Differential Op Amp. A differential amplifier also known as difference amplifier is a useful op amp configuration that amplifies the difference between the input voltages applied. Usually some types of differential amplifier comprise various simpler differential amplifiers.
Where v 1 and v 2 represent the voltages applied at its inverting and non inverting input terminals can be taken in any order and a d refers to its differential gain. In this configuration an op amp produces an output potential relative to circuit ground that is typically 100 000 times larger than the potential difference between its input terminals. Triangular wave input rectangular wave output.
Triangular wave input rectangular wave output.
The output voltage is given by. So far our application of negative feedback to op amps has resulting in the practical loss of one of the inputs the resulting amplifier only good for amplifying a single voltage signal input. In this configuration an op amp produces an output potential relative to circuit ground that is typically 100 000 times larger than the potential difference between its input terminals. An op amp operating in differential mode can readily act as a differential amplifier as it results in an output voltage given by.
