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 (Cp), comprising a half-bridge structure consisting of two switches (M1, M2), which is connected between a supply terminal (VS) and a reference terminal (GND), 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 (L2) connected in series with a capacitive element (C2) 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.