324results about How to "Increase working current" patented technology

A preparation method of a heteroatom doped graphene hierarchical pore carbon material comprises the following steps: preparing graphene micro-sheet dispersing liquid by using graphene, then carrying out pore-forming etching on graphene micro-sheets in the graphene micro-sheet dispersing liquid, and preparing porous graphene micro-sheets; mixing the porous graphene micro-sheets with a fatty acid metal compound coating agent and a dopant to obtain oil-phase viscous graphene-based precursor; carrying out programmed heat treatment; carrying out acid pickling, water washing and solid-liquid separation on a product after heat treatment, and drying solid to obtain the final product. The preparation method has the advantages of low cost, simple process, low energy consumption, wide raw material source, and capability of large-scale production.

A nitride semiconductor device includes: a first semiconductor layer made of first nitride semiconductor; a second semiconductor layer formed on a principal surface of the first semiconductor layer and made of second nitride semiconductor having a bandgap wider than that of the first nitride semiconductor; a control layer selectively formed on, or above, an upper portion of the second semiconductor layer and made of third nitride semiconductor having a p-type conductivity; source and drain electrodes formed on the second semiconductor layer at respective sides of the control layer; a gate electrode formed on the control layer; and a fourth semiconductor layer formed on a surface of the first semiconductor layer opposite to the principal surface, having a potential barrier in a valence band with respect to the first nitride semiconductor and made of fourth nitride semiconductor containing aluminum.

The invention discloses an electrolysis unit and a technology used for indirect electric oxo synthesis of organic matters and electrolytic regeneration of media. The electrolysis unit is formed by compression of a plurality of elementary electrolytic cells which are connected in series through a plate-and-frame filter press, wherein, the elementary electrolytic celles comprise anode chambers and cathode chambers which are separated off by cation diaphragms; the anode chambers and the cathode chambers are respectively provided with electrolyte inlets and electrolyte outlets which are communicated with electrolyte storage tanks; and anodes which are arranged inside the anode chambers adopt granular packed bed electrodes which take titanium baskets or titanium baskets provided with coatings as frame bodies. By adoption of the electrolysis unit, low valence state media which are generated during the process of indirect electric oxo synthesis of the organic matters are reoxidized and regenerated into high valence state media through electrolysis. The electrolysis unit has the advantages of large working current, convenient opening of a pressure filter for replacement of the diaphragms and filling of granules, compact structure and high space-time efficiency and is particularly suitable for indirect electric oxidation regeneration reaction by adoption of Mn<3+>/Mn<2+>, Ce<4+>/Ce<3+> and Cr2O7 <2->/Cr 3+> as media.

The invention provides an antenna device and a mobile terminal with the same. The antenna device comprises at least two layers of stacked coils; a second feed point electrically connected to an NFC (Near Field Communication) chip or an RFID (Radio Frequency Identification) chip is respectively arranged on the coils, and a first feed point electrically connected to a WPC (Wireless Power Consortium) chip or an FM (Frequency Modulation) chip is respectively arranged on the two coils of the surface; and the two adjacent layers of coils are isolated by an isolating unit, and the isolating unit is configured to isolate working signals of the NFC chip or the RFID chip. The antenna device realizes superposition of effective area of antennas via multilayer superposed coils, the coils can be connected or isolated to support two different functions, and multiplexing of the antenna device is realized; meanwhile, in the NFC or RFID working mode, the intensity of the radiation electromagnetic field can be improved, and the NFC or RFID communication performance is optimized.

The invention provides an electromagnetic under-voltage release comprising a filtering rectifying circuit, a sampling circuit, a power supply circuit, a control module, a driver module and an electromagnet. A direct-current resistance of a starting winding is less than a direct-current resistance of a working winding. According to the electromagnetic under-voltage release and the controlling method thereof, a microcomputer is used for controlling the control circuit, and the controlling thinking is clear and the circuit structure is simplified and ingenious. The starting winding-working winding dual-coil electromagnet is arranged at the circuit, and the direct-current resistance of the starting winding is less than the direct-current resistance of the working winding and the working current of the starting winding is high and the starting torque is large, so that the pull-in performance of the electromagnet can be ensured. And the working current of the working winding is low and thus the basic power for pull-in maintaining of the electromagnet is provided, so that the heating value is extremely low.

The invention discloses a static random access memory (SRAM) unit structure based on a fake contact etch stop layer (CESL) technology and a preparation method of the SRAM unit. In the production process of the SRAM, a tensile liner covers a pull-down transistor of the SRAM and a compressive liner covers a pull-up transistor and a channel transistor of the SRAM. According to the SRAM structure based on the fake CESL technology and the preparation method of the SRAM structure, provided by the invention, a beta value is increased by covering the tensile liner on the pull-down transistor (NMOS (N-channel Metal Oxide Semiconductor) device) and covering the compressive liner on the channel transistor (NMOS device), so that a static noise margin (SNM) is effectively increased and the aim of realizing the stability of the SRAM unit is realized.

