67. Multi-Transistor Amplifiers : Amplifier With Active Load (Part B)
The chapter covers the fundamentals of active loads in common emitter and common source amplifiers, focusing on improving voltage gain and managing feedback effects. It highlights how the operating point can be easily achieved by employing specific circuits while ensuring that unintended gain reduction is mitigated through bypass capacitors. The analysis includes practical circuits and their impact on output resistance and overall amplifier performance.
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What we have learnt
- The use of feedback connections is essential for stabilizing operating points in amplifier circuits.
- Introducing bypass capacitors can prevent signal feedback that may negatively affect gain.
- Understanding practical applications of theoretical concepts ensures effective amplifier design.
Key Concepts
- -- Active Load
- An active load is a circuit component that improves the performance of amplifying devices by providing a controlled load for better voltage gain.
- -- Feedback Connection
- A feedback connection is a method used to stabilize the operating point of an amplifier by feeding output signals back to the input.
- -- Bypass Capacitor
- A bypass capacitor is used in amplifier circuits to ground unwanted AC signals while allowing DC signals to pass, helping to maintain gain integrity.
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