The magnitude of the current gain and the relationship between
Answer to Problem 12.8TYU
The relation between the current gain with the change in resistance
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
Calculation:
Mark the nodes and redraw the circuit.
The given diagram is shown in Figure 2
Figure 2
Mark the values and draw the PSpice circuit for the above circuit.
The required circuit is shown in Figure 3
Figure 3
The snip for the drop box of the internal parameters of the transistor is shown in Figure 4
Figure 4
The simulation settings to estimate the magnitude of the current gain as the value of
Figure 5
Then left click on the trace option then select add trace and type “ABS(l(RL)L(li))” then command in the trace magnitude of the current gain as the emitter resistance varies between
Figure 6
By KCL the expression for the current
The expression for the node voltage is given by,
Apply KCL at node
Substitute
The expression for the output current is given by,
Apply KCL at node
Substitute
Substitute
Consider
Thus, the expression for the small signal current gain is,
Conclusion:
Therefore, the relation between the current gain with the change in resistance
Want to see more full solutions like this?
Chapter 12 Solutions
Microelectronics: Circuit Analysis and Design
- Consider a unity negative feedback system with loop transfer function shown in Figure where L(s)=GcG(s)=K(s2+6s+1)(s2+5s+1) Determine the value of K for which the closed-loop system is stable.arrow_forwardAnalyze the circuit shown in Figure Shown.(i) Determine the type of negative feedback used in the circuit by showingthe suitable process. (ii) Derive the equation for the feedback factor and the gain of the circuit. (ii) Calculate the feedback factor and the gain of the circuit if R1 = 1.2 kΩ,R2 = 15 kΩ and RL = 6.8 kΩ.arrow_forwardA unity feedback system with open-loop transfer function given as:?(?) = ??. ?(? + ?)(? + ?)(? + ??)without affecting its operating point (−1.54 ∓ ??2.66) appreciably a- Design a suitable compensator to drive the step response error to zero.b- Design a suitable compensator to reduce step error by factor of 5.arrow_forward
- Find the steady-state error as a function of time for the unity feedback system,..arrow_forward2-) The AC equivalent of a feedback amplifier circuit is given in the figure on the right. (Hfe100, Va = ∞, Ic1 = 15 mA, Ic2 = 5mA and Ic3 = 5 mA) a) State the type of feedback used in the circuit, explaining the reason. b) Draw the small signal equivalent of the amplifier circuit. c) Calculate the value of β for the feedback by drawing the β circuit. d) Find the Avf = Vo / Vs closed loop gain of this circuit. e) Find the Rif and Rof values.arrow_forwardLoop gain analysis in a feedback system applies for __________. Option (1) small-signal perturbations Option (2) large-signal perturbations Option (3) both large and small-signal perturbationsarrow_forward
- The transistor parameters for the circuit shown are VTN = 0.4 V, Kn =0.5 mA/V2, and λ = 0.(a) Discuss the feedback topology, show the input ant output connections (series orshunt)(b) Find the feedback factor β (find the transfer function without feedback first)arrow_forwardA unity feedback system has a loop transfer function Determine the range of K for which the system is stable using the Nyquist plot.arrow_forwardConsider a system with no zeros and only one pole as +5. Place this system in the forward path of a feedback system and add a PD controller in the feedback path with proportional gain 300 and derivative gain 40. Now draw the entire block diagram showing the transfer functions of each block clearly. Then find the closed-loop transfer function of the entire system.arrow_forward
- What is the importance of TRANSFER FUNCTION in Feedback and contol system. Please discuss.arrow_forwardUsing Routh-criterion investigate the stability of a unity feedback control system whose open loop transfer function is given by, G(s) = (e ^ (- s * T))/(s(s + 2))arrow_forwarddescribe the expression of sensitivity of C.L.T.F. wrt. feedback gain.arrow_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,