The invention discloses a method for packaging a glass-silicon wafer-grade chiponboard (COB) of a light emitting diode (LED). The method comprises the following steps: 1, etching a silicon micro slot array with the micro slots communicated with each other through micro channels, and placing a proper amount of heat outgas agent in the micro slots; 2, performing anodic bonding on the Si wafer with patterns and the heat outgas agent and borosilicate glass wafer in air or in vacuum to form a sealed cavity; 3, heating and preserving heat to form a spherical glass micro cavity, cooling the cavity to normal temperature, annealing and removing silicon to obtain a wafer-grade glass micro cavity; 4, preparing a lead substrate; 5, mounting a chip and leading a wire; 6, carrying out wafer-grade bonding; and 7, filling silica gel to realize the wafer-grade packaging of the LED. By achieving the integration with the wafer-grade LED reflecting cup, the method reduces heat resistance and cost.

The invention discloses a method for packaging a wafer level glass micro-cavity of a light-emitting diode (LED), and the method comprises the following steps: (1) etching a micro-slot array corresponding to the pattern of a packaged LED array on a silicon wafer, wherein the micro-slots are communicated through a micro-channel, and a proper amount of heat gas releasing agent is arranged inside the micro-slots; (2) forming a closed cavity; (3) heating the bonded wafer in the air to form a spherical glass micro-cavity and a cylindrical glass micro-channel connected with the spherical glass micro-cavity, cooling to room temperature, annealing, and removing silicon to obtain a wafer level glass micro-cavity; (4) sputtering a metal layer on the silicon wafer, and preparing a metal lead through photolithography, so as to obtain a lead substrate, wherein the position of the metal lead corresponds to the position of the micro-channel of the glass micro-cavity; (5) mounting an LED chip on the lead substrate, and leading; (6) bonding the wafer level glass micro-cavity with the substrate to form a bonded wafer; and (7) filling the gap between the LED chip and the wafer level glass micro-cavity with silicone through the glass micro-channel. According to the invention, the light emitting efficiency is high, and a packaged glass lens realizes beam collimation.

The invention discloses a resistive random access memory unit and a resistive random access memory. The resistive random access memory unit comprises a resistive random access memory and a double-state resistor, wherein the resistive random access memory and the double-state resistor are connected in series. A positive electrode and a negative electrode of the double-state resistor all can provide large working currents and thus a leakage passage in an intersection array is reduced so that read crosstalk is eliminated.

The invention discloses a method and device for preparing metal powder in an electro-deposition manner, and belongs to the field of an electrochemical technology and equipment. According to the method and device, electrolyte is electrolyzed by adopting graphite felt or carbon felt as anode materials; and the form and the size of the metal powder deposited at cathodes can be adjusted by adjusting working currents. According to the method and device for preparing metal powder in an electro-deposition manner, the graphite felt or the carbon felt, which has an extremely large specific surface area, is adopted as an anode, so that the anode can obtain great working currents under the condition that the electric current density is extremely small, and phenomena of"air curtain" and electrolytic corrosion of conventional dense anode materials can be avoided; and besides, the graphite felt or the carbon felt is easy to cut and can be spliced, so that the anode is extremely convenient to make; additionally, the electric current density of the cathode is increased, so that a cathode product is changed from compact into loose, the shape of the cathode product is changed from blocks or tablets into particles or powder, and in terms of form, the cathode product is changed from big to small, and a metal powder collecting mechanism is facilitated to continuously and automatically collect cathode metal powder.

A detection circuit is mounted on an electronic device having a communication function, including at least a battery, a CPU, and a communication unit, and is configured to detect the remaining battery charge. An A/D converter performs sampling of a magnitude of a current I_BAT discharged from the battery, and converts the current I_BAT thus sampled into a digital current value. An interface circuit receives, from the CPU, control data which indicates a period in which there is an increase in the current discharged from the battery. Based upon the control data, a control unit raises the sampling frequency of the A/D converter in the period in which there is an increase in the current I_BAT.

A heat-tube type transformer bushing comprises a conduction tube 1, a radiator 4, a main insulating layer 7, an insulating external bushing 3 and a connection flange 6. The conduction tube 1 is a hollow metal tube, one end of which is connected with the radiator 4, the other end of which is connected with a connecting terminal 11. Non-combustible environment protection type cooling fluid 2 is filled in the conduction tube 1. The radiator 4 is a hollow metal cavity, the cavity internal is connected with the internal cavity of the conduction tube to form an enclosed cavity. The main insulating layer 7 winds the external of the conduction tube 1, the insulating external bushing 3 and the connection flange 6 are bushed in the outside of the main insulating layer 7. The invention has advantages of no combustion and explosion hidden troubles, low temperature rise, small volume and light weight.

