Homework Answers
from the plot
gain margin=1.0968
phase margin=1.3944
gain cross over frequency=7.122*10^5
phase cross over frequency=6.8013*10^5
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Question 2 (10 marks) Consider the following three-pole feedback amplifier feedack amplifier with a loop gain func with a loop gain function 5432 T(ir)- 3x10 4x10 If -38.66x10 determine the phase...
Question 2 (10 marks) Consider the following three-pole feedback amplifier with a loop gain function: 5432xB Tlir)- 2x101+ 4 x 105 If -38.66x10" determine the phase margin and the gain margin...
Question 2 (10 marks) Consider the following three-pole feedback amplifier with a loop gain function: 5432xB Tlir)- 2x101+ 4 x 105 If -38.66x10" determine the phase margin and the gain margin of this system (if it is stable).
Question 2 (10 marks) Consider the following three-pole feedback amplifier with a loop gain function: 5432xB Tlir)- 2x101+ 4 x 105 If -38.66x10" determine the phase margin and the gain margin of this system (if it is stable).
Question1 Figure 1 represents a shunt-shunt feedback amplifier circuit. The resistors' values and the transistors parameters are also indicated in Figure 1 Voo 8100 Rci 28 KS2 Rci D10 | R.-S...
Question1 Figure 1 represents a shunt-shunt feedback amplifier circuit. The resistors' values and the transistors parameters are also indicated in Figure 1 Voo 8100 Rci 28 KS2 Rci D10 | R.-S㏀ Hint: in DC analysis; gl -11.538mA/V and 0 R0.2k2 822.85mA/V IE 0.3mA Figure- 1) For R, -10 k2, determine the small-signal closed-loop current-gain A, 2) Determine the small-signal open-loop current-gain.4,- 3) From the results of 2) and 3), determine the loop-gain T Kint: If you did not solve a),...
Sketch the Bode plots for a stable three-pole amplifier with dc gain 10^5 whose poles have magnit...
Sketch the Bode plots for a stable three-pole amplifier with dc
gain 10^5 whose poles have magnitudes 0.1 MHz, 1 MHz and 10 MHz.
Find the gain margin and phase margin of the amplifier if it is
connected in a feedback loop with (a) unity feedback factor; (b)
feedback factor 5.623 x 10^-5; (c) closed-loop dc gain 50 dB. In
each case indicate whether the closed-loop amplifier is stable or
unstable. What is the minimum stable closed-loop dc gain of...
Solve Question 2 The open loop gain of an amplifier is given by 105 Av = 10 105 If the closed loop gain is 100: 1. Show that this amplifier will be stable 2. Calculate the phase margin Questi...
Solve
Question 2 The open loop gain of an amplifier is given by 105 Av = 10 105 If the closed loop gain is 100: 1. Show that this amplifier will be stable 2. Calculate the phase margin
Question 2 The open loop gain of an amplifier is given by 105 Av = 10 105 If the closed loop gain is 100: 1. Show that this amplifier will be stable 2. Calculate the phase margin
1:43 You All Media 27/04/2020, 1:41 PM Consider the following three pole feedback amplifier with a...
1:43 You All Media 27/04/2020, 1:41 PM Consider the following three pole feedback amplifier with a loc faction 200 TO) 1+2x10 +x10 13x109) Determine the phase margin of this system. Is it stable TOSHIBA
A unity gain negative feedback system has an open-loop transfer function given by 4. s) =...
A unity gain negative feedback system has an open-loop transfer function given by 4. s) = s(1 + 10s)(1 + 10s)? Draw a Bode diagram for this system and determine the loop gain K required for a phase margin of 20 deg. What is the gain margin? 5. We are given the closed-loop transfer function 10(s + 1) T(s) = 82+98+10 for a "unity feedback" system and asked to find the open-loop transfer function, generate a log-magnitude-phase plot for both...
An amplifier is characterised by a 3 pole transfer function of the form where Ao - 100,000, f1( 1...
An amplifier is characterised by a 3 pole transfer function of the form where Ao - 100,000, f1( 1/2) 1e4 Hz, f2 1e6 Hz, f3 -100e6 Hz By drawing a Bode plot for the amplifier loop gain (or otherwise), determine the phase margin for the amplifier when used with a feedback factor, B-0.5
An amplifier is characterised by a 3 pole transfer function of the form where Ao - 100,000, f1( 1/2) 1e4 Hz, f2 1e6 Hz, f3 -100e6 Hz...
A unity feedback system has the following open-loop gain function 10 s(s+2) Use MATLAB to plot...
A unity feedback system has the following open-loop gain function 10 s(s+2) Use MATLAB to plot the Bode plot of this system Find the gain and phase margin. Identify these margins on the Bode plot. Is the G(s) a. b. system stable?
6) Consider the feedback system in Figure 1 with the loop transfer function a) [8 Marks]...
