Differential amplifier
Differential amplifier
A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs. It is a fundamental building block in analog circuits and is widely used in operational amplifiers, instrumentation amplifiers, and various other applications.
Operation[edit | edit source]
The differential amplifier operates by taking two input signals, typically denoted as V1 and V2, and producing an output voltage that is proportional to the difference between these inputs. The basic equation for the output voltage (Vout) of a differential amplifier is:
- Vout = A(V1 - V2)
where A is the differential gain of the amplifier.
Types of Differential Amplifiers[edit | edit source]
There are several types of differential amplifiers, including:
Applications[edit | edit source]
Differential amplifiers are used in a variety of applications, including:
- Audio amplifiers
- Analog-to-digital converters
- Data acquisition systems
- Sensor signal processing
Advantages[edit | edit source]
Some of the key advantages of differential amplifiers include:
- High common-mode rejection ratio (CMRR)
- Improved noise immunity
- Better linearity compared to single-ended amplifiers
Design Considerations[edit | edit source]
When designing a differential amplifier, several factors need to be considered:
See Also[edit | edit source]
- Operational amplifier
- Instrumentation amplifier
- Common-mode rejection ratio
- Analog circuit
- Electronic amplifier
Related Pages[edit | edit source]
- Operational amplifier
- Instrumentation amplifier
- Common-mode rejection ratio
- Analog circuit
- Electronic amplifier
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