Op Amp Circuits. Op amps are very versatile devices. The term op amp or opamp stands for operational amplifier.
Operational amplifier op amp is a type of voltage amplifier that provides thousands output gain more than the potential difference which is applied at it input s. Operational amplifiers are linear devices that have all the properties required for nearly ideal dc amplification and are therefore used extensively in signal conditioning filtering or to perform mathematical operations such as add subtract integration and differentiation. You can put together basic op amp circuits to build mathematical models that predict complex real world behavior.
The most basic circuit is the voltage buffer as it does not require any external components.
As long as the input is at 0v there will be no current through the resistor r1 as the inverting input of the lm324 is at virtual ground. You can operate op amp both with ac and dc signals. In the op amp integrator circuit the capacitor is inserted in the feedback loop and creates a cr time constant with r1 at the inverting input. A conventional op amp operational amplifier can be simply described as a high gain direct coupled amplifier block that has a single output terminal but has both inverting and non inverting input terminals thus enabling the device to function as either an inverting non inverting or differential amplifier.
