Circuit Analysis
negative feedback network (b) Figure Q3(b) shows an amplifier with a Given Zof 100 kQ, Zo = 10 kQ and A 50 State the feedback topology and the amplifier type (i) (2 marks) (ii) Calculate the gain without feedback, A and the feedback factor, B. (6 marks) (iii) If the low cutoff frequency of the amplifier with feedback network (fL) is 300 Hz, calculate the low cutoff frequency (fi) if the amplifier does not have the feedback network. (2 marks) (iv) Sketch and label the values of the frequency response for both conditions, with and without feedback (3 marks)
Homework Answers
(I) Feedback topology is voltage series and the amplifier is
Voltage amplifier.
In
the next figure shown all the values are according to the given
data. The factor 10 shown in the graph is the sensitivity factor of
the feedback amplifier calculated in the above parts
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Circuit Analysis
Zo Is Zi ALi If FIGURE Q3(b) negative feedback network (b) Figure Q3(b) shows...
Circuit Analysis The circuit shown in Figure Q3 is a block diagram of an amplifier with...
Circuit Analysis
The circuit shown in Figure Q3 is a block diagram of an amplifier with a negative feedback. Given that Is 100 uA, IF 99 HA and Vo = 5V. For Figure Q3: (a) Determine the gain without feedback (Ax), gain with feedback (AF) and feedback factor (B), including the units Name the amplifier and feedback topology used. (b) + Zo RL Zi Vo AxIi ZAF ZoF
The circuit shown in Figure Q3 is a block diagram of an...
Circuit Analysis For the circuit shown in Figure Q2: (a) (b) Determine the amplifier type and...
Circuit Analysis
For the circuit shown in Figure Q2: (a) (b) Determine the amplifier type and feedback topology Derive the input impedance with feedback, Zif and state whether it is increased or decreased from the circuit without feedback. If Ar 10, Zi 500k2, Zo = 2kQ, and Zof- 25k2, calculate Zi, Ax and B. (c) I IG Vo V Ax V Zd Zof Figure Q2
For the circuit shown in Figure Q2: (a) (b) Determine the amplifier type and feedback...
Q3(a) Explain TWO (2) differences between system with positive feedback and system with negative feedback. (b)...
Q3(a) Explain TWO (2) differences between system with positive feedback and system with negative feedback. (b) With the aid of a block diagram, derive the closed-loop gain, Af of a negative feedback system. (c) An amplifier with a negative feedback has a midband gain of 47.96 dB and low cutoff frequency of 75 Hz. The feedback network of the system has a feedback factor (B) of 0.0022. (1) Determine the midband gain and the low cutoff frequency if the amplifier...
Circuit Analysis R Rs Io. + Vs Vo Figure Q3(a) Ru WHI (a) Figure Q3(a) shows...
Circuit Analysis
R Rs Io. + Vs Vo Figure Q3(a) Ru WHI (a) Figure Q3(a) shows an Op-Amp amplifier circuit which employs a negative feedback (i) circuit Classify the feedback topology used and the type of amplifier in the (4 marks) (ii) Formulate the feedback network (B) and the overall gain of the amplifier with feedback (AF). (10 marks)
R Rs Io. + Vs Vo Figure Q3(a) Ru WHI
(a) Figure Q3(a) shows an Op-Amp amplifier circuit which employs a...
QUESTION 1 +20 V a. Determine the mathematical expression for Av. b. Calculate Zi, Zo and Av for the given network. p-4...
QUESTION 1 +20 V a. Determine the mathematical expression for Av. b. Calculate Zi, Zo and Av for the given network. p-4.5 V i 10ΜΩ QUESTION 3 a. Design a voltage-divider amplifier such that AvNL > 350, Zo 7 kQ, Zin> 1 k2. Use a silicon transistor with r0-80 kQ, β-120 and a power supply of 20 V. b. Draw the diagram of the circuit you have designed.
QUESTION 1 +20 V a. Determine the mathematical expression for Av. b....
Figure Q3 (b) shows the circuit of an active filter. (1) Identify the type of filter...
Figure Q3 (b) shows the circuit of an active filter. (1) Identify the type of filter (1) Calculate the high cut-off frequency low cutoff frequency. (ii) Band width. (2 marks) (4 marks) (1 marks) 4.7k92 4.7k92 18k2 W 18692 0.05F Vio 1062 0.02 LF Figure Q3 (b)
(b) The unity feedback system is given as in Figure Q3 (b). (i) Determine the closed...
(b) The unity feedback system is given as in Figure Q3 (b). (i) Determine the closed loop transfer function of the system. (2 marks) 2 CONFIDENTIAL CONFIDENTIAL BEJ 20503/BEH 30603/BEF33003 (ii) Calculate the damping ratio š, peak time Tp, rise time Tr, percentage of overshoot%\ls and settling time Ts (5% criterion) of the system. (11 marks) Investigate the characteristic of the system response. (1 marks) (iii) R(s)+ E(s) C(s) 25 s(s + 6) Figure Q3(b)
Please solve all parts pf the questions. Please show clear and neat work. Thank you! FEEDBACK AMPLIFIER ANALYSIS β,s/ Sa) Identify the feedback topology being used. Draw the B-network and You must j...
Please solve all parts pf the questions. Please show clear and
neat work. Thank you!
