the open loop gain Ao=99990 of a high gain amplifier varies by 20% design a feedback path with feedback factor K such that the closed loop gain only varies by .02%
the open loop gain Ao=99990 of a high gain amplifier varies by 20% design a feedback...
Q 9. The open-loop gain of an amplifier is A = 65 , and the feedback factor is B = 0.5 . If the open-loop gain A changes by -18% and the feedback factor B changes by +17%, determine the closed-loop gain Af (25 points)
2. A designer is considering two possible designs of a feedback amplifier. The goal is to get a closed- loop gain of A, 20 V/V. One design employs an amplifier for which A- 500 V/V; the other uses an amplifier with the open-loop gain A 250 V/N Find B and the desensitivity factor in both cases. If the A-500 V/V amplifier unit has a gain uncertainty of ±10%, what is the gain uncertainty for the closed-loop amplifiers utilizing this amplifier?...
A negative feedback amplifier has an open loop voltage gain as follows: (1+s/opl)( 1+s/op2) If the feedback factor is β (a) show that the gain with feedback is given by (b) Show the pole locations on the complex plane A negative feedback amplifier has an open loop voltage gain as follows: (1+s/opl)( 1+s/op2) If the feedback factor is β (a) show that the gain with feedback is given by (b) Show the pole locations on the complex plane
You have an otherwise ideal op-amp with an open-loop gain of 20. Design an inverting amplifier with this single op-amp so that it has a DC gain of -5 ±0.1. Also, please explain how this design works in words.
7. For a negative feedback control system with unit feedback gain, its open-loop 100 transfer function is G (s) Design a PID controller, so that the open s(10s) corresponding closed-loop poles are -2+jl and -5. (10 scores) 7. For a negative feedback control system with unit feedback gain, its open-loop 100 transfer function is G (s) Design a PID controller, so that the open s(10s) corresponding closed-loop poles are -2+jl and -5. (10 scores)
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
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...
2. Obtain A (open loop gain), B (arbitrary rate), and Af (closed loop gain) of the transmission feedback amplifier below. (gm1 = gm2 = 5 MAN, RD = 10KOhm, ro2 = 20KOhm, RF = 1000hm, RL=1KOhm), and Ignore ro1 and consider ro2 only when calculating output resistance. Calculate using each transistor's small signal model... SRO (Q2 that SRL Vs RF
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...
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...