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ELEC324/624 2018 Page 4 i) (2 marks) The open-loop frequency response of the LM748 op-amp is...
Question 6: Sketch open-loop gain versus frequenen graph of a compensated op amp inci for high-frequency...
Question 6: Sketch open-loop gain versus frequenen graph of a compensated op amp inci for high-frequency operation. Label all axes and other details. A measurement of the open-loop gain at very low frequencies shows it to be 109 dB: at 100 kHz this shows it is 31 dB. Estimate the 3-dB frequency, its unity-gain frequency, and its de gain. (20 points) Question 7: For a Silicon diode Vp = 0.66 V and Ip = 1.0 mA. If Vris 25 mV,...
If the open loop gain of an op-amp is very large, does the closed loop gain depend upon the external components or th...
If the open loop gain of an op-amp is very large, does the closed loop gain depend upon the external components or the op-amp? Explain the meaning of open loop and closed loop operation of an op- amp? What is a practical op-amp? Draw its equivalent circuit.
2.152 An op-amp is connected in the inverting config- uration with R2 = 20 ks2 and...
2.152 An op-amp is connected in the inverting config- uration with R2 = 20 ks2 and Ri = 10ks, where R2 is the feedback resistor. The frequency response of the closed-loop amplifier is found to fall off at a frequency of 1.2 MHz (a) What is the op-amp's unity-gain frequency fo? (b) If the open-loop gain is 2 x 10%, what is the open- loop breakpoint frequency fp?
Miller e Frequency response of eireuits and multiple-stage amplifiers (with feedback) (50) 4. (10...
Miller e Frequency response of eireuits and multiple-stage amplifiers (with feedback) (50) 4. (10) In the following amplifier circuit, the voltage source output resistance R,-2 k2, the op- amp can be considered as an ideal one except that it has a finite open-loop gain of 60 dB and an intrinsic input capacitance of Cn 20 pF. It's connected as an inverting amplifier. a) What frequency characteristic does this circuit have (HP or LP)? b) Design Ce so that the circuit...
(b) If the op-amp is realized by the circuit shown in Fig. 4( find the low-frequency gain and estimate the dominant pol...
(b) If the op-amp is realized by the circuit shown in Fig. 4( find the low-frequency gain and estimate the dominant pole pi as a function of the appropriate small-signal parameters and capacitor values. The unity-gain buffer has very high input resistance and very low output resistance. Assume that the voltage gain of the 2nd stage is very large and make any appro priate approximations. Then find the expression for the unity-gain frequency assuming that it is well within the...
JU Oct 2017 5 Minute Test Your Understanding Quiz A compensated Op-Amp has an open-loop gain...
JU Oct 2017 5 Minute Test Your Understanding Quiz A compensated Op-Amp has an open-loop gain of 10' and a dominant pole of 8 Hz. The Op-Amp is used in a closed-loop single stage amplifier which has a low-frequency gain of 50. What is the -3 dB bandwidth of the closed-loop amplifier? Note: I know of at least two ways to solve this problem
Questions 1: (15 marks) An op-amp has the following open-loop transfer function 105 where coi-100rad/s, ω2-103krad's,...
Questions 1: (15 marks) An op-amp has the following open-loop transfer function 105 where coi-100rad/s, ω2-103krad's, and (03-105krad/s. i. If the op-amp is connected in a unity positive feedback configuration. What is the output frequency of the op-amp?
2. The inverting OP-AMP shown in the figure has an open loop gain of 100. The...
2. The inverting OP-AMP shown in the figure has an open loop gain of 100. The closed loop gain VVs is R 10K R 1K GATEpaper.in a.8 b.-9 c.10
please show methods and calculations 1. Using measured open-loop frequency response values as presented in Table...
please show methods and calculations
1. Using measured open-loop frequency response values as presented in Table 1, the plant transfer function in the system of Figure 1 has been estimated as 48 Gp (s)- (S+2)(s +4.8s +16) 3.0 0.4 -j 0.7 o (rad/s) 0.8 5.1 6.7 2 j01.1-j 0.8 - 0.34 +j0 -0.14 +j0.07 Table 1 To improve the accuracy of the frequency response plot, use the transfer function to estimate the open-loop frequency response Gp(G1.6) at the additional frequency...
