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Dear All, I want to get information from experienced audio amateurs for building class D power amplifier. Find More Posts by alant Many people here are satisfied with Hypex, search for a thread.
A W Class D Amplifier for m. The power can be varied from around 25 to W by increasing the supply voltage over a 12 to 32V range. Circuits are included to protect against excessive supply current and high reflected RF power. The amplifier is suitable for any non-linear mode.
There are three fewer questions in this section. The question on klystrons, for example, was removed. Some of the other questions were changed…Dan.
A class-D amplifier or switching amplifier is an electronic amplifier in which the amplifying devices transistors, usually MOSFETs operate as electronic switches, and not as linear gain devices as in other amplifiers. They operate by rapidly switching back and forth between the supply rails, being fed by a modulator using pulse width, pulse density, or related techniques to encode the audio input into a pulse train. The audio escapes through a simple low-pass filter into the loudspeaker.
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There are several classifications of amplifiers, based on their mode of operation. In a class A amplifier is always conducting current. That means that the bias of a Class A common emitter amplifier would normally be set approximately half-way between saturation and cutoff on the load line. One transistor turns on during the positive half of a cycle, while the other turns on during the negative half.