Abstract: The present invention provides a nitride-based multi-channel switching device having a plurality of transistors. The multi-channel switching device comprises a substrate, a plurality gate structures, a plurality of source electrodes and a plurality of drain electrodes. The gate structures, source electrodes and drain electrodes are grouped to form the plurality of transistors and arranged such that each gate structure disposed between a source electrode and drain electrode. Each group of the gate structures are electrically interconnected and connected to at least one gate pad corresponding to each of the transistor. Each group of the drain electrode are electrically interconnected and connected to at least one drain pad corresponding to each of the transistor. All groups of the source electrodes are electrically interconnected and connected to at least one common source pad.

Abstract: A frequency-hopping control method is performed by a frequency-hopping control module that generates a driving signal for driving a voltage converting circuit to generate an output voltage. The method includes, generating a control signal according to a regulating signal inversely proportional to the output voltage of the voltage converting circuit. The control signal is cyclical, and each cycle of which includes an off-time having a variable duration with an inverse relation to magnitude of the regulating signal, and an on-time having a substantially fixed duration. The driving signal is generated according to the control signal and a periodic pulse signal. Therefore, the output voltage can be stabilized, and the voltage converting circuit can perform voltage conversion with reduced power loss and improved voltage conversion efficiency.

Abstract: A frequency-hopping control method is performed by a frequency-hopping control module that generates a driving signal for driving a voltage converting circuit to generate an output voltage. The method includes, generating a control signal according to a regulating signal inversely proportional to the output voltage of the voltage converting circuit. The control signal is cyclical, and each cycle of which includes an off-time having a variable duration with an inverse relation to magnitude of the regulating signal, and an on-time having a substantially fixed duration. The driving signal is generated according to the control signal and a periodic pulse signal. Therefore, the output voltage can be stabilized, and the voltage converting circuit can perform voltage conversion with reduced power loss and improved voltage conversion efficiency.