6) Consider the feedback system in Figure 1 with the loop transfer function a) [8 Marks] Plot the Bode diagram for this loop transfer function b) 10 Marks] Determine the frequency at which the gain has unit magnitude and compute the phase angle at that frequency. Controller Process G(s)Y(s) Figure 1
QUESTION a) With appropriate diagram explain the following compensator arrangements i. Cascade ii. Minor Loop Feedback...
QUESTION a) With appropriate diagram explain the following compensator arrangements i. Cascade ii. Minor Loop Feedback iii. Output Feedback (6 marks) b) Design a suitable lead compensator for a system with unity feedback and having open loop transfer function: Gis) = $(5+10) Determine the gain k meet the following specifications: Damping ratio { = 0.5 b. Undamped natural frequency w Hence determine the settling time, peak overshoot and peak time for a unit step input (10 marks). c) Sketch the...
Question 2 (10 marks) Consider the following three-pole feedback amplifier with a loop gain function: 5432xB Tlir)- 2x101+ 4 x 105 If -38.66x10" determine the phase margin and the gain margin of this system (if it is stable).
Question 2 (10 marks) Consider the following three-pole feedback amplifier with a loop gain function: 5432xB Tlir)- 2x101+ 4 x 105 If -38.66x10" determine the phase margin and the gain margin of this system (if it is stable).
Question1 Figure 1 represents a shunt-shunt feedback amplifier circuit. The resistors' values and the transistors parameters are also indicated in Figure 1 Voo 8100 Rci 28 KS2 Rci D10 | R.-S㏀ Hint: in DC analysis; gl -11.538mA/V and 0 R0.2k2 822.85mA/V IE 0.3mA Figure- 1) For R, -10 k2, determine the small-signal closed-loop current-gain A, 2) Determine the small-signal open-loop current-gain.4,- 3) From the results of 2) and 3), determine the loop-gain T Kint: If you did not solve a),...
Sketch the Bode plots for a stable three-pole amplifier with dc
gain 10^5 whose poles have magnitudes 0.1 MHz, 1 MHz and 10 MHz.
Find the gain margin and phase margin of the amplifier if it is
connected in a feedback loop with (a) unity feedback factor; (b)
feedback factor 5.623 x 10^-5; (c) closed-loop dc gain 50 dB. In
each case indicate whether the closed-loop amplifier is stable or
unstable. What is the minimum stable closed-loop dc gain of...
Solve
Question 2 The open loop gain of an amplifier is given by 105 Av = 10 105 If the closed loop gain is 100: 1. Show that this amplifier will be stable 2. Calculate the phase margin
Question 2 The open loop gain of an amplifier is given by 105 Av = 10 105 If the closed loop gain is 100: 1. Show that this amplifier will be stable 2. Calculate the phase margin
1:43 You All Media 27/04/2020, 1:41 PM Consider the following three pole feedback amplifier with a loc faction 200 TO) 1+2x10 +x10 13x109) Determine the phase margin of this system. Is it stable TOSHIBA
A unity gain negative feedback system has an open-loop transfer function given by 4. s) = s(1 + 10s)(1 + 10s)? Draw a Bode diagram for this system and determine the loop gain K required for a phase margin of 20 deg. What is the gain margin? 5. We are given the closed-loop transfer function 10(s + 1) T(s) = 82+98+10 for a "unity feedback" system and asked to find the open-loop transfer function, generate a log-magnitude-phase plot for both...
An amplifier is characterised by a 3 pole transfer function of the form where Ao - 100,000, f1( 1/2) 1e4 Hz, f2 1e6 Hz, f3 -100e6 Hz By drawing a Bode plot for the amplifier loop gain (or otherwise), determine the phase margin for the amplifier when used with a feedback factor, B-0.5
An amplifier is characterised by a 3 pole transfer function of the form where Ao - 100,000, f1( 1/2) 1e4 Hz, f2 1e6 Hz, f3 -100e6 Hz...
A unity feedback system has the following open-loop gain function 10 s(s+2) Use MATLAB to plot the Bode plot of this system Find the gain and phase margin. Identify these margins on the Bode plot. Is the G(s) a. b. system stable?
6) Consider the feedback system in Figure 1 with the loop transfer function a) [8 Marks] Plot the Bode diagram for this loop transfer function b) 10 Marks] Determine the frequency at which the gain has unit magnitude and compute the phase angle at that frequency. Controller Process G(s)Y(s) Figure 1
QUESTION a) With appropriate diagram explain the following compensator arrangements i. Cascade ii. Minor Loop Feedback iii. Output Feedback (6 marks) b) Design a suitable lead compensator for a system with unity feedback and having open loop transfer function: Gis) = $(5+10) Determine the gain k meet the following specifications: Damping ratio { = 0.5 b. Undamped natural frequency w Hence determine the settling time, peak overshoot and peak time for a unit step input (10 marks). c) Sketch the...
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