Basic Engineering Circuit Analysis
11th Edition
ISBN: 9781118992661
Author: Irwin, J. David, NELMS, R. M., 1939-
Publisher: Wiley,
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Textbook Question
Chapter 4, Problem 14P
Determine the gain of the amplifier in Fig. P4.14. What is the value of
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4.90 A reverse-biased photodiode is specified to have a dark current of 100 pA and a responsivity of 0.5 A/W. It is
connected to the transresistance amplifier shown in Fig. P4.90. Assume an ideal op amp.
(a) What is the reverse-bias voltage across the photodiode?
(b) What is the output voltage vo with no illumination?
(c) What is the output voltage vo with 10 µW of light incident on the photodiode?
250 kN
On o
+3 V.
Figure P4.90
Hint: since we are assuming an ideal op amp, there is a virtual short-circuit between
input terminals.
For the amplifier in Fig. P4.15, find the gain
(R1=3.5 kQ, R2=27 KQ)
2
VS
R₂
R₁
-OV
4.27 Design an op-amp circuit that performs an averaging
operation of five inputs v₁ to v5.
Chapter 4 Solutions
Basic Engineering Circuit Analysis
Ch. 4 - An amplifier has a gain of 15 and the input...Ch. 4 - An amplifier has a gain of 5 and the output...Ch. 4 - An op-amp based amplifier has supply voltages of...Ch. 4 - For an ideal op-amp, the voltage gain and input...Ch. 4 - Revisit your answers in Problem 4.4 under the...Ch. 4 - Revisit the exact analysis of the inverting...Ch. 4 - Revisit the exact analysis of the inverting...Ch. 4 - An op-amp based amplifier has 18V supplies and a...Ch. 4 - Assuming an ideal op-amp, determine the voltage...Ch. 4 - Assuming an ideal op-amp, determine the voltage...
Ch. 4 - Assuming an ideal op-amp in Fig. P4.11, determine...Ch. 4 - Assuming an ideal op-amp, find the voltage gain of...Ch. 4 - Assuming an ideal op-amp in Fig. P4.13, determine...Ch. 4 - Determine the gain of the amplifier in Fig. P4.14....Ch. 4 - For the amplifier in Fig. P4.15, find the gain and...Ch. 4 - Using the ideal op-amp assumptions, determine the...Ch. 4 - Using the ideal op-amp assumptions, determine...Ch. 4 - In a useful application, the amplifier drives a...Ch. 4 - The op-amp in the amplifier in Fig. P4.19 operates...Ch. 4 - For the amplifier in Fig. P4.20, the maximum value...Ch. 4 - For the circuit in Fig. P4.21, (a) find Vo in...Ch. 4 - Find Vo in the circuit in Fig. P4.22, assuming...Ch. 4 - The network in Fig. P4.23 is a current-to-voltage...Ch. 4 - Prob. 24PCh. 4 - Determine the relationship between v1 and io in...Ch. 4 - Find Vo in the network in Fig. P4.26 and explain...Ch. 4 - Determine the expression for vo in the network in...Ch. 4 - Show that the output of the circuit in Fig. P4.28...Ch. 4 - Find vo in the network in Fig. P4.29.Ch. 4 - Find the voltage gain of the op-amp circuit shown...Ch. 4 - Determine the relationship between and in the...Ch. 4 - Prob. 32PCh. 4 - For the circuit in Fig. P4.33, find the value of...Ch. 4 - Find Vo in the circuit in Fig. P4.34.Ch. 4 - Find Vo in the circuit in Fig. P4.35.Ch. 4 - Determine the expression for the output voltage,...Ch. 4 - Determine the output voltage, of the noninverting...Ch. 4 - Find the input/output relationship for the current...Ch. 4 - Find V0 in the circuit in Fig. P4.39.Ch. 4 - Find Vo in the circuit in Fig. P4.40.Ch. 4 - Find the expression for in the differential...Ch. 4 - Find vo in the circuit in Fig. P4.42.Ch. 4 - Find the output voltage, vo, in the circuit in...Ch. 4 - The electronic ammeter in Example 4.7 has been...Ch. 4 - Given the summing amplifier shown in Fig. 4PFE-l,...Ch. 4 - Determine the output voltage V0 of the summing...Ch. 4 - What is the output voltage V0 in Fig. 4PFE-3. a....Ch. 4 - What value of Rf in the op-amp circuit of Fig....Ch. 4 - What is the voltage Vo in the circuit in Fig....
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- Consider the amplifier shown below. Assume R4=100 k2, R2 = 30 k2, B = 100, VT-25 mV and VA-150V. Assume Vc=1.2V. !3! %3D a) Sketch the small-signal equivalent circuit of the amplifier. b) Find the input resistance Rin. L. c) Find the value of vo If v= 8 mv. d) Explain in your own words, what will happen in the performance of the amplifier if the bypass capacitor is removed. +5 V Re=7 ko Ca R = 10 ka R2 CE 2 ka -5V Maximum size for new files: 10MB, maximum attachments:: ww HH ww wwarrow_forward9 + R₂ 2 www R₁ Figure Q4.b(ii) 1) Draw the compete circuit with the op-amp included. 2) Obtain equations for the contribution made by each of the bias current sources IBp, IBn and the voltage offset source Vos to the output voltage Vo. 3) Suggest how the value chosen for R3 will be related to R₁ and R₂.arrow_forwardPlease help with A,B and C. Also, please make it legible sometimes it's too small so it's blurry.arrow_forward
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- Please help with B,C, and D. Also, please make it legiable sometimes it's too small so it's blurry.arrow_forward4) Below is the small signal model of a multistage amplifier. Using this model, write the equationsthat you would need to determine the voltagegain. IMPORTANT: You only need to providethe equations that you would need to determinethe voltage gain. You DO NOT need to combine and simplify the equationsto determine a final expression for the voltagegain. Vin Vo Vb vo1 Rb R13 Vbe1 Vbe2 'e gm 1 Vbe1 gm 2 Vbe2 Rc2 Rc1 Rearrow_forwardFigure QI shows the circuit diagram of a "Logarithmic Amplifier". In this circuit the feedback resistor of a normal inverting amplifier is replaced by a silicon diode. Since the current flowing through the diode increases exponentially with the voltage across the diode, the voltage across the diode will be proportional to the logarithm current flowing through it. Hence the output of the circuit is proportional to the logarithm of the input voltage. QI DI RIN Al Figure QI The current flowing through a diode is given by the Shock' y Diode Equat n: 1,=1, (e" =1) where , is the current flowing through the diode g is the charge on the electron (given at the back of the examination sheet) V, is the voltage across the diode K, is Boltzmann's constant (given at the back of the examination sheet) Tis room temperature (given at the back of the examination sheet) Given that /,> 1, an approximate expression for V, as a function of I, is Continued overleaf Page 2 of 9 QI (a) 0) Neglecting any input…arrow_forward
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What is a Power Amplifier, And Do I Need One?; Author: Sweetwater;https://www.youtube.com/watch?v=2wkmSm4V00M;License: Standard Youtube License