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 the amplifier?
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Sketch the Bode plots for a stable three-pole amplifier with dc gain 10^5 whose poles have magnit...
A DC amplifier having a single-pole response with pole frequency 39 Hz and unity-gain frequency of...
A DC amplifier having a single-pole response with pole frequency 39 Hz and unity-gain frequency of 3.25 MHz is operated in a loop whose frequency-independent feedback factor is 0.04. 1) Low Frequency Gain? 2) 3-dB Frequency? 3) Unity-gain frequency of closed-loop amplifier?
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 feedack amplifier with a loop gain func with a loop gain function 5432 T(ir)- 3x10 4x10 If -38.66x10 determine the phase margin and the gairn margin of this system (if it is stable)
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 margin and the gairn margin of...
2. (25pts) An integrated CMOS digital circuit can be represented by the Bode plots shown below....
2. (25pts) An integrated CMOS digital circuit can be represented by the Bode plots shown below. Assume that the closed-loop system is stable under unity feedback configuration. 1kHz 10kHz 100kHz 10MHz degree o -30 -60 1kHz 10kHz 100kHz 10MHz (a) Find the gain and phase margin of the circuit. would need to reduce the system gain in dB to obtain a phase margin (b) Estimate how much we would need to reduce the system of 60°
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).
2.103 An inverting amplifier with nominal gain of-50 VIV employs an op amp having a dc...
2.103 An inverting amplifier with nominal gain of-50 VIV employs an op amp having a dc gain of 10 and a unity-gain frequency of 10 Hz. What is the 3-dB frequency fd of the closed-loop amplifier? What is its gain at 0.1 fsd andat 10fsdB?
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...
For the following closed-loop transfer functions, sketch the bode plots (magnitude and phase), id...
For the following closed-loop transfer functions, sketch the bode plots (magnitude and phase), iden- tifying the zero gain, the slopes (in Decibels) and the high-frequency cutt-off rate. Then verify with Matlab C()101 100) s 0.1) (s 10) 100 s(s +10)2 G(s) = (56) G(s) = s+10(s+100)
For the following closed-loop transfer functions, sketch the bode plots (magnitude and phase), iden- tifying the zero gain, the slopes (in Decibels) and the high-frequency cutt-off rate. Then verify with Matlab C()101 100) s...
Determine DC gain and crossover frequency from the following Bode plots. Magnitude (dB) Phase (deg) -180...
Determine DC gain and crossover frequency from the following Bode plots. Magnitude (dB) Phase (deg) -180 10-1 100 103 10 Frequency (rad/s) DC gain = 10.8, cr = 1.2 rad/s DC gain = 2.5, wc = 4.2 rad/s DC gain = 5.0 dB, -2.5 rad/s • DC gain = 1.8 dB, -2.1 rad/
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
3. Construct the bode plot on a semilog Graph-paper for a unity feedback system whose open...
Construct the bode plot on a semilog Graph-paper for a unity feedback system whose open looptransfer function is given by \(G(S)=\frac{100}{S(S+1)(2+S)} .\) From the bode plot determinea) Gain and phase crossover frequencies.b) Gain and Phase margin, andc) Stability of the closed loop system
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 margin and the gairn margin of this system (if it is stable)
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 margin and the gairn margin of...
2. (25pts) An integrated CMOS digital circuit can be represented by the Bode plots shown below. Assume that the closed-loop system is stable under unity feedback configuration. 1kHz 10kHz 100kHz 10MHz degree o -30 -60 1kHz 10kHz 100kHz 10MHz (a) Find the gain and phase margin of the circuit. would need to reduce the system gain in dB to obtain a phase margin (b) Estimate how much we would need to reduce the system of 60°
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).
2.103 An inverting amplifier with nominal gain of-50 VIV employs an op amp having a dc gain of 10 and a unity-gain frequency of 10 Hz. What is the 3-dB frequency fd of the closed-loop amplifier? What is its gain at 0.1 fsd andat 10fsdB?
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...
For the following closed-loop transfer functions, sketch the bode plots (magnitude and phase), iden- tifying the zero gain, the slopes (in Decibels) and the high-frequency cutt-off rate. Then verify with Matlab C()101 100) s 0.1) (s 10) 100 s(s +10)2 G(s) = (56) G(s) = s+10(s+100)
For the following closed-loop transfer functions, sketch the bode plots (magnitude and phase), iden- tifying the zero gain, the slopes (in Decibels) and the high-frequency cutt-off rate. Then verify with Matlab C()101 100) s...
Determine DC gain and crossover frequency from the following Bode plots. Magnitude (dB) Phase (deg) -180 10-1 100 103 10 Frequency (rad/s) DC gain = 10.8, cr = 1.2 rad/s DC gain = 2.5, wc = 4.2 rad/s DC gain = 5.0 dB, -2.5 rad/s • DC gain = 1.8 dB, -2.1 rad/
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
Construct the bode plot on a semilog Graph-paper for a unity feedback system whose open looptransfer function is given by \(G(S)=\frac{100}{S(S+1)(2+S)} .\) From the bode plot determinea) Gain and phase crossover frequencies.b) Gain and Phase margin, andc) Stability of the closed loop system
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