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Definition of "class C amplifier" |
A class C amplifier is a form of switching amplifier in which the transistors are on for less than a half cycle (less than 180 degrees) often, much less. Class C amps are very efficient because the transistors are off most of the time and when they are on, they are in full conduction. They deliver high distortion and are often used in RF circuits, where tuning circuits restore some of the original signal and reduce distortion. They are also used in low fidelity applications where the distortion is not important, such as a siren speaker driver. / (1) a current source amplifier biased beyond the conduction cutoff such that operation will not begin until the input signal reaches a specific amplitude, and results in less than half of an input sinusoid being amplified. If the signal amplitude is increased sufficiently, saturation and the associated clipping will occur. Thus the conduction angle is between 0 and 180 degrees, regardless of amplitude. Device saturation is usually avoided. |
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