Applications of Op Amp

Amplification

Analog to digital conversion

Comparing two voltages and switching output accordingly

Filtering noise

Transformer

Operational amplifier

Inductor

Diode

It amplifies signals

It provides hysteresis, reducing false triggering due to noise

It works only with digital signals

It requires no power supply

Single threshold voltage

Two distinct switching threshold voltages (hysteresis)

Zero output impedance

Linear transfer characteristic

Work at high voltages only

Can rectify small signals accurately without diode voltage drop errors

Are cheaper than standard rectifiers

Do not require operational amplifiers

Low-pass filter

High-pass filter

Band-pass filter

Band-reject filter

Flat-flat filter

Ripple filter

Chebyshev filter

Notch filter

50% of maximum amplitude

0.707 of maximum amplitude (3 dB point)

0.5 of input voltage

Zero

Band-pass filter

Low-pass filter

High-pass filter

Band-reject filter

0.2

2

5

10