Abstract: A power switch device driver with energy recovery is discussed. The power switch device adopts four switches and one inductor with appropriate control to insure the switching speed and save the power loss.

Abstract: A gate driver is configured to drive a normally-on device and a normally-off device coupled in series. The gate driver controls the normally-on device in response to a PWM signal, and to control a normally-off device to maintain ON in normal operations. If an under voltage condition of a negative power supply of a first driver used to drive the normally-on device, or a positive power supply of a second driver used to drive the normally-off device, or an input supply voltage is detected, the normally-off device is controlled to be OFF.

Abstract: A control circuit for controlling a multi-level buck converter having N pairs of switches serially connected between an input terminal and a logic ground, wherein N is an integer equal to or greater than 2. The control circuit has a comparing circuit, a selecting circuit and a delay circuit. The comparing circuit compares a voltage feedback signal indicative of an output voltage signal of the multi-level buck converter with a reference signal to generate a comparing signal. The selecting circuit generates N set signals based on the comparing signal. The delay circuit delays the N set signals to provide N delay set signals to control the N pairs of switches when the output voltage signal falls in ( 1 ± k ? % ) ? 1 N of an input voltage signal of the multi-level buck converter, ( 1 ± k ? % ) ? 2 N of the input voltage signal, . . . , or ( 1 ± k ? % ) ? N - 1 N of the input voltage signal, wherein k is a proportional coefficient.

Abstract: The present disclosure relates to methods and devices for graphics processing including an apparatus, e.g., a GPU. The apparatus may generate a table including a plurality of entries to store data associated with at least one of a constant value or an immediate value. The apparatus may also process, upon generating the table, first data including at least one of a constant value or an immediate value. Further, the apparatus may store, in the generated table, at least one of the constant value or the immediate value of the first data. The apparatus may also transmit, upon storing at least one of the constant value or the immediate value in the table, the table including the stored at least one of the constant value or the immediate value of the first data.

Abstract: A 3-D package structure for isolated power module is discussed. The package structure has metal trace in a support layer (e.g. a substrate board), which is covered by two magnetic films from both sides, thus an effective transformer is formed. An IC die which contains a voltage regulator is stacked above the support layer, which significantly reduces the package size.

Abstract: A multi-dimensional space load and fire test system for a tunnel structure, which includes a multi-point loading self-balancing reaction force system having a rigid platform, two furnace body side-sealing apparatuses (22) and a model assembly and transport apparatus (23) for transporting and situating a tunnel model are on a track on the rigid platform (9), the two furnace body side-sealing apparatuses (22) are respectively used for sealing two end openings of the tunnel model, a tower-type combustion vehicle can be placed within an inner cavity of the tunnel model, a plurality of sets of evenly distributed self-adaptive loading apparatuses (3) used for exerting loading forces on an outer wall of the tunnel model are connected between two reaction force frames (1) of the multi-point loading self-balancing reaction force system.

Abstract: A multi-dimensional space load and fire test system for a tunnel structure, which comprises a multi-point loading self-balancing reaction force system having a rigid platform, two furnace body side-sealing apparatuses (22) and a model assembly and transport apparatus (23) for transporting and situating a tunnel model are on a track on the rigid platform (9), the two furnace body side-sealing apparatuses (22) are respectively used for sealing two end openings of the tunnel model, a tower-type combustion vehicle can be placed within an inner cavity of the tunnel model, a plurality of sets of evenly distributed self-adaptive loading apparatuses (3) used for exerting loading forces on an outer wall of the tunnel model are connected between two reaction force frames (1) of the multi-point loading self-balancing reaction force system.

Abstract: The present disclosure relates to a technical field of coal mining, in particular to a surrounding rock stability control method adapted for a coal mining area main roadway. The method comprises the following steps: reinforcing support on a roof and two sides of the mining area main roadway on a basis of an original support form; digging a safety roadway along a stop line of a present working face required by coal mine design, and supporting the safety roadway, wherein a protective coal pillar is formed between the safety roadway and the mining area main roadway; performing slitting blasting on the roof in the safety roadway, wherein blast holes are arranged on a roadway corner line on one side of the present working face to form a pre-splitting slit; and performing stoping at a next working face after completing coal mining at the present working face when stoping at the present working face advances to the safety roadway.

Abstract: A growth device and method for low-stress crystals are provided, which relate to the field of preparation of crystals, in particular to a device and method for preparing low-stress and low-defect crystals by using a pulling method. The growth device includes a furnace body; a crucible and a heating and insulation system which are arranged at a bottom of the furnace body; a crystal pulling mechanism, and a quartz observation window; the device further includes a liftable heating mantle mechanism including a heating mantle body, a heating mantle supporting component, a heating wire arranged around the heating mantle body, and a heating mantle lifting mechanism. The method includes: after crystals are pulled out of a melt, covering the crystals with a liftable heating mantle mechanism.

