Question

Using the LM741 operational amplifier to build a voltage feedback amplifier shown in Fig. 1 with a closed-loop gain of |Af| = 50 V/V ± 20%. The small-signal model characteristics for the op-amp are: open-loop gain Avo=200V/mV, ri=2 M?, ro=75 ?, and open-loop Bandwidth BW = 5Hz. Figure 1 Voltage feedback amplifier Steps: 1. Complete your design by selecting appropriate R1 and R2 (please consider the resistors that are available as stated on page 1). Q1: What are the values of R1 and R2 in the circuit you designed? Please include key steps of deciding the values of R1 and R2. Hint: You may consider simplify your design by considering the op-amp to be ideal (i.e., infinite open loop gain, infinite internal input resistance Ri and zero internal output resistance Ro). In this case, you can apply the characteristics of ideal op-amp to simplify the calculation. Note: The design method in Hint is an approximate method. It might lead to some inaccuracy. Normally, the inaccuracy in very small for op-amp feedback amplifier circuits.

          Using the LM741 operational amplifier to build a voltage feedback amplifier shown in Fig. 1 with a closed-loop gain of |Af| = 50 V/V ± 20%. The small-signal model characteristics for the op-amp are: open-loop gain Avo=200V/mV, ri=2 M?, ro=75 ?, and open-loop Bandwidth BW = 5Hz.

Figure 1 Voltage feedback amplifier

Steps:
1. Complete your design by selecting appropriate R1 and R2 (please consider the resistors that are available as stated on page 1).

Q1: What are the values of R1 and R2 in the circuit you designed? Please include key steps of deciding the values of R1 and R2.

Hint: You may consider simplify your design by considering the op-amp to be ideal (i.e., infinite open loop gain, infinite internal input resistance Ri and zero internal output resistance Ro). In this case, you can apply the characteristics of ideal op-amp to simplify the calculation.

Note: The design method in Hint is an approximate method. It might lead to some inaccuracy. Normally, the inaccuracy in very small for op-amp feedback amplifier circuits.

Using the LM741 operational amplifier to build a voltage feedback amplifier shown in Fig. 1 with a closed-loop gain of |Af| = 50 V/V ± 20%. The small-signal model characteristics for the op-amp are: open-loop gain Avo=200V/mV, ri=2 M?, ro=75 ?, and open-loop Bandwidth BW = 5Hz.

Figure 1 Voltage feedback amplifier

Steps:
1. Complete your design by selecting appropriate R1 and R2 (please consider the resistors that are available as stated on page 1).

Q1: What are the values of R1 and R2 in the circuit you designed? Please include key steps of deciding the values of R1 and R2.

Hint: You may consider simplify your design by considering the op-amp to be ideal (i.e., infinite open loop gain, infinite internal input resistance Ri and zero internal output resistance Ro). In this case, you can apply the characteristics of ideal op-amp to simplify the calculation.

Note: The design method in Hint is an approximate method. It might lead to some inaccuracy. Normally, the inaccuracy in very small for op-amp feedback amplifier circuits.

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