parts 1 and 2
Basic operational amplifier circuits for inverting and non-inverting amplifiers are shown in Figures 1 and 2 respectively. These circuits will be constructed using a 741 (or a similar type operational amplifier) and + 10-V power supplies. RA VNI R RAVN2 RB is2 R in2 VPI Vouni VouT2 VP2 Vsi + Voll - A1 Vout2 A2 V1 V2 inl Figure 1. Non-Inverting Amplifier Figure 2. Inverting Amplifier = Vs Preliminary Calculations For the hand calculations, assume that the operational amplifier is ideal unless otherwise instructed. Vout! DV Step 1. For the circuit of Figure 1, write an expression for the voltage gain in terms of RA and Rg. Select a standard resistor value for R, such that 3.3k12 SR, 515k12 and select R, such that the gain calculated from the standard resistor values is given by A1 = 3 +10% (your instructor may assign a different gain value). Record the voltage gain calculated from the selected standard resistor values to two significant figures. Step 2. What is the input resistance Rel of the circuit of Figure 1? Which property of an ideal operational amplifier supports your conclusion? Using that same property, what fraction of the voltage at Vouti appears at Vni? Step 3. For the circuit of Figure 2, write an expression for the voltage gain 4,2 in terms of R V Vout2 1,2 and Rg. Using the same values for R, and R, as in Step 1, calculate the nominal voltage gain 42 from the standard resistor values to two significant figures.
parts 1 and 2
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