3 Differential Amplifier Application Op-Amp circuits are fundamental building blocks in a wide range of signal processin

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3 Differential Amplifier Application Op Amp Circuits Are Fundamental Building Blocks In A Wide Range Of Signal Processin 1 (169.55 KiB) Viewed 16 times

3 Differential Amplifier Application Op-Amp circuits are fundamental building blocks in a wide range of signal processing applications, especially instrumentation, process control, digital-to-analog conversion, and analog-to-digital conversion. Consider the Differential Amplifier circuits in Fig. 3.1. The resistor values are shown on the Figures. R2 R Vio-W 10 kg V2 w ن 1 40 ΚΩ R2 VO R w 10 ΚΩ R3 V2W 10 ΚΩ R4315 ΚΩ R3 R w 10 ΚΩ R4 w 20 k 2 Vo 10 ΚΩ (a) (b) Figure 1.2: Differential Amplifier Circuits: (a) with One Op-Amp, (b) with two Op-Amps 3.1 Differential Amplifier Circuit Application with one Op-Amp [10% (a) Find an expression for the output voltage, Vo in Fig. 1.2 in terms of the inputs, V. and V2. (b) If Vcc= +12 V, and Vi= 2 V, what is the allowable range of V2 for linear operation of the Differential Amplifier? (c) Use Multisim to verify your solutions to part 3.1 (b) are correct: Simulate the circuit in Multisim and perform a DC sweep on V2 from-10 V to 10 V. See Appendix A. (d) Use the cursor to find your output at V2 = 0 V. How does the simulation output voltage compare with hand calculation? 3.2 Differential Amplifier Circuit Application with two Op-Amp [10%) (a) Find an expression for the output voltage, Vo in Fig. 1.2 in terms of the inputs, V, and V2. (b) If Vcc=+12 V, and Vi=2 V, what is the allowable range of V, for linear operation of the Differential Amplifier? (c) Use Multisim to verify your solutions to part 3.2 (b) are correct: Simulate the circuit in Multisim and perform a DC sweep on Vfrom-10 V to 10 V. See Appendix B. (d) Use the cursor to find your output at V2 = 0 V. How does the simulation output voltage compare with hand calculation? 3.3 Discussion and recommendations [10%) Compare and contrast the two cases in section 3.1 and 3.2 above. Discuss also the advantages and disadvantages of each case. 4 4 Design of Differential Amplifier In a particular application, it is necessary to implement a desired input-output relationship given by Equation 4.1. Vout = 2V: -471 (4.1) (a) ) Design a circuit using only one Op-Amp circuit that realizes this relationship, using configuration of Figure 2.1(a). [10%) (b) b Design a circuit using two-cascaded non-inverting Op-Amp circuits that realizes this relationship, using configuration of Figure 2.1(b). (10%)