
Concept explainers
For the circuit in Fig. 4.109, find the Thevenin equivalent between terminals a and b.
Figure 4.109

Find the Thevenin voltage and Thevenin resistance at terminals a-b of the circuit shown in Figure 4.109.
Answer to Problem 42P
The Thevenin voltage is
Explanation of Solution
Given data:
Refer to Figure 4.109 in the textbook.
The voltage source is
The current source is
Calculation:
In the given circuit, find the Thevenin resistance by turning off
The modified circuit is shown in Figure 1.
In Figure 1,
The modified circuit is shown in Figure 2.
In Figure 2, the three
For the delta connection in Figure 3, the value of the resistor
Similarly,
And,
The modified circuit is shown in Figure 4.
In Figure 4,
The modified circuit is shown in Figure 5.
In Figure 5, the Thevenin resistance is,
Refer to Figure 4.109 in the textbook.
The given circuit is modified as shown in Figure 6.
In Figure 6, the voltage source with series resistance is converted into current source with parallel resistance by source transformation method.
That is,
Similarly, the current source with parallel resistance is converted into voltage source with series resistance by source transformation method.
That is,
The source transformation is shown in Figure 7.
In Figure 7,
The modified circuit is shown in Figure 8.
In Figure 8, the current source with parallel resistance is converted into voltage source with series resistance by source transformation method.
That is,
The source transformation is shown in Figure 9.
In Figure 9, apply Kirchhoff’s voltage law to the loop
Rearrange the equation (1) as follows,
In Figure 9, apply Kirchhoff’s voltage law to the loop
Substitute
Substitute 0 for
In Figure 9, apply Kirchhoff’s voltage law to the outer loop as follows.
Substitute 0 for
Since, the voltage
The Thevenin equivalent is shown in Figure 10.
Conclusion:
Thus, the Thevenin voltage is
Want to see more full solutions like this?
Chapter 4 Solutions
EBK FUNDAMENTALS OF ELECTRIC CIRCUITS
Additional Engineering Textbook Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Electric Circuits. (11th Edition)
Database Concepts (8th Edition)
Thermodynamics: An Engineering Approach
Modern Database Management
Starting Out with C++ from Control Structures to Objects (9th Edition)
- I have uploaded the rules, please explain step by step and which rule you have appliedarrow_forwardUsing the CCS Compiler method to solve this question Write a PIC16F877A program that flash ON the 8-LED's connected to port-B by using two switches connected to port-D (Do & D₁) as shown in figure below, according to the following scenarios: (Hint: Use 500ms delay for each case with 4MHz frequency) 1. When Do=1 then B₁,B3,B7 are ON. 2. When Do 0 then Bo,B2, B4, B5, B6 are ON. 3. When D₁=1 then B4,B,,B6,B7 are ON. 4. When D₁-0 then Bo,B1,B2,B3 are ON.arrow_forwardUse the ramp generator circuit in Fig. B2a to generate the waveform shown in Fig. B2b. Write four equations relating resistors R1, R2, R3, capacitor C and voltages Vs, VR and VA.to the waveform parameters T₁, T, Vcm and Vm- If R = R2 = R3, R₁ = 2R, C = 1 nF, Vcm = 2 V and Vm = 1 V, T₁ = 2 μs and T = 10 μs solve for the values of R, Vs, VR and VA using your equations from part a(i). VR C +VA R3 V₂ Vo мат R1 VsO+ V₁ R₂ Figure B2a Vout Vcm+Vm Vcm Vcm-Vm 0 T₁ T 2T time Figure B2barrow_forward
- The circuit in Figure B1a is a common analogue circuit block. Explain why you would need such a circuit. Draw another circuit in which you use the current flowing in this loop to bias a common source amplifier. This circuit is not ideal for standard CMOS technologies due to threshold shift. Why? Draw an improved version of this circuit to make it better. VDD (W)P MA M3. (), REF (쁜)~ M₁ M2 lout 시~ Rsarrow_forward23bcarrow_forwardDraw the small-signal equivalent circuit of a single transistor amplifier given in figure B1b. Assume the current source to be ideal. Determine the Open-loop transfer function, pole frequency and gain-bandwidth product all in terms of transistor parameters 9m, To and CL. If the load capacitance is 1pF and the necessary unity gain frequency is 600MHz, find the gm for this transistor. V₁ V₁ CLarrow_forward
- Introductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSONDelmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningProgrammable Logic ControllersElectrical EngineeringISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
- Fundamentals of Electric CircuitsElectrical EngineeringISBN:9780078028229Author:Charles K Alexander, Matthew SadikuPublisher:McGraw-Hill EducationElectric Circuits. (11th Edition)Electrical EngineeringISBN:9780134746968Author:James W. Nilsson, Susan RiedelPublisher:PEARSONEngineering ElectromagneticsElectrical EngineeringISBN:9780078028151Author:Hayt, William H. (william Hart), Jr, BUCK, John A.Publisher:Mcgraw-hill Education,