The invention provides a method and a device for preventing ice coating in an electric transmission line. The method comprises the following steps: determining the critical non-ice-coating current ofan ice coating line; increasing the working current of the ice coating line by network reconstruction, reactive compensation and/or active pressure regulation sequentially and enabling the working current to be greater than the critical non-ice-coating current. The invention balances heat required by the ice coating of the line by enhancing the working current of the line through the heat of linepower loss generated by the working current, thereby destroying a formation condition of the ice coating and preventing the formation of the ice coating of the line. The invention also provides the device for preventing the ice coating in the electric transmission line. Before ice coating, the invention carries out defence and avoids the formation of the ice coating, thereby the large input of manpower and material resources after ice coating can be avoided, the cost is low, and the economic benefit is good; moreover, the invention can prevent ice coating without interrupting the operation ofthe electric transmission line, thereby the normal operation of the industrial and agricultural production can be ensured.

The invention provides an automobile window motor control method and system and an automobile. The current environment temperature value is obtained, and whether the current environment temperature value is lower than a preset temperature threshold value or not is judged; and when it is judged that the current environment temperature value is lower than the preset temperature threshold value, a driving circuit is controlled to increase a driving current so as to increase a working current of an automobile window motor. By increasing the driving current, the output power of the automobile window motor is increased correspondingly to enough drive an automobile window to overcome operation resistance, so that clamping is avoided, the situation that clamping of the automobile window causes rotating blocking of the automobile window motor, so that the current in the circuit is increased rapidly to reach the rotating blocking threshold value of the automobile window motor is further avoided, and namely, smooth opening or closing of the automobile window in a cold environment can be achieved.

The invention, which relates to the technical field of field emission, provides a carbon-nano-field emission cathode and a manufacturing method and application. The carbon-nano-field emission cathodecomprises a substrate, a graphene layer horizontally coated on the substrate, and a carbon nanotube array arranged on the graphene layer. Roots of all carbon nanotubes in the carbon nanotube array arein covalent linkage with the graphene layer. According to the invention, because the roots of all carbon nanotubes are in covalent linkage with the graphene layer, the interface resistance is extremely low and thus the carbon nanostructure has excellent conductivity, so that the opening electric field of the cathode is reduced obviously; the heat generated during the field emission process is lowand thus the cathode can be emitted stably at the high current, so that the operating current of the cathode is improved substantially. Moreover, because the three-dimensional covalent structure hasexcellent thermal conductivity, the emission stability of the cathode is improved.

The invention discloses an intelligent guarantee method for an optical module in a high temperature environment. The method comprises the following steps of: setting the highest set temperature for the optical module; when the optical module works in the high temperature environment, tracking and sampling the working temperature and the working current of the optical module; when the working temperature of the optical module exceeds the highest set temperature, stopping increasing the working current of a laser, so that the working temperature of the optical module does not increase any longer; setting the maximum current value for the working current of the laser; and when the working current of the laser exceeds the maximum current value, revising the working current of the laser into the maximum current value, so as to protect the optical module at high temperature.

A semiconductor integrated circuit device provided with a memory circuit having a word line selection circuit with reduced leakage current is provided. The memory circuit includes: second word lines with which memory cells are connected; multiple bit lines that are extended in a direction orthogonal thereto and electrically connected with memory cells corresponding to selected second word lines of a plurality of the second word lines; and word drivers, constructed of CMOS inverter circuits, that select or deselect the second word lines. The sources of p-channel MOSFETs that constitute a plurality of word drivers including second word lines corresponding to selected bit lines are supplied with a voltage at a level at which second word lines are selected. The sources of the p-channel MOSFETs of the other word drivers are supplied with a voltage corresponding to a level at which second word lines are deselected.

The invention discloses a microstrip line slow-wave structure and belongs to the technical field of microwave vacuum electrons and relates to an O-shaped electron vacuum device. The microstrip line slow-wave structure comprises a microsrip transmission line structure which is formed by a metal microstrip line (1), a medium substrate (2) and a metal base plate (3), wherein the metal microstrip line (1) is of a periodic structure which is formed by a plurality of O-shaped metal microstrip line units, the O-shaped metal microstrip line units are in end-to-end connection, each O-shaped metal microstrip line unit is composed of an ellipse opening ring microstrip line and two microstrip lines, and the two microstrip lines are respectively connected with two ends of an opening of the ellipse opening ring microstrip line respectively. Compared with a traditional N-shaped microstrip line slow-wave structure, the microstrip line slow-wave structure has higher coupling impedance and lower working voltages under the size of the same devices, and comprehensive requirements for the aspects such as output power, the working voltages and weight of a traveling-wave tube can