Inverting Amplifier: Learning Outcomes
This experiment illustrates the working principle of an inverting amplifier. By the end of this experiment the student would be able to:
Understand the characteristics of an Inverting Amplifier
Appreciate the effect of resistors ratio in the gain of an amplifier
Build a simple alert system to indicate voltage thresholds limits
Differentiate between Inverting and non-inverting amplifier.
INVERTING AMPLIFIER OPAMP THEORY
An inverting amplifier using opamp is a type of amplifier using opamp where the output waveform will be phase opposite to the input waveform. The input waveform will be amplified by the factor Av (voltage gain of the amplifier) in magnitude and its phase will be inverted. In the inverting amplifier circuit, the signal to be amplified is applied to the inverting input of the opamp through the input resistance R1. Rf is the feedback resistor. Rf and Rin together determine the gain of the amplifier. Inverting operational amplifier gain can be expressed using the equation Av = – Rf/R1. a Negative sign implies that the output signal is negated.
Instructions
Select Inverting amplifier and Filtering tab
Change values of Resistors 1 and 2 and observe changes In waveforms.
Compare with the equation of an inverting amplifier