Output stages and power amplifiers

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Output stages and power amplifiers

• Low output resistance
• Efficient power delivery

Characteristics of npn BJT
2
Classification of Output Stages
Class B
sinusoidal input signal
Class A
Class AB
3
Class A Output Stage
emitter follower
4
Class A Output Stage
transfer characteristic
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Signal Waveforms
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Power-Conversion Efficiency
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Class B Output Stage
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Class B Output Stage
transfer characteristic
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Power-Conversion Efficiency
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Power Dissipation
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Crossover Distortion