E ENG 209LAB EXPERIMENT 6 OPAMP BASICS NOTE You neod a dusl

E ENG 209-LAB EXPERIMENT #6 (OP-AMP BASICS) NOTE: You neod a dusl power supply (i.e. +12 and -12 V) for Lab7 This lab addresses the following course leaming objectivets) Understand hasics of OP-AMP Apply OP-AMIPs for various applications Devices required i. ii. ili. Three resistors of 10 k and two resistors of22 k An OP-AMP (LM 741) Power supplies for +Vee and-Vce 1. The inverting-amplifier circuit Wire the following circuit on the breadboard. Then fill out the given table for 5 different Vi values. Color Code Value 1O kohm 22 kOhm Resistor Measured Note RI R2 VIMeasured Vo Calculated Vo Note 0.2 0.5 1.0 1.5 2. The summing amplifier circuit Wire the following circuit on the breadboard. Then fill out the given table for 5 different VI values.

Solution

Ans) Inverting Amplifier Vo=-VI*R2/R1

Given R1=10K and R2=22 K

so Vo=-VI*22K/10K=-2.2 VI

Vo=-2.2*VI

For VI Vo

0.1 -0.22 V

0.2 -0.44

0.5 -1.1

   1.0 -2.2

1.5 -3.3

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2 Ans) Summing amplifier

Vo=-VI*(R4/R1+R3/R1+R2/R1)

R1=R2=R3=10K and R4=22 K

So Vo=-VI*(22K/10K+22K/10K+22K/10k)

Vo=-6.6 *VI

For VI Vo

0.1 -0.66 V

0.2 -1.32

0.5 -3.3

   1.0 -6.6

1.5 -9.9

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3Ans ) Difference Amplifier

Vo=-V1*(R2/R1)+V2*(R4/(R4+R3)*(1+R2/R1)

R1=10K, R2=22K, R3=10K, R4=22K

Vo=2.2*(V2-V1)

V1 V2 Vo

0 0.1 0.22

0.5 1 1.1

1 2 2.2

1.5 3 3.3

2 4 4.4