Abstract: A switched mode power supply is provided. The switched mode power supply includes an active clamped flyback converter with one or more GaN-based power semiconductor transistors and a planar transformer. The planar transformer includes a magnetic core and primary and secondary planar coil windings. The magnetic core includes a lower core and an upper core. The lower core has at least three projections including a central projection and two peripheral projections. The central projection is configured to accept the primary and the secondary planar coil windings which surround the central projection. The central projection has a stepped upper surface such that first and second gaps of different spacings are formed between the lower core and the upper core when the two peripheral projections contact the upper core.

Abstract: The present invention provides a high efficiency, high density GaN-based power converter comprising: a transformer; a magnetic coupler; a primary switch; a secondary switch; a primary controller; a secondary controller; a multi-layered print circuit board (PCB) comprising: one or more planar coils respectively formed on one or more PCB layers and aligned with each other for constructing the transformer and the coupler; and a plurality of conducting traces and vias for providing electrical connection among the transformer, the coupler, a primary switch, a secondary switch, a primary controller and a secondary controller. The power converter further comprises a pair of ferrite cores being fixed to a top surface and a bottom surface of the PCB respectively and commonly shared by the transformer and the coupler.

Abstract: The electronic circuits and semiconductor device having the same are provided. The electronic circuit includes: a first transistor including a first electrode coupled with an input voltage; a second transistor including a first electrode coupled with a second electrode of the first transistor; a first capacitor coupled between the first transistor and the second transistor; a first diode including a first terminal coupled with the first electrode of the first transistor; a second diode including a first terminal coupled with a second terminal of the first diode and a second terminal coupled with a second electrode of the second transistor; a second capacitor coupled between the first transistor and the first diode; and a third capacitor coupled between the first diode and the second transistor.

Abstract: A testing circuit includes a first circuit and a second circuit. The first circuit has a first capacitor and a second capacitor. The first circuit is configured to transfer at least a portion of a first voltage across the first capacitor to the second capacitor. The second circuit has the first capacitor and the second capacitor. The second circuit is configured to transfer at least a portion of a second voltage across the second capacitor to the first capacitor.

Abstract: The present invention provides a multi-functional printed circuit board (PCB) for assembling a plurality of components of a power converter in to a single package. The PCB comprises: one or more planar coils respectively formed on one or more PCB layers and aligned with each other for constructing the transformer and the coupler; and a plurality of conducting traces and vias for providing electrical connection among the plurality of components of the power converter.

Abstract: The present invention provides a multi-functional printed circuit board (PCB) for assembling a plurality of components of a power converter in to a single package. The PCB comprises: one or more planar coils respectively formed on one or more PCB layers and aligned with each other for constructing the transformer and the coupler; and a plurality of conducting traces and vias for providing electrical connection among the plurality of components of the power converter.

Abstract: The present invention provides a high efficiency, high density GaN-based power converter comprising: a transformer; a magnetic coupler; a primary switch; a secondary switch; a primary controller; a secondary controller; a multi-layered print circuit board (PCB) comprising: one or more planar coils respectively formed on one or more PCB layers and aligned with each other for constructing the transformer and the coupler; and a plurality of conducting traces and vias for providing electrical connection among the transformer, the coupler, a primary switch, a secondary switch, a primary controller and a secondary controller. The power converter further comprises a pair of ferrite cores being fixed to a top surface and a bottom surface of the PCB respectively and commonly shared by the transformer and the coupler.

Abstract: The present invention provides a high efficiency, high density GaN-based power converter comprising: a transformer; a magnetic coupler; a primary switch; a secondary switch; a primary controller; a secondary controller; a multi-layered print circuit board (PCB) comprising: one or more planar coils respectively formed on one or more PCB layers and aligned with each other for constructing the transformer and the coupler; and a plurality of conducting traces and vias for providing electrical connection among the transformer, the coupler, a primary switch, a secondary switch, a primary controller and a secondary controller. The power converter further comprises a pair of ferrite cores being fixed to a top surface and a bottom surface of the PCB respectively and commonly shared by the transformer and the coupler.

Abstract: The present invention provides a multi-functional printed circuit board (PCB) for assembling a plurality of components of a power converter in to a single package. The PCB comprises: one or more planar coils respectively formed on one or more PCB layers and aligned with each other for constructing the transformer and the coupler; and a plurality of conducting traces and vias for providing electrical connection among the plurality of components of the power converter.

Abstract: The application relates to a device and method for measuring a high electron mobility transistor. The device provided includes a controller, a protection circuit, a load circuit and a switching circuit electrically connected between the load circuit and the protection circuit. The controller is configured to provide a first control signal having a first value to a semiconductor component at a first time point and provide a second control signal having a second value to the switching circuit at a second time point. The semiconductor component is turned on by the first value of the first control signal, and the switching circuit is turned on by the second value of the second control signal. The second time point is later than the first time point.

Abstract: comprising sliding rails includes a base, a connecting piece, a plurality of elastic pieces and a slider. The connecting piece passes through the elastic pieces and the slider, and is fixedly mounted on the base. The base has a pair of sliding chutes and a plurality of block pieces. The slider has a pair of sliding strips and a plurality of plates. The elastic pieces are located between the block pieces and the plates. The slider is accommodated in the sliding chutes via the sliding strips and slides on the base along the sliding chutes. After the slider slides for a certain distance relative to the base, the elastic pieces makes the slider to back to the original position.

Abstract: A sliding rail includes a base, a connecting piece, a plurality of elastic pieces and a slider. The connecting piece passes through the elastic pieces and the slider, and is fixedly mounted on the base. The base has a pair of sliding chutes, a plurality of block pieces and a pair of POM grooves embedded into the sliding chutes. The slider has a pair of sliding strips and a plurality of plates. The elastic pieces are located between the block pieces and the plates. The sliding strips of the slider are accommodated in the POM grooves and slide on the base along the POM grooves. After the slider slides for a certain distance relative to the base, the elastic pieces makes the slider to back to the original position.

Abstract: Systems, methods, and non-transitory computer readable media can identify a user associated with a device based on a subset of media content items on the device based at least in part on analysis of the subset of media content items. A relationship between the user and one or more other users depicted in the media content items can be determined. A recommendation relating to sending at least one media content item on the device to at least of the one or more other users can be generated based on the determined relationship.

Abstract: Examples relate to scaling persistent connections for cloud computing. In some examples, a data packet is used to determine connection information of the first connection. At this stage, server portion of the first connection is closed by using the connection information to send a close command to the cloud server. In response to a keepalive signal from the client computing device, the connection information is used to send a keepalive response to the client computing device to maintain a client portion of the first connection. In response to a service request from the client computing device, a service notification including the service request is sent to the client computing device, where the client computing device initiates a second connection with the cloud server to process the service request.

Abstract: Systems, methods, and non-transitory computer readable media can identify a user associated with a device based on a subset of media content items on the device based at least in part on analysis of the subset of media content items. A relationship between the user and one or more other users depicted in the media content items can be determined. A recommendation relating to sending at least one media content item on the device to at least of the one or more other users can be generated based on the determined relationship.

Abstract: Examples relate to scaling persistent connections for cloud computing. In some examples, a data packet is used to determine connection information of the first connection. At this stage, server portion of the first connection is closed by using the connection information to send a close command to the cloud server. In response to a keepalive signal from the client computing device, the connection information is used to send a keepalive response to the client computing device to maintain a client portion of the first connection. In response to a service request from the client computing device, a service notification including the service request is sent to the client computing device, where the client computing device initiates a second connection with the cloud server to process the service request.