Inverting Operational Amplifier

Quick Start

The schematic is wired as shown in the diagram below. R_i = 1k and R_f = 10k. The WG amplitude is set to 80 mV, you may try a 1 volt input to observe the clipping of the the output, since it will exceed the op-amp supply voltage of +/- 6 volts.

Screenshot of the UI

Screen shot of the oscilloscope program showing inputs and output of an Inverting Amplifier. Theoretical Gain is -10

Exercises

• Calculate the gain by fitting A1, and A2 by enabling the check-boxes next to them. gain = output/input
• What is the gain if Rf < Ri .

Write Python Code

This experiment can also be done by running this Python Code.

import eyes17.eyes
p = eyes17.eyes.open()

from pylab import *

p.set_sine(200)
p.set_pv1(1.35) # will clip at 1.35 + diode drop 
t,v, tt,vv = p.capture2(500, 20) # captures A1 and A2

xlabel('Time(mS)') ylabel('Voltage(V)')
plot([0,10], [0,0], 'black')
ylim([-4,4])

plot(t,v,linewidth = 2, color = 'blue')
plot(tt, vv, linewidth = 2, color = 'red') 
show()