79. Differential Amplifier : Analysis and Numerical Examples (Contd.)
The chapter provides a comprehensive analysis of differential amplifiers, particularly focusing on numerical examples involving BJTs and MOSFETs. It covers the key aspects including DC operating points, small signal parameters, differential mode gain, and common mode gain. Practical examples illustrate how performance can be optimized in differential amplifiers.
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What we have learnt
- The analysis of differential amplifiers using BJTs and MOSFETs involves detailed considerations of operating points and gain characteristics.
- Understanding the distinction between differential mode and common mode signals is crucial for improving amplifier performance.
- Utilizing active components can significantly enhance the performance of differential amplifiers.
Key Concepts
- -- Differential Amplifier
- A circuit that amplifies the difference between two input signals while rejecting any signals that are common to both inputs.
- -- DC Operating Point
- The point at which the transistor operates in its active region, determined by the biasing of the junctions.
- -- Common Mode Gain
- The gain of the amplifier for signals that are common to both inputs.
- -- Differential Mode Gain
- The gain of the amplifier for signals that are different between the two inputs.
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