Abstract: A bipolar junction transistor (BJT) used as a synchronous rectifier (SR) that is turned off by an active electronic device such as a transistor coupled between the base and collector of that SR BJT. The turn-off transistor functions to rapidly remove stored charge from the collector-base junction of the SR BJT when appropriate. Various active electronic devices are discussed as implementations of the turn-off transistor, including bipolar and field effect transistors of same or opposite polarity. Various anti-saturation and base current increasing circuits are also disclosed.

Abstract: The invention related to a resonance inverter comprising a resonance circuit with at least one inductance and one capacitors, a switch circuit electrically connected to the resonance circuit comprising at least one power electronic component, as well as a control circuit for controlling each power electronic component in accordance with a given control algorithm or strategy, the control circuit being electrically connected to the switch circuit. The unique feature of the invention is that the resonance inverter additionally comprise a pulse generating circuit (12′; 15; 32′, 31) having at least one control inductance (12′, 32′) which is inductively coupled to at least one of the inductances (12; 32) of the resonance circuit, whereby energy is transferred inductively to the resonance circuit.