) The circuit of Fig. 6 shows the ideal differential circuit with an ideal operational amplifier. Find the minimum value of the CMRR, where R₁ = 10 K±2%, R₂ = 50 K±2%, R3 = 10 ΚΩ+2%, and R4 = 50 ΚΩ+2% R₁ V₁0 W V₁0 R3 R₂ W W R4 - Vo Figure 6.
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- I. An op amp has a GBP of 10°. A 0.3 µV sinusoidal signal at 5 KHz is required to be amplified to 5 V. Calculate the gains and draw the schematic circuit to achieve this. II. K type thermocouple having a range of 0– 350 °C and a sensitivity of 40 uV/°C. The signal is connected to an instrumentation amplifier before interfacing it with 5V analog to digital converter. Design a suitable instrumentation amplifier circuit. Vsupply thermocouple Vout Instruni op Amp ADC DoutSpecify the value of the Rr of the driven-right-leg circuit shown below such that for lμA current flowing through the body (i=1uA), the common mode voltage (Vcm) would be reduced to 2 mV. Assume OP-AMPs are ideal (with high input impedance). RLA LA W 150k0 RL RRA RAM 150k Ras 150kQ 2k12 R₁ 2kQ 21:02 www R₁ R₁ ww R. 2010 R₁ 15kQ Auxiliary op amp R₂In a summing inverting amplifier,Rf is 100k ohms, V1 is a sinusoid with 2V amplitude and frequency of 1Hz ,R1 is 10k ohms, V2 is a sinusoid with 3V amplitude and frequency of 1Hz, and R2 is 10k ohms. Vs+ = 18 V and Vs- = ground. What is the output voltage? Please draw the waveform as well.
- I designed a summing amplifier that could amplify a 1mV sinusoid (Vina) into a sinusoid with 1V amplitude and 3.5V offset. The value for R1a is 1k ohms, for R1b is 1mega ohms, R2 is 1 mega ohms, and Vin b is -3.5V. What is the input offset voltage?1. An op amp has a GBP of 10. A 0.3 uV sinusoidal signal at 5 KHz is required to be amplified to 5 V. Calculate the gains and draw the schematic circuit to achieve this. II. K type thermocouple having a range of 0- 350 °C and a sensitivity of 40 uV C. The signal is connected to an instrumentation amplifier before interfacing it with 5V analog to digital converter. Design a suitable instrumentation amplifier circuit. Vsupply thermocouple Vout Instrum op Amp Dout ADC3. A generic op-amp circuit is shown in Figure 3. With the given data, answer the following by showing the corresponding circuit and by explaining your answer or presenting the solution. a. If VA-0, VB-1V, RA-RB-10kQ, R1=70kQ, R2=00 and vout-8V, which terminal (A or B) is the noninverting input? b. If VA-10, VB=0V and B is the inverting input, select RA, RB, R1, and R2 and to obtain an output voltage of 20V. c. If VA=VB=1V, R1=0, R2=∞ and Vout=1V, which terminal (A or B) is the inverting input? R2 VA RA OVout RB B VB R1
- bls 3 Why the amplifier called a unity - gain while it provides 180 degree phase ? inversionDesign a three-stage amplifier that is impedance matched (use an emitter follower in stage 2) with an overall voltage gain of approximately 400. The phase of the input and output signal should be maintained. The amplifier should have a usable bandwidth of approximately 20MHz. As engineers you are expected to provide mathematical calculations, circuit diagrams and simulations in multisim software. The simulations should show a sample input signal, its output signal and frequency response plot of the three-stage amplifier.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 O
- In the circuit shown below the op-amp slew rate is SR=05 V/us. If the amplitude of input signal is 0.02 V, then the maximum frequency that may be %3D used is 240 k2 10 kFigure 6 (a) shows the circuit diagram for a differential amplifier. You may assume that M1 and M2 have identical parameters. Referring to Figure 6 (a): (а) What kind of amplifier is it? What is its role in a three-stage op amp? Draw the small signal equivalent circuit and derive the differential voltage gain Adiff. For the analysis consider RD1 = RD2 = RD, gml = gm2 gm, and rol = ro2 =r >>Rp. State any assumption. (b) What is the new Adiff in the circuit of Figure 6 (b), where a PMOS current source has replaced the two drain resistors RpI = RD2 = RD and a NMOS current sink has replaced the source resistor Rs? (c) What are the advantages in using the circuit of Figure 6 (b) instead of Figure 6 (a) to realize an op amp? (d) VDD VDD M6 Vo M5 RB Rp1 Rp2 Vo M1 M2 V12 Vil M1 M2 Vi2 Vi1 M4 M3 Rs Vss = 0 V %3D Vss = 0 V Figure 6(b) Figure 6 (a)I. Design a suitable op amp circuit to implement the following equation: dv. f = 6(2V, – 4V2) – 3 V, + 2- dt II. An op amp has a GBP of 10°. A 0.8 uV sinusoidal signal at 10 KHz is required to be amplified to 5 V. Calculate the gains and draw the schematic circuit to achieve this.