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Power Amplifier. The function of a power amplifier is to raise the power level of input signal. It is required to deliver a large amount of power and has to handle large current. The characteristics of a power amplifier are as follows −. The base of transistor is made thicken to handle large currents. The value of β being (β > 100) high.
- Classification of Power Amplifiers
Power amplifiers are divided into two categories, based on...
- Class Ab and C Power Amplifiers
Class C Power Amplifier. When the collector current flows...
- Class a Power Amplifiers
Class A Power Amplifiers - We have already come across the...
- Direct Coupled Amplifier
The input signal when applied at the base of transistor T 1,...
- Classification of Power Amplifiers
Class C Power Amplifier. When the collector current flows for less than half cycle of the input signal, the power amplifier is known as class C power amplifier. The efficiency of class C amplifier is high while linearity is poor. The conduction angle for class C is less than 180 o.
Power amplifiers are divided into two categories, based on the frequencies they handle. They are as follows. Audio Power Amplifiers − The audio power amplifiers raise the power level of signals that have audio frequency range (20 Hz to 20 KHz). They are also known as Small signal power amplifiers.
Some amplifier class designs listed below use RLC resonators or multiple power-supply voltages to reduce power loss, or are digital DSP (digital signal processing) type amplifiers which use pulse width modulation (PWM) switching techniques.
11 Δεκ 2018 · Learn about the different power amplifier classes such as Class A amplifier, Class B Amplifier, Class AB Amplifier, Class C Amplifier, Class D Amplifier with their designs and diagrams.
POWER AMPLIFIER. 2.0 Introduction. The main characteristics of an amplifier are Linearity, efficiency, output power, and signal gain. In general, there is a trade off between these characteristics. For example, improving amplifier’s linearity will degrade its efficiency.
9 Ιαν 2014 · Class C power amplifier is a type of amplifier where the active element (transistor) conduct for less than one half cycle of the input signal. Less than one half cycle means the conduction angle is less than 180° and its typical value is 80° to 120°.
