Amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load

摘要

The present invention relates to an amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load, comprising a half-bridge structure consisting of two switches, which is connected between a supply terminal and a reference terminal, the mid-point of said structure being connected to said capacitive load, and a soft-switching circuit with energy recovery. To limit the conduction losses in the amplifier, the soft-switching circuit with energy recovery comprises no active component, such as a diode or transistor. According to the invention, it is formed only from an inductive elements connected in series with a capacitive element between the terminals of said capacitive load. Advantageously, the inductive element comprises a saturable inductor in order to limit the conduction losses of the amplifier.