint of a cycle in the order presented. Indicate the peak values for each of the half cycles both for the input and the output signals. Note: “------" indicates the DC voltage level the sinewave is riding on. Input signal (left side of Cin) > Input signal (right side of Cin) > Output signal (left side of Cout) > Output signal (right side of Cout) > Emitter signal (top side of Cbypass)> ·| -1 The DC voltage level = ? The DC voltage level = ? The DC voltage level = ? The DC voltage level = ? The DC voltage level = ?
age an age too 5 V Solve the following problems. 7-30. What is the approximate ac emitter resistance of a com- mon-emitter amplifier with a dc emitter current of 6.25 mA? 7-31. What is the predicted voltage gain of the circuit in Figure 7-52? 10 ΚΩ 1 kQ ww +6 V 470 Ω FIGURE 7-52 9 +12 V WWW 1 kQ ww 311 SMALL-SIGNAL AMPLIFIERS 1 ΚΩ 281 7-32. What is the equivalent ac base resistance (Rbase) in Figure 7-52 if the input signal current is 25 μA and the output signal current is 4.6 mA? 7-33. What is the forward transconductance of a JFET whose drain current changes from 6.4 mA to 6.2 mA when the gate-to-source bias voltage changes from -1.5 V to -1.6 V? 7-34. What is the predicted voltage gain of a MOSFET com- mon-source amplifier with a forward transconductance of 5 mS and an ac drain resistance of 1.5 kQ? The following problems are more challenging. 7-35. A common-emitter amplifier has the following values: Vb = 9 mV, Re 15 ΚΩ, re 9 , RE 330 2. Find Av, Vouts and dB gain. = = = = = 7-36. A common-emitter amplifier with voltage divider bias has the following values: Bac = 190, IE = 4.73 mA, RE = 560 , R₁ = 10 k, R₂ 3.3 k. Find res Roase, and Zin. 7-37. A common-emitter amplifier has the following values: Zin 7.5 ΚΩ, Rc 1.5 ΚΩ, re 13.6 Ω, RE = 820 . The amplifier is connected to a 120 mV signal source with an internal resistance of 1.2 k. Find the base volt- age V₁, voltage gain A,, output voltage Vout, and dB gain. -
Transcribed Image Text:age an age too 5 V Solve the following problems. 7-30. What is the approximate ac emitter resistance of a com- mon-emitter amplifier with a dc emitter current of 6.25 mA? 7-31. What is the predicted voltage gain of the circuit in Figure 7-52? 10 ΚΩ 1 kQ ww +6 V 470 Ω FIGURE 7-52 9 +12 V WWW 1 kQ ww 311 SMALL-SIGNAL AMPLIFIERS 1 ΚΩ 281 7-32. What is the equivalent ac base resistance (Rbase) in Figure 7-52 if the input signal current is 25 μA and the output signal current is 4.6 mA? 7-33. What is the forward transconductance of a JFET whose drain current changes from 6.4 mA to 6.2 mA when the gate-to-source bias voltage changes from -1.5 V to -1.6 V? 7-34. What is the predicted voltage gain of a MOSFET com- mon-source amplifier with a forward transconductance of 5 mS and an ac drain resistance of 1.5 kQ? The following problems are more challenging. 7-35. A common-emitter amplifier has the following values: Vb = 9 mV, Re 15 ΚΩ, re 9 , RE 330 2. Find Av, Vouts and dB gain. = = = = = 7-36. A common-emitter amplifier with voltage divider bias has the following values: Bac = 190, IE = 4.73 mA, RE = 560 , R₁ = 10 k, R₂ 3.3 k. Find res Roase, and Zin. 7-37. A common-emitter amplifier has the following values: Zin 7.5 ΚΩ, Rc 1.5 ΚΩ, re 13.6 Ω, RE = 820 . The amplifier is connected to a 120 mV signal source with an internal resistance of 1.2 k. Find the base volt- age V₁, voltage gain A,, output voltage Vout, and dB gain. -
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