RL+Vcca VCE2. a) For the direct coupled class A amplifiershown, derive the expression for efficiencyin terms of maximum and minimum valuesof currents and voltages.b) Determine the maximum efficiency of thiscircuit.c) Derive the expression for maximumpower dissipation.www9wwwRBinVBE

a) Derive the Expression for Efficiency in Terms of Maximum and Minimum Currents & Voltages🧠…

Answered: RL +Vcc a VCE 2. a) For the direct…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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(a) What is the output current IO in the circuitshown if −VEE = −10 V andR = 20 ohm? Assume that the MOSFET is saturated.(b) What is the minimum voltage VDDneeded to saturate the MOSFET if VTN = 2.5 Vand K'n = 0.25 A/V2. (c) What must be the powerdissipation ratings of resistor R and the FET.
9. Design a biased-transistor circuit using VBB = Vcc= 10 V for a Q-point of Ic = 5 mA and VCE 4 V. Assume pc = 100. The design involves finding RB, RC, and the minimum power rating of the transistor. (The actual power rating should be greater.) Sketch the circuit.
In a full-bridge dc-dc converter using PWM bipolar voltage switching, analytically obtain the value of (V/V) which results in the maximum (peak-peak) ripple in the output current i,. Calculate this ripple in terms of Va, La, and f
1. The DC-DC converter has several circuit configurations. a) (Draw a simple connection of IGBT switch, diode and inductor that can discriminate between Buck, Boost and Buck-Boost converter circuits respectively.) b) ('A Boost converter produces an output voltage, Vo that is more than or equal to the input voltage, Vi. Based on this statement develop the equation for the relationship between Vo Viand D. where D represents the duty ratio. You can use any suitable diagram to illustrate your answer.)
The collector characteristics for a certain transistorare shown a. Find the ratio Ic/IB for VCE =10 V and IB =100,200, and 600 pA.b. The maximum allowable collector powerdissipation is 0.5 W for IB = 500 pA. Find VCE. Hint: A reasonable approximation for the power dissipatedat the collector is the product of the collector voltage andcurrent P = IcVCE, where P is the permissible powerdissipation, Ic is the quiescent collector current, and VCE iSthe operating point collector-emitter voltage.
Q1. (a) Consider the amplifier circuit in Figure Q1(a). Given the following: RI = 100 k2 R2 = 56 kN Rc =2 k2 Vcc = +8 V Assume the transistor has B = 100 and VBE(on) = 0.7 V. You may neglect Early effect and use VT = 26 mV. (i) Draw the DC equivalent circuit, then determine Iç and VCE. Draw the AC equivalent circuit using re model. Based on this, determine the parameters Av, Rin and Rout. (ii) Vcc Rc R1 R2 C3 Vout C2 Ci Vin Figure Q1(a)
5, a) Determine Vdsat when ID=.5 mA. b) Determine Kn when ID = 0.5 Amps. (Show your work!) c) Determine VTN. (Show your work!) d) Vgs Consider the circuit and corresponding graph, shown below. ID (mA) 0.60 0.50 0.40 0.30 0.20 0.10 0.00 0 0.5 Vds 1 1.5 2 2.5 Vds 3 3.5 4 4.5 5 -Vgs = 1V - Vgs = 1.1V - Vgs = 1.2V - Vgs = 1.3V
2. A single transistor amplifier is shown in the circuit to the right. The input is a 100 kHz sine wave from a very low impedance source, with a 1 mV peak-to-peak amplitude. hfe, the forward current gain of the transistor, is 300. The base reverse leakage current is 1 nA. The ideality factor for the base-emitter diode is 2, so nkT= 50 mV. a. What are the voltages relative to ground and the currents flowing into, into, and out from the collector, the base, and the emitter, respectively? b. What is the impedance of the 1 µF capacitors at 100 kHz and what effect will this have on the gain of the amplifier? c. What is the gain of the amplifier and how does it depend on the hfe of the transistor? Luff Vin maits Ik { +V₁ = +15V املا Vo Sik Y 1 Fb V₂ I m Vout MF 2K = 250 hfő - -15V --Y₂
The small-signal model is said to be valid for voltage variations of about 5 mV. To what percentage current change does this correspond? (Consider both positive and negative signals.) What is the maximum allowable voltage signal (positive or negative) if the current change is to be limited to 10%?
Exersice 4: For the Darlington amplifier circuit used in an emitter-follower configuration appears in figure below: . Determine the dc levels of Vi, Ve, Vi, Ves, and Ver. . Find the currents I, Iz, and Irz. . Calculate Zi and Zo. . Determine the voltage gain Ay = Vo/Vi and current gain Ai=IL/l;. . Repeat parts 1 to 4 with a load resistor of 1.2 kQ. . Evaluate A = Vo/Vs if the source has an internal resistance of 1.2 kQ and the applied load is 10 kQ. omAwWNE 416V L i prammm, I Tour i,
A transistor amplifier which uses a npn BJT and various passive components is shown in figure Q1. A table of components values is shown in Table Q1. For this amplifier: a) Calculate the following dc voltages and currents; VB, VE, le and le. b) Draw a r parameter ac small-signal model. The model should be correctly labelled with transistor voltages and all small-signal parameters. Detail assumptions and limitations. c) Calculate the small-signal input resistance Rin, output resistance Rout and output voltage Vout. Detail assumptions and limitations. d) Calculate the small-signal voltage and current gain Av and A. Also calculate the output voltage. Vcc R3 R. R: Figure Q1 R3 = 2 kQ Vin = 10 mV Table of Component values and Transistor Parameters R2 = 10 kQ VT = 24 mV R1 = 40 kQ R4 = 1 kQ VBE = 0.7 V B = 200 %3D Vcc = 10 V C=2mF
6. Build the circuit shown in Figure 2 below in PSpice. Note that the power supply V1 is a VSIN power supply in the SOURCE library. Vcc is a VDC supply found in the SOURCE library. Model this circuit using the Time Domain (Transient) Analysis Type with a Run To Time of 2 ms. A. Paste your output graph showing the voltage at the base terminal, collector terminal and at the load. B. What is the voltage gain of the circuit? (Compare the voltage amplitude at the base terminal input (across Rb2) to that at the collector terminal. C. What happens to the output voltage at the collector terminal if the value of Rb1 is reduced by a factor of 10 (to 14.7 kn)? Simulate this situation and explain the result. D. What happens to the output voltage at the collector terminal if the value of Rb1 is increased by a factor of 3 (to 441 k)? Simulate this situation and explain the result. Rb1 RC 147k 1k C2 C1 Q1 Vcc 1u VOFF = 0 Q2N3904 10Vdc VAMPL = 0.1V1 1u FREQ = 2k R_load Rb2 Re AC = 0 250 40k 20 Figure…

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RL +Vcc a VCE 2. a) For the direct coupled class A amplifier shown, derive the expression for efficiency in terms of maximum and minimum values of currents and voltages. b) Determine the maximum efficiency of this circuit. c) Derive the expression for maximum power dissipation. www 9 www RB in VBE