Power amplifier
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The document summarizes different classes of power amplifiers: Class A amplifiers conduct through the full 360 degrees of the input signal with the Q-point set in the middle of the load line. Class B amplifiers conduct through 180 degrees of the input with the Q-point at 0V. Class AB is a compromise between A and B, conducting between 180-360 degrees with the Q-point between the midpoint and cutoff. Class C conducts less than 180 degrees with the Q-point below cutoff. Class D is biased for digital signals and has high efficiency.
Power amplifier
- 1. GREEN UNIVERSITY OF BANGLADESH Presentation On Power Amplifier And It’s Classes Presented by: Md. Nahid Hasan #ID: 161001008 Dept.: EEE Presented for: ………………………... Professor & Chairperson
- 2. What is power amplifier? An amplifier is an electronic device that can increase the power of a signal (A time-varying voltage or current). An amplifier uses electric power from a power supply to increase the amplitude of a signal.
- 3. Amplifier classes Class A Amplifier Class B Amplifier Class AB Amplifier Class C Amplifier Class D Amplifier
- 4. The amplifier conducts through the full 360 of the input signal. The Q-point is set at the middle of the load line so that the AC signal can swing a full cycle. Remember that the DC load line indicates the maximum and minimum limits set by the DC power supply. Class a amplifier
- 5. The amplifier conducts through 180 of the AC input signal. The Q-point is at 0V on the load line, so that the AC signal can only swing for one-half cycle. Class b amplifier
- 6. This is a compromise between the class A and class B amplifiers. The amplifier conducts somewhere between 180 and 360 of theAC input signal. The Q-point is located between the mid- point and cutoff level. Class ab amplifier
- 7. The amplifier conducts less than 180 of the input. The Q-point is located below the cutoff level. Class c amplifier
- 8. This is an amplifier that is biased especially for digital signals. Class d amplifier