EEET 2276 Electrical Principles

1. Design an operational amplifier circuit using an LM741 op-amp and a 10k? feedback resistor that represents the diagram shown in Fig 1 to produce the output voltage:

Vout = - (A1V1 + A2V2)

• Clearly write your ID number in Table 1

Table 1

Your ID Number =

• Set up the required gain numbers as follows and write them in Table 2:

A1 = the last digit of your ID number + 5

A2 = the 2^nd last digit of your ID number + 5 If A1 is equal to A2 then add 1 to A2

Table 2

1. Draw in the box below a circuit diagram for the op-amp circuit that implements the equation

Vout = -(A1V1 + A2V2)

Show pin numbers / labels and show all components used.

2. In Table 3 below calculate the resistor values and choose standard resistor values from the E12 series.

You need to select the arithmetically nearest E12 value. If two E12 resistance values are equally near, choose the lowest one.

Calculated resistor values

Selected from E12 series resistor values

3. In Table 4 calculate the new exact values of A1 and A2 using the new E12 values selected in step c.

4. Calculate the output voltage Vout for the circuit if:

V1 = [the 3^rd last digit of your ID number (in mV) X 10] + 50 mV V2 = [the 4^th last digit of your ID number (in mV) X 10] + 10 mV

Table 5

V1 =

V2 =

Vout =

5. Use MULTISIM or TINA circuit simulation to create the op-amp circuit and print a clear screen shot for a fully labelled diagram of the simulated circuit with the voltmeters displays showing both the input and the output voltages. All voltage levels MUST be shown.

6. Calculate Iout.

Table 6

Iout =