OP-Amp Labs
Part 1: Inverting Amplifer Theory The first lab with Op-Amps was to first get a very simple negative gain circuit working on a breadboard. In order to get a inverting gain we have to tie the positive terminal of the op-amp to the ground and drive power through the negative terminal. It is also required to tie feedback from the output to the negative input. Due to the large input resistance of the circuit there is practically no current running through those terminals, thus both positive and negative terminals are the same. When we have the positive to zero then we also have a zero voltage and the negative terminal.When you perform a nodal analysis of the negative input node then you can equate the current heading to the terminal as the current going through the feedback resistor. Experiment We set up this circuit and applied the voltages to the terminals while we measured the v-out with a multi-meter. Measurem...