21 - 1 ECSE334 Introduction to Microelectronics ECSE 334...

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Unformatted text preview: 1 ECSE334 Introduction to Microelectronics ECSE 334 Introduction to Microelectronics Roni Khazaka Lecture #22 ECSE334 Introduction to Microelectronics 2 Khazaka - 2008 Class A amplifier Transistor Always ON Bias point All amplifiers we have seen so far belong to this category 360 conduction angle 2 ECSE334 Introduction to Microelectronics 3 Khazaka - 2008 Class B Amplifier Transistor is ON 50% of the cycle. Need a complimentary stage to provide power during the second half of the cycle. 180 conduction angle ECSE334 Introduction to Microelectronics 4 Khazaka - 2008 Class AB Amplifier Transistor is ON more than 50% of the cycle. Need a complimentary stage to provide power during the second half of the cycle. There is an overlap region when both stages are ON conduction angle >180 3 ECSE334 Introduction to Microelectronics 5 Khazaka - 2008 Class C Amplifier Transistor is ON for a very short periode each cycle (less than 50%). conduction angle <<180 Normally used in conjunction with an RLC tank circuit to filter out higher frequencies and extract the fundamental....
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This note was uploaded on 01/27/2011 for the course ECSE 334 taught by Professor Anashamoui during the Spring '10 term at McGill.

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21 - 1 ECSE334 Introduction to Microelectronics ECSE 334...

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