What is a voltage follower?

Operational amplifiers (op amps) are linear devices that have all the characteristics required for nearly ideal DC amplification and are therefore widely used in signal conditioning or filtering or performing mathematical operations such as addition, subtraction, integration, and differentiation
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operational amplifier circuits
Voltage follower
Inverting the op-amp
Non-inverting op amp
Non-inverting summing amplifier
Inverting summing amplifier
Differential amplifier
Integrator
Op amp differentiator
current-to-voltage converter
Negative resistance
Peak detector operation amplifier
ic
circuits