Inverting amplifier

*It is a basic circuit with op-amp; *It uses negative feedback to stabilize the voltage gain; *The open loop gain (Avol) of an op-amp is very high and unstable without a feedback circuit; *An input voltage on R1 is received in inverting input; *This input produces an inverted output voltage; *The output voltage on Rf serves as feedback to the input; *The voltage gain is defined as: Av = -Rf/R1 - Rf -> feedback resistor - R1 -> input resistor