Question
Download Solution PDFThe cross-over distortion behaviour characteristic of:
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KVS TGT WET (Work Experience Teacher) Official Paper
Answer (Detailed Solution Below)
Option 4 : class - B output stage
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Detailed Solution
Download Solution PDFConcept:
- Crossover distortion is the term given to a type of distortion that occurs in push-pull class AB or class B amplifiers.
- It happens during the time when one side of the output stage shuts off, and the other turns on.
- If there is a difference in the timing of on and off of two stages of the transistor, cross-over distortion occurs.
- The cross-over distortion in the class B power amplifier is eliminated by the Class AB power amplifier which uses diodes at the bases of transistors to reduce forward bias voltage at bases i.e. by biasing the transistors slightly above the cut-off.
Application:
Class A Amplifier: No Crossover Distortion occurs as they are biased in the center of the load line. Class B Amplifiers: Large amounts of Crossover Distortion due to biasing at the cut-off point. Class AB Amplifiers: Crossover Distortion is avoided as the biasing level is above the cut-off.Last updated on May 8, 2025
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