What is an Operational Amplifier (Op-amp) – Working, Pin-Diagram & Applications

An operational amplifier popularly known as op-amp is a DC-coupled high gain electronic voltage amplifier with a differential input and usually a single-ended output. As the name suggests, it is basically an amplifier, whose job is to amplify the input signals. The reason behind it being called as “operational” is that, in early days when … Read more

Bipolar Junction Transistor (BJT) – Symbols & Operation

A Bipolar Junction Transistor (BJT) is a current-controlled semiconductor device which has three-terminals. The current in BJT is carried by both majority and minority carriers so it is known as bipolar device. The input resistance of BJT is low so it is used as an amplifier, oscillator circuits and digital circuits. Note: The usage of … Read more

What is MOSFET | Types, Operation and Applications

The MOSFET (Metal Oxide Field Effect Transistor) is an active semiconductor device most widely used in Integrated circuits. It is a voltage-controlled device because the current between source and drain is controlled by the gate voltage. MOSFET is a unipolar device because the charge carriers that are responsible for current are either electron (in NMOS) … Read more

Instrumentation Amplifier – Advantages & Applications

An Instrumentation amplifier is a kind of differential amplifier with additional input buffer stages. The addition of input buffer stages makes it easy to match (impedance matching) the amplifier with the preceding stage. In other words, we can say that the differential op-amp circuit providing high input impedances with ease of gain adjustment through the variation … Read more

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