Transcription of Power Amplifiers - Learn About Electronics
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Power Amplifiers - Learn About Electronics
Module 5 Amplifiers Power Amplifiers Introduction to Power Amplifiers What you'll Learn in Module 5. Section Introduction to Power Amplifiers . Understand the Operation of Power Amplifiers . Section Power Transistors & Heat Sinks. Power Transistor Construction. Power De-rating & High Power Operation. Thermal Resistance of Heat Sinks. Thermal Runaway. Section Class A Power Amplifiers . The limitations due to the efficiency of class A Power Amplifiers . Transformer coupled Class A Power output stages. Section Class B Amplifiers . Class B biasing. Crossover distortion. Power Amplifiers Class B biasing.
Voltage and current amplifiers can make use of small transistors and do not draw large amounts of power from the power supply in order to amplify signals by often, very large amounts. However the small transistors they use have very tiny junction areas and so cannot handle the power needed to drive some output devices without overheating.
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