Inverting mode op amp

Talked about how to identify the inverting mode op amp today. Also proved the equation for an inverting amplifier through experiment and video contains a worked example using that equation.

Remember that the input resistor in inverting mode is connected to the negative (inverting) terminal. This resistor is R1 in the equation. Rf is the feedback resistor that 'loops' back from the output to the input. It is these resistors that determine the gain that the amplifier has i.e. how much it will increase the input voltage by.

An inverting amplifier not only changes the size of the input voltage but also changes (inverts) the sign. So a positive input will give a negative output and a negative input will give a positive output.