Lab 25 TF EIM

OP Amp applications

Construct the OP amp circuits and measure their range of operation with respect to the input frequency, voltage, and when appropriate their output load.

It will be a good idea to connect a [math]\displaystyle{ 0.1 \mu }[/math] F capacitor between [math]\displaystyle{ V_{cc} }[/math] and ground.

voltage follower/buffer amplifier

1. Why is this a buffer amplifier?
2. What is the input impedance ([math]\displaystyle{ R_{in} }[/math])?

Difference Amplifier

1. How can you make the input impedance the same for [math]\displaystyle{ V_A }[/math] and [math]\displaystyle{ V_B }[/math]?
2. Measure [math]\displaystyle{ V_{out} }[/math] for several values of [math]\displaystyle{ V_A }[/math] and [math]\displaystyle{ V_B }[/math]. Plot [math]\displaystyle{ V_{out} -vs- (V_B-V_A) }[/math] and compare the slope to R1 and R2.

Summing Amp

1. Measure [math]\displaystyle{ V_{out} }[/math] for several values of [math]\displaystyle{ V_A }[/math] and [math]\displaystyle{ V_B }[/math].
2. Use the above measurement to show how [math]\displaystyle{ V_A }[/math] and [math]\displaystyle{ V_B }[/math] are summed.

I-to-V converter

1. Plot the measured valued of I_{in} and V_{out} for the circuit above.

V-to-I converter

1. Plot the measured valued of V_{in}and I_{out} for the circuit above.

Forest_Electronic_Instrumentation_and_Measurement