Abstract: A rocking type seed crystal surface corrosion, cleaning and drying device and a process method belong to the technical field of semiconductor crystal growth, comprising a corrosion tank and a matched corrosion tank cover, a seed crystal support platform arranged at a middle position of the bottom of the corrosion tank, and a high-purity hot nitrogen introduction short straight pipe, an corrosive liquid introduction short straight pipe, a deionized water introduction short straight pipe and an overflow liquid discharge short straight pipe matched with and arranged at both sides of the corrosion tank, wherein free ends of the high-purity hot nitrogen introduction short straight pipe, the corrosive liquid introduction short straight pipe and the deionized water introduction short straight pipe are all provided with switch stop valves; the device further comprises a rocking mechanism provided at the bottom of the corrosion tank; and the seed crystal support platform comprises a support frame symmetrically distrib

Abstract: A precharge system and method are provided. The precharge system comprises a load circuit, a precharge circuit and a control circuit. The load circuit comprises an input terminal, an input switch and a bus capacitor. The precharge circuit comprises a precharge resistor and a precharge switch. The precharge method comprises: during the load circuit being in a precharge mode, controlling the input switch to be in an off state, and controlling the precharge switch to switch between the on and off state for multiple times; and during the load circuit being in a work mode, controlling the input switch to be in an on state. During the load circuit being in the precharge mode, when the precharge switch is in the on state, a consuming power of the precharge resistor is larger than a threshold power and is smaller than or equal to a limit power of the precharge resistor.

Abstract: A 3-D package structure for isolated power module is discussed. The package structure has metal trace in a support layer (e.g. a substrate board), which is covered by two magnetic films from both sides, thus an effective transformer is formed. An IC die which contains a voltage regulator is stacked above the support layer, which significantly reduces the package size.

Abstract: The present disclosure relates to methods and devices for graphics processing including an apparatus, e.g., a GPU. The apparatus may generate a table including a plurality of entries to store data associated with at least one of a constant value or an immediate value. The apparatus may also process, upon generating the table, first data including at least one of a constant value or an immediate value. Further, the apparatus may store, in the generated table, at least one of the constant value or the immediate value of the first data. The apparatus may also transmit, upon storing at least one of the constant value or the immediate value in the table, the table including the stored at least one of the constant value or the immediate value of the first data.

Abstract: A control circuit for controlling multi-level buck converter. The multi-level buck converter has N pairs of switches, and N is an integer equal to or greater than 2. The control circuit has a comparing circuit comparing a voltage feedback signal with a reference signal to generate a comparing signal, a selecting circuit receiving the comparing signal to generate N set signals, and N COT controllers. The N set signals take turns to change from inactive state to active state at each rising edge of the comparing signal. Each of the N COT controllers receives output voltage signal, input voltage signal and one corresponding set signal of N set signals to generate a corresponding control signal to control the corresponding pair of switches to perform a complementary on and off switching.

Abstract: An automatic beverage maker having a water supply, a housing having a base, a body and a pod section, a sealed water tank within the housing body, a heating system for controlling the heating of water contained within the water tank, a first water line connecting the water supply to the water tank inlet, a second water e connecting the water outlet to the cavity of the housing pod section, a water pump for moving water from the water supply to the tank via the first water line and from the tank to the cavity of the housing pod section via the second water line. A drain line fluidly coupled to the sealed tank and having an open end for discharging water from the sealed water tank may also be used.

Abstract: A power switch device driver with energy recovery is discussed. The power switch device adopts four switches and one inductor with appropriate control to insure the switching speed and save the power loss.

Abstract: A power supply having at least one PMIC provides flexible control to the power manage systems. The PMIC has an enable pin configured to receive a control signal, and a clock pin configured to generate and/or receive a series of clock pulses, so as to facilitate the operation of the PMIC.

Abstract: In an embodiment, a method is configured to detect compromised credentials, comprising: generating a plurality of bloom filters, wherein each bloom filter corresponds to a particular subset of a set of compromised credentials; receiving an index value from a client computing device; in response to receiving the index value, determining a target bloom filter corresponding to the index value, and sending the target bloom filter to the client computing device; receiving a first value from the client computing device; in response to receiving the first value, generating a second value based on the first value, and sending the second value to the client computing device.

Abstract: A power supply having at least one PMIC provides flexible control to the power manage systems. The PMIC has an enable pin configured to receive a control signal, and a clock pin configured to generate and/or receive a series of clock pulses, so as to facilitate the operation of the PMIC.

Abstract: The invention discloses a method for cutting a substrate wafer from an indium phosphide crystal, and belongs to the field of semiconductor substrate preparation, comprises the following steps of: 1) orientating, cutting the head and the tail of a crystal bar, adjusting the orientation and trying to cut the crystal bar until a wafer with a required crystal orientation cut, wherein the cutting end face is an orientation end face; 2) multi-wire cutting, on a multi-wire cutting apparatus, dividing a crystal bar parallel to an orientation end face into wafers; 3) cleaning, cleaning the wafer until no residue and no dirt existing on the surface; 4) circle cutting, performing circle cutting on the wafer to cut the desired crystal orientation area.