Operational Amplifiers

The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations...

The temperature detector fire alarm system consists of a thermistor sensor that initiates a small current flow in case of a fire. This signal is too weak to trigger the alarm system. So, the signals are amplified by an operational amplifier, often called an op amp, to activate the alarm system.

Op amp's are commercially available in a var...