Given R₂ = 5 kn, what value of R₁ (in k) will result in a closed-loop gain of G 200 ΚΩ Vin R₁ R₂ www + 100 ΚΩ 50 ΚΩ + - Vout Vin + = 3.1. Vout
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- - V2 15Vdo 3 U1A R1 2 1k V- LM324 1k V3 15Vde | VOFF = 0 VAMPL = 1 FREQ = 2k AC = 0 0. R2 Figure 4. Operational amplifier circuit. What frequency does the output voltage (across R3) have? What is the amplitude of the output voltage? From the output waveform and the input waveform, determine the gain of the op-amp circuit. Does this match with what you predicted? How could you change this circuit so that the output voltage would be nearly the same as the input voltage? What purpose would that serve? Can you modify the existing circuit and verify this experimentally? What is the phase difference between the output and input voltage? Derive the transfer function for the output-input relationship for the operational amplifier. How would the gain and the output change if a capacitor were in the feedback path instead of a resistor? (Examine the circuit using phasors and impedance and circuit analysis techniques). -w-Vi is a sinusoid signal of 8 Vp-p and f = 1 kHz. Vref = 2 V and V1 = 5 V and V2 = -1V. Assume that V1 is connected to pin7 of op-amp 741 and V2 is connected to pin 4. The output Vo will be, * V1 Vo 741 Vret O A square wave of 6 Vp-p, 1 kHz A rectangular wave of 6 Vp-p, 1 kHz A triangular wave of 6 Vp-p, 1 kHz A sinusoid wave of 8 Vp-p, 1 kHz A rectangular wave of 4 Vp-p, 1 kHz A square wave of 8 Vp-p, 1 kHz A sawtooth wave of 6 Vp-p, 1 kHz O A sinusoid wave of 6 Vp-p, 1 kHzH: Design OP-Amp eircwt that Poduce an out Put an given by Uo = - ( 4 V,t Uz to.l U3) If u, = 2 sinwt = 5 V and U3 = - 100V sketch the ont Put vo ltage waveform ?
- Problem J The circuit shown must provide operation for frequencies up to 20 kHz with no more than 1.2db of loss. The peak sinusoidal input signal is expected never to exceed 0.4 V. Determine the minimum values of a) unity-gain frequency and b) slew rate for the op amp selected. -3db -1.2db I I 20kHz I BCL Vsig Rin W Rf ww Rin 10k Rf 65k Vout OThe voltage signals VA and VB from two sensors need to be conditioned to obtain an output voltage Vout= A(VA - VB), where A is an amplification terms that can be adjusted between 0 and 100 using a potentiometer. c) The obtained signal needs to be filtered to attenuate high frequency noise. Which of the following circuits using ideal op-amps is the most appropriate for this function and why? Input C R CIRCUIT 1 Output Input R CIRCUIT 2 Output Input m R R CIRCUIT 3 OutputCircuits are shown to the right a. Is this an example of positive feedback or negative feedback? b. If the circuit is an amplifier, what is the gain and is it inverting or noninverting? If the circuit is a comparator calculate the threshold voltage. ANSWER EVERYTHING FOR UPVOTE THANK YOU R2 5 ΚΩ mm 1 R1 3 ΚΩ OA V_in sine 1 kHz +12V -12V R2 1 ΚΩ mm V out + 3 5 ΚΩ ww OA + R1 V_in sine 1 kHz +12V -12V R2 1 ΚΩ m V_out 2 R1 5 ΚΩ mm + OA V_in sine 1 kHz +12V -12V V_out
- Q\ Solve the following questions while giving the reason for each point 25. Each RC circuit in an op-amp (a) causes the gain to roll off at -6 dB/octave (b) causes the gain to roll off at-20 dB/decade (c) reduces the midrange gain by 3 dB (d) answers (a) and (b) 26. If a certain op-amp has a midrange open-loop gain of 200,000 and a unity-gain frequency of 5 MHz, the gain-bandwidth product is (a) 200,000 Hz (b) 5,000,000 Hz. (c) 1 x 1012 Hz (d) not determinable from the information 27. The bandwidth of an ac amplifier having a lower critical frequency of 1 kHz and an upper critical frequency of 10 kHz is (a) 1 kHz (b) 9 kHz (c) 10 kHz (d) 11 kHz 28. The bandwidth of a de amplifier having an upper critical frequency of 100 kHz is (a) 100 kHz (b) unknown (c) infinity (d) 0 kHz 29. When negative feedback is used, the gain-bandwidth product of an op-amp (a) increases (b) decreases (c) stays the same (d) fluctuates 30. If a certain op-amp has a closed-loop gain of 20 and an upper critical…9. The transfer function of an inverting amplifier with a short circuit feedback is -1 b- -Rin Rin Where Rin is the input resistance of the op- amp. a- c- zero 10. State space model of a dynamic system is consider a a- comprehensive model b- reliable model c- simple model d- non of them b- three d- -1 11. A system with two resistors, one capcitor and two inductors its number of states is a- two d- five c- fourAnswer the following Draw, Illustrate and label your schematic diagram before solving the problem. 2.) If C1 = C2 = 70 nF, determine the output frequencies produced by this arrangement: a) when R1 = R2 = 1.2k ohms and b) when R1 = R2 = 4k ohms These might help as a guide to answer the question..
- For the following amplifier small signal equivalent circuit, Ro is Rsi O b. ww Select one: O a. infinity ro R₁ R₂ Vgs +8mVgs www O c. none of the answers O d. RD D R₂ Rp VdsExample 07:- For the circuit shown in the figure, calculate the output voltage when 1- R1 = R2 = R3 = R4 = 100 2- R1 = R2 = R3 = 1002 and R4 = 1200 Consider the circuit use an ideal Op-Amp and its resistances do not load the bridge circuit. RA www 12K 10K 10V ww R3 B 122 10K 12KGiven the four statements, which of the following statements are true about an op-amp integrator? i. For an op-amp integrator wilh R = 10OKOhms, C = 10UF and a sine wave inpul waveform, the output waveform is a cosine waveform. %3D ii. For an op-amp integrator with R = 100KOhms, C = 10uF and a triangular input waveform, the output waveform is a square wave. iii. For an op-amp integrator with R- 100KOhms, C =10uF and a sine wave input waveform, the output waveform is a sawtooth waveform. v. For an op-amp integrator with R10OKOhms. C lCuF and a square wave input waveform, the output waveform is a triangular waveferm.