48. Common Collector and Common Drain Amplifiers (Contd.): Numerical Examples (Part B) - B
This chapter delves into the design guidelines for common collector and common drain circuits while focusing on numerical analysis for these configurations. The output impedance, transconductance, and collector current calculations are emphasized as critical components of the design process. Moreover, the chapter outlines systematic approaches to circuit design through practical examples, laying a foundation for understanding additional configurations like common gate and common base.
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Sections
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What we have learnt
- The sequence for designing circuits involves starting with output resistance and calculating relevant parameters sequentially.
- Design guidelines for common collector and common drain circuits focus on utilizing given parameters such as voltage gain and load capacitance.
- Understanding the relationship between resistance, transconductance, and collector current is essential for optimizing circuit performance.
Key Concepts
- -- Common Collector Circuit
- A configuration where the collector terminal serves as a common terminal for both input and output, offering high input impedance and low output impedance.
- -- Common Drain Circuit
- Also known as a source follower, this configuration functions similarly to the common collector but is primarily used in MOSFET technology.
- -- Transconductance (gm)
- A measure of the rate of change of the output current as a function of the input voltage in a transistor, indicating the performance of the circuit.
- -- Output Impedance
- The resistance seen by the load when connected to the output of a circuit, critical for determining how the circuit will interact with subsequent stages.
- -- Upper Cutoff Frequency
- The frequency above which the gain of the circuit begins to drop, often determined by load capacitance and circuit resistance.
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