What is meant by Class C tuned amplifier?
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°.
Why is Class C amplifier called a tuned amplifier?
modulators, where a high-frequency signal is controlled by a low-frequency signal. Therefore, Class C amplifiers are also called Tuned Amplifiers. resonant circuit load, so the resistive load is used only for the purpose of illustrating the concept. on for only a small percentage of the input cycle.
What is the advantages of Class C tuned amplifier?
➢ The Class C amplifier is used in the applications like RF oscillators, RF amplifier, FM transmitters, Booster amplifiers, High frequency repeaters and Tuned amplifiers. ➢ The main advantage of the Class C amplifier is, it has a Lowest physical size for a given power output.
Why the Class C amplifier must be used in conjunction with a tuned circuit?
1. A class C PA is used where large amounts of RF energy need to be generated with high efficiency. 2. Class C RF amplifiers must be used in conjunction with tuned circuits or cavities, which restore the amplified waveform through the flywheel effect.
What are the advantages of tuned amplifiers?
Advantages of Tuned Amplifiers
- The usage of reactive components like L and C, minimizes the power loss, which makes the tuned amplifiers efficient.
- The selectivity and amplification of desired frequency is high, by providing higher impedance at resonant frequency.
Why can’t a Class C amplifier be used as an audio amplifier?
However, the class C amplifier is heavily biased so that the output current is zero for more than one half of an input sinusoidal signal cycle with the transistor idling at its cut-off point. Therefore, class C amplifiers are not suitable for use as audio amplifiers.