Abstract: A switching circuit comprises a main switch element having a gate as a control input; and a ring oscillator connected as a driver circuit to the gate to drive the main switch via the gate. The basic circuit is used to build various components which have the property that they can work at very high frequencies.

Abstract: A T-type buck-boost power factor correction (PFC) rectifier (TBPR) comprises a power inductor, first and second storage capacitors, and first, second and third bi-directional switches. The first bidirectional switch connects a power supply input to a first end of the power inductor, the second bidirectional switch connects the first end of the power inductor to a first end of the first capacitor and the third bidirectional switch connects the first end of the power inductor to a first end of the second capacitor. At the same time, the second end of the first capacitor, the second end of the second capacitor and the second end of the power inductor are connected to a common node.

Abstract: An integrated circuit is built with enhancement mode Gallium Nitride (GaN) components. The integrated circuit comprises a comparator circuit which compares an input voltage with a reference voltage to provide a controllable constant current source, the comparator having a drive transistor having a positive threshold voltage, the drive transistor being switched on and off based on a comparison result of the comparator. The circuit may drive ring oscillators and may provide pulse width modulation with variable duty cycle at constant frequency.

Abstract: A switching circuit comprises a main switch element having a gate as a control input; and a ring oscillator connected as a driver circuit to the gate to drive the main switch via the gate. The basic circuit is used to build various components which have the property that they can work at very high frequencies.

Abstract: A method for controlling powering with a resonant fly-back power converter includes powering an output circuit including a load, with a inductor of a resonant fly-back power converter including a primary winding electrically connected to an input circuit of the fly-back converter and secondary winding electrically connected to the output circuit of the fly-back converter, operating the converter in a discontinuous conduction mode. Charging and discharging of the primary winding is controlled with a first and second switching element and a capacitor connected across the second switching element selected for resonating with the primary winding. Both first and second switching elements are operative to connect primary winding to an input voltage source over a defined on-time. The pulsing of the first and second switching elements is synchronized and the on-time of the second switching element is extended with respect to the on-time of the first switching element.