Notes for A3.4.11 Operational amplifiers (op-amps) - IB | RevisionDojo
A3.4.11 Operational amplifiers (op-amps) Notes
Operational Amplifiers (Op-Amps)
Definition
Operational amplifier (op-amp)
An electronic device that amplifies weak signals.
An operational amplifier component
Key Characteristics
High-Gain Voltage Amplifiers: Op-amps can amplify weak signals to usable levels.
Differential Inputs: They have two inputs:
Inverting (-): Reverses the phase of the input signal.
Non-Inverting (+): Maintains the phase of the input signal.
Single Output: Provides the amplified signal.
Op-amps are often represented by a triangle symbol in circuit diagrams, with the inputs on one side and the output on the other (dewesoft)Note
Op-amps are often represented by a triangle symbol in circuit diagrams, with the inputs on one side and the output on the other.
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What is Op-Amp?
An operational amplifier (op-amp) is a versatile electronic component that amplifies weak electrical signals. These devices are fundamental building blocks in modern electronics, used in everything from audio equipment to medical devices.
Op-amps are designed to provide high gain (amplification) while maintaining stability and precision
They are typically powered by a dual power supply (e.g., +15V and -15V) to allow for both positive and negative output voltages
DefinitionOperational Amplifier (Op-Amp)A high-gain electronic voltage amplifier with differential inputs and a single-ended output, used to amplify weak electrical signals.
ExampleIn a heart rate monitor, op-amps are used to amplify the tiny electrical signals generated by the heart, making them large enough to be processed and displayed.