FEEDBACK AMPLIFIER ANALYSIS β,s/ Sa) Identify the feedback topology being used. Draw the B-network and You must justify or explain find the numerical value for B- your answer for full credit (20 pts) 2 Assume matching transistors with DC bias voltage (or an ac ground) Sb) Draw and fully label the A-circuit (includes loading effects, R & R but NO feedback) p) Sc) Calculate the...
b) A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal...
b) A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the network are of 1 +j0 p.u. and the impedance of the electric arc is neglected (Zf-0+)0p.u). The positive, negative and zero sequence impedance parameters of the generator, transmission lines and transformer are given in Figure Q3 x,(1) 30. 15 p.u. 1岚12,-j0.15 p.u. 2 T2)0.15 Figure Q3. Circuit for problem 3b) (i) Assuming a balanced excitation, draw the positive, negative and zero...
Q3. Consider the feedback system in Figure 3. In the case when 2L G(s) Figure 3:...
Q3. Consider the feedback system in Figure 3. In the case when 2L G(s) Figure 3: Block diagranm G(s) and when k is positive: (a) Sketch the root locus of the closed loop system (10) To assist in this (to indicate on root locus diagram) ) Compute the open loop poles and zeros (i) ealeulate the portion of the locus lying on the real axis; (iii) calculate the angles of asymptotes make with the real axis arad also the value...
Circuit Analysis
The circuit shown in Figure Q3 is a block diagram of an amplifier with a negative feedback. Given that Is 100 uA, IF 99 HA and Vo = 5V. For Figure Q3: (a) Determine the gain without feedback (Ax), gain with feedback (AF) and feedback factor (B), including the units Name the amplifier and feedback topology used. (b) + Zo RL Zi Vo AxIi ZAF ZoF
The circuit shown in Figure Q3 is a block diagram of an...
Circuit Analysis
For the circuit shown in Figure Q2: (a) (b) Determine the amplifier type and feedback topology Derive the input impedance with feedback, Zif and state whether it is increased or decreased from the circuit without feedback. If Ar 10, Zi 500k2, Zo = 2kQ, and Zof- 25k2, calculate Zi, Ax and B. (c) I IG Vo V Ax V Zd Zof Figure Q2
For the circuit shown in Figure Q2: (a) (b) Determine the amplifier type and feedback...
Q3(a) Explain TWO (2) differences between system with positive feedback and system with negative feedback. (b) With the aid of a block diagram, derive the closed-loop gain, Af of a negative feedback system. (c) An amplifier with a negative feedback has a midband gain of 47.96 dB and low cutoff frequency of 75 Hz. The feedback network of the system has a feedback factor (B) of 0.0022. (1) Determine the midband gain and the low cutoff frequency if the amplifier...
Circuit Analysis
R Rs Io. + Vs Vo Figure Q3(a) Ru WHI (a) Figure Q3(a) shows an Op-Amp amplifier circuit which employs a negative feedback (i) circuit Classify the feedback topology used and the type of amplifier in the (4 marks) (ii) Formulate the feedback network (B) and the overall gain of the amplifier with feedback (AF). (10 marks)
R Rs Io. + Vs Vo Figure Q3(a) Ru WHI
(a) Figure Q3(a) shows an Op-Amp amplifier circuit which employs a...
QUESTION 1 +20 V a. Determine the mathematical expression for Av. b. Calculate Zi, Zo and Av for the given network. p-4.5 V i 10ΜΩ QUESTION 3 a. Design a voltage-divider amplifier such that AvNL > 350, Zo 7 kQ, Zin> 1 k2. Use a silicon transistor with r0-80 kQ, β-120 and a power supply of 20 V. b. Draw the diagram of the circuit you have designed.
QUESTION 1 +20 V a. Determine the mathematical expression for Av. b....
Figure Q3 (b) shows the circuit of an active filter. (1) Identify the type of filter (1) Calculate the high cut-off frequency low cutoff frequency. (ii) Band width. (2 marks) (4 marks) (1 marks) 4.7k92 4.7k92 18k2 W 18692 0.05F Vio 1062 0.02 LF Figure Q3 (b)
(b) The unity feedback system is given as in Figure Q3 (b). (i) Determine the closed loop transfer function of the system. (2 marks) 2 CONFIDENTIAL CONFIDENTIAL BEJ 20503/BEH 30603/BEF33003 (ii) Calculate the damping ratio š, peak time Tp, rise time Tr, percentage of overshoot%\ls and settling time Ts (5% criterion) of the system. (11 marks) Investigate the characteristic of the system response. (1 marks) (iii) R(s)+ E(s) C(s) 25 s(s + 6) Figure Q3(b)
Please solve all parts pf the questions. Please show clear and
neat work. Thank you!
FEEDBACK AMPLIFIER ANALYSIS β,s/ Sa) Identify the feedback topology being used. Draw the B-network and You must justify or explain find the numerical value for B- your answer for full credit (20 pts) 2 Assume matching transistors with DC bias voltage (or an ac ground) Sb) Draw and fully label the A-circuit (includes loading effects, R & R but NO feedback) p) Sc) Calculate the...
b) A fault occurs at bus 4 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the network are of 1 +j0 p.u. and the impedance of the electric arc is neglected (Zf-0+)0p.u). The positive, negative and zero sequence impedance parameters of the generator, transmission lines and transformer are given in Figure Q3 x,(1) 30. 15 p.u. 1岚12,-j0.15 p.u. 2 T2)0.15 Figure Q3. Circuit for problem 3b) (i) Assuming a balanced excitation, draw the positive, negative and zero...
Q3. Consider the feedback system in Figure 3. In the case when 2L G(s) Figure 3: Block diagranm G(s) and when k is positive: (a) Sketch the root locus of the closed loop system (10) To assist in this (to indicate on root locus diagram) ) Compute the open loop poles and zeros (i) ealeulate the portion of the locus lying on the real axis; (iii) calculate the angles of asymptotes make with the real axis arad also the value...
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