To show: The variation in magnitude of the input resistance
To explain: The influence of

Answer to Problem 12.9TYU
The influence of
Explanation of Solution
Given:
The given diagram is shown in Figure 1
Figure 1
Feedback resistor value is varied between
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(V(vi)l(li))” then command in the trace magnitude of the resistance
Figure 6
By KCL the expression for the current
The expression for the node voltage is given by,
Apply KCL at node
Substitute
Consider
The expression for the output current is given by,
Substitute
Substitute
Conclusion:
Therefore, the influence of
Want to see more full solutions like this?
Chapter 12 Solutions
MICROELECT. CIRCUIT ANALYSIS&DESIGN (LL)
- consider the circuit below. Assume it uses ideal diodes with the details specified above. the left side of the circuit is basically a wheatstone bridge, hooked to the right side, which is a differential op amp. a) what is the voltage between junctions "A" and "B" if R2 is 201 ohms? b) what are the minimum and maximum values of R2 can be without the op amp hitting saturation?remember that for the diodes to be ideal you they have to have a turn on voltage of 0.6 volts.arrow_forwardThe capacitors in the circuit shown below have no energy stored in them and then switch “S1” closes at time t=0. Assume the ideal op amp does not saturate. As stated above assume the diodes are ideal with parameters specified above. Diodes are at 0.6 Volts Show the derivations of the mathematical equations for v(t) at Locations A and B for t≥ 0arrow_forwardPhase (deg) Magnitude (dB) -20 -40 -60 -80 -100 ° -90 -180 -270 10-1 (i) ° Problem 5 Consider a unity (negative) feedback system with a proportional controller. The Bode plot of the plant transfer function G(s) is given as below. System: sys Frequency (rad/s): 1 Magnitude (dB): 13.9 System: sys Frequency (rad/s): 14.9 Magnitude (dB): 6.58 System: sys Frequency (rad/s): 1 Phase (deg): -9.76 10° System: sys Frequency (rad/s): 25.6 Magnitude (dB): -0.0703 System: sys Frequency (rad/s): 41.3 Magnitude (dB): -8.06 System: sys Frequency (rad/s): 200 Magnitude (dB): -44.4 System: sys Frequency (rad/s): 14.9 Phase (deg): -110 System: sys Frequency (rad/s): 25.6 Phase (deg): -148 System: sys Frequency (rad/s): 41.3 Phase (deg): -180 System: sys Frequency (rad/s): 200 Phase (deg): -247 101 Frequency (rad/s) 102 Find the gain crossover frequency, phase crossover frequency, gain margin and phase margin of the system. Is the closed-loop system stable? (ii) What is the steady-state error of the…arrow_forward
- Problem 1 Consider the following system. In the figure, y(t) denotes the voltage across the capacitor. u(t) 1+ R W L + 0000 y(t) C Y(s) (i) Find the transfer function H(s): = of the system. U(s) Now suppose, R 10 KQ, L = 0.5 mH and C = 10 μF. (ii) Find the poles and zeros. Is the system BIBO stable? (iii) Compute settling time, rise time, peak time and % overshoot of the step response of the system. What the steady-state output for unit step input?arrow_forwardA 3-phase, 52 H.P, 50 Hz, 6-Pole, Y- connected induction motor runs at a speed of 980 rpm.The motor is supplied from 380 V mains and it takes a rated current of 80 A at 0.8 p.f. If the total stator losses are 1.7 kW, determine: the air-gap power, rotor copper loss, friction and windage losses?arrow_forwardelectric plants do hand writingarrow_forward
- please solve quickly. thank you!arrow_forwardPlease show all stepsarrow_forward12-3) PDF, mean, & variance A random variable has the PDF shown in the figure. a) Find the numerical value of the parameter K. b) Write the numerical expression for the PDF. c) Find the probability that the random variable is negative. d) Find the mean of x, the expected value of x², and the variance of x. K Px(x) 3 Xarrow_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,





