The thesis gives a detailed description of the construction and operation of a hybrid amplifier consisting of linear and switching part. The combination of both allows achieving higher efficiency that would be achieved only with linear part, since the switching part takes over majority of the load current. The current terminating through a linear part is an opposite to the current ripple of switching part - the linear amplifier thus acts as a compensator for harmonic components caused by switching part of the amplifier circuit. For the purpose of efficient conversion a PWM inverter has been added to the amplifier, which allows the output voltage to reach an arbitrary value in the range of the supply voltage.
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