41. Frequency Response of CE/CS Amplifiers Considering High Frequency Models of BJT and MOSFET (Part B)
The chapter provides an in-depth analysis of the frequency response characteristics of Common Emitter (CE) and Common Source (CS) amplifiers, including high-frequency models for BJTs and MOSFETs. Key concepts such as the impact of loading capacitance and the significance of transfer functions are discussed, emphasizing the behavior of amplifiers in both low and high-frequency domains. Additionally, the chapter outlines methods for calculating poles and zeros in amplifier circuits, addressing practical implications in circuit design.
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What we have learnt
- The frequency response of CE and CS amplifiers is influenced by various capacitances and resistance configurations.
- Transfer functions are essential for understanding the input-output relationship and frequency characteristics of amplifiers.
- Poles and zeros in the frequency response indicate stability and performance in amplifier circuit design.
Key Concepts
- -- Transfer Function
- A mathematical representation that describes the relationship between input and output signals in a linear time-invariant system, often used for analyzing the frequency response of amplifiers.
- -- Cutoff Frequency
- The frequency at which the output signal power falls to half its value, which corresponds to a drop of 3 dB in voltage; it defines the operational bandwidth of amplifiers.
- -- Pole
- A frequency at which the gain of the amplifier reduces, influencing the stability of the circuit; poles are critical for determining the amplifier's frequency response.
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