54. Common Base and Common Gate Amplifiers (Contd.) : Numerical Examples (Part D)
The chapter delves into the design and analysis of common base and common gate amplifiers, focusing on their performance parameters such as voltage gain, output swing, and input impedance. It emphasizes the importance of understanding the achievable performance of circuits based on provided specifications and the challenges in designing these circuits. Various numerical examples illustrate the application of theoretical concepts to practical scenarios, aiding in grasping the design guidelines for selecting component values.
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What we have learnt
- Common base and common gate amplifiers have specific performance characteristics that must be matched to design requirements.
- Understanding device parameters is crucial for determining component values in amplifier circuits.
- Designing amplifiers requires careful consideration of voltage swings and impedances to achieve desired performance.
Key Concepts
- -- Common Gate Amplifier
- A type of amplifier configuration where the gate of the transistor is connected to a signal ground and serves as the input terminal, offering high input impedance and low output impedance.
- -- Common Base Amplifier
- An amplifier configuration where the base terminal of the transistor is common to both the input and output signals, typically used for high-frequency applications.
- -- Voltage Gain
- The ratio of the output voltage to the input voltage in an amplifier, indicating how much the amplifier increases the input signal.
- -- Input Impedance
- The impedance seen by the input source when connected to the amplifier, affecting the loading of the preceding stage.
- -- Output Swing
- The range of output voltage levels that an amplifier can provide, dictated by the supply voltage and circuit configuration.
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