Lab 7: Op amps 1

Intro:

The purpose of this lab is to use an operational amplifier to produce an output of 0 to 10 volts, draw no more than 1mA, and supply no more than 30mW of power.

Experiment:

Component      Nominal Value            Measured Value

R_f                     2KΩ                             2.14kΩ

R_f                     2.2KΩ                          2.15KΩΩ

R_X                     12KΩ                           11.16KΩ

R_Y                     100Ω                           98Ω

V1                    12V                              12.28V

V2                    12V                              12.09V

Data:

            V_IN        V_OUT     GAIN    V­­_Ri        I_Ri                     V_Rf

            0.0V     0            0          0          0                      0

            0.25V   2.48V   10        .249V   .115mA            .248V

            0.50V   4.97V   10        .500V   .231mA            .500V

            0.75V   7.48V   10        .751V   .348mA            .750V

            1.00V   10.03V 10        1.007V .466mA            1.006V

At V_IN = 1.00V 

I_V1 = 1.731 mA             I_V2 = 1.276 mA

Analysis:

P_V1 = V*I=12.2(.001727)= 21.21mW

P_V2 = V*I=12.09(.00126)= 15.43mW

The circuit satisfies the power constraint of 30mW. The circuit  can out put 10V with about 1mA of current.