
(a)
The quiescent collector currents and the dc voltage at the output.
(a)

Answer to Problem 12.36P
The value of
Explanation of Solution
Given:
The give circuit is shown in Figure 1
Calculation:
The value of the collector current of the first transistor is calculated as,
The value of the collector current of the second transistor is calculated as,
The value of the collector voltage of the second transistor is given by,
Substitute
The expression for the output voltage is calculated as,
Substitute
The collector current of the third transistor is equal to its emitter current and is given by,
Conclusion:
Therefore, the value of
(b)
The value of the small signal voltage gain.
(b)

Answer to Problem 12.36P
The value of small signal voltage gain is
Explanation of Solution
Given:
The give circuit is shown in Figure 1
Calculation:
The expression to determine the value of the small signal input resistance of the first transistor is given by,
Substitute
The expression to determine the trans-conductance of the first transistor is given by,
Substitute
The expression to determine the value of the small signal input resistance of the second transistor is given by,
Substitute
The expression to determine the trans-conductance of the second transistor is given by,
Substitute
The expression to determine the value of the small signal input resistance of the third transistor is given by,
Substitute
The expression to determine the trans-conductance of the third transistor is given by,
Substitute
Mark the values and draw the small signal equivalent circuit.
The required diagram is shown in Figure 2
Apply KCL at the node 1
The expression to determine the input voltage is given by,
Substitute
Substitute
Substitute
Apply KCL at the node 2
Substitute
The expression to determine the value of
Apply KCL at the node 3
Substitute
Substitute
Apply KCL at the node 4
Substitute
Substitute
Substitute
The expression for the small signal voltage gain is given by,
Substitute
Conclusion:
Therefore, the value of small signal voltage gain is
Want to see more full solutions like this?
Chapter 12 Solutions
Microelectronics: Circuit Analysis and Design
- Many machines, such as lathes, milling machines, and grinders, are equipped with tracers to reproduce the contours of templates. The figure is a schematic diagram of a hydraulic tracer in which the tool duplicates the shape of the template on the workpiece. a) Explain how the system works. b) Draw a block diagram and identify the system's elements. c) Classify the control system. Oil under pressure Template Style Tool Piece of workarrow_forward2. Refrigerators to maintain the product at a given temperature have a control system. a) Explain how the control system is or how you think it should be (Make a diagram). b) Make the typical block diagram of a control system and identify the components in the refrigerator system. c) Classify the control system.arrow_forward3. Internal combustion engines require a cooling system to function properly, which maintains the engine temperature at an appropriate value. Neither too high nor too low. There are several systems to control this temperature, the two best known are: • The classic one that uses a thermostat that regulates the flow of coolant (water), and where the fan is mechanically coupled to the engine. • In more recent vehicles, in addition to the thermostat, a temperature controller is used that turns an electric fan on and off. Select one of the two systems mentioned above and: a) Explain how it works, using diagrams. b) Make the typical block diagram of a feedback control system, identifying the components of the system. c) Classify the control system.arrow_forward
- A 3-phase, star connected, 10 kVA, 380 V, salient pole alternator with direct and quadrature axis reactances of 15 and 8 0/ph respectively, delivers full-load current at 0.8 power factor lagging. Neglect the armature resistance. Determine the following: (a) The load angle, (b) The direct axis and quadrature axis components of armature current, (c) E.M.F induced voltage of the alternator, (d) The voltage regulation, and (e) The developed power by the alternator?arrow_forwardA 2000 kVA,Y- connected alternator gives an open circuit line voltage of 3.3 kV for a field current of 65 A. For same field current the short circuit current is being equal to full load current. Calculate the full load voltage regulation at both 0.8 lagging p.f. and unity p.f., neglect armature resistance?arrow_forwardDon't use ai to answer I will report you answerarrow_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,