em Q5. Consider the Nyquist plot of the frequency response of the open-loop syst 10000 Go(s)...
em Q5. Consider the Nyquist plot of the frequency response of the open-loop syst 10000 Go(s) )(s +10) (s+50) which is shown in Figure Q5 below Real Axil 0.5 Figure Q5 (a) Write down the expression of the frequency response for this system, clearly showing the overall gain. why maximum value of an additional gain K for which the closed loop would still be stable? the corresponding point on the plot occurs at 12rad/s, what is the maximum delay xphian...
Question 6: Sketch open-loop gain versus frequenen graph of a compensated op amp inci for high-frequency operation. Label all axes and other details. A measurement of the open-loop gain at very low frequencies shows it to be 109 dB: at 100 kHz this shows it is 31 dB. Estimate the 3-dB frequency, its unity-gain frequency, and its de gain. (20 points) Question 7: For a Silicon diode Vp = 0.66 V and Ip = 1.0 mA. If Vris 25 mV,...
2.152 An op-amp is connected in the inverting config- uration with R2 = 20 ks2 and Ri = 10ks, where R2 is the feedback resistor. The frequency response of the closed-loop amplifier is found to fall off at a frequency of 1.2 MHz (a) What is the op-amp's unity-gain frequency fo? (b) If the open-loop gain is 2 x 10%, what is the open- loop breakpoint frequency fp?
Miller e Frequency response of eireuits and multiple-stage amplifiers (with feedback) (50) 4. (10) In the following amplifier circuit, the voltage source output resistance R,-2 k2, the op- amp can be considered as an ideal one except that it has a finite open-loop gain of 60 dB and an intrinsic input capacitance of Cn 20 pF. It's connected as an inverting amplifier. a) What frequency characteristic does this circuit have (HP or LP)? b) Design Ce so that the circuit...
(b) If the op-amp is realized by the circuit shown in Fig. 4( find the low-frequency gain and estimate the dominant pole pi as a function of the appropriate small-signal parameters and capacitor values. The unity-gain buffer has very high input resistance and very low output resistance. Assume that the voltage gain of the 2nd stage is very large and make any appro priate approximations. Then find the expression for the unity-gain frequency assuming that it is well within the...
JU Oct 2017 5 Minute Test Your Understanding Quiz A compensated Op-Amp has an open-loop gain of 10' and a dominant pole of 8 Hz. The Op-Amp is used in a closed-loop single stage amplifier which has a low-frequency gain of 50. What is the -3 dB bandwidth of the closed-loop amplifier? Note: I know of at least two ways to solve this problem
Questions 1: (15 marks) An op-amp has the following open-loop transfer function 105 where coi-100rad/s, ω2-103krad's, and (03-105krad/s. i. If the op-amp is connected in a unity positive feedback configuration. What is the output frequency of the op-amp?
2. The inverting OP-AMP shown in the figure has an open loop gain of 100. The closed loop gain VVs is R 10K R 1K GATEpaper.in a.8 b.-9 c.10
please show methods and calculations
1. Using measured open-loop frequency response values as presented in Table 1, the plant transfer function in the system of Figure 1 has been estimated as 48 Gp (s)- (S+2)(s +4.8s +16) 3.0 0.4 -j 0.7 o (rad/s) 0.8 5.1 6.7 2 j01.1-j 0.8 - 0.34 +j0 -0.14 +j0.07 Table 1 To improve the accuracy of the frequency response plot, use the transfer function to estimate the open-loop frequency response Gp(G1.6) at the additional frequency...
em Q5. Consider the Nyquist plot of the frequency response of the open-loop syst 10000 Go(s) )(s +10) (s+50) which is shown in Figure Q5 below Real Axil 0.5 Figure Q5 (a) Write down the expression of the frequency response for this system, clearly showing the overall gain. why maximum value of an additional gain K for which the closed loop would still be stable? the corresponding point on the plot occurs at 12rad/s, what is the maximum delay xphian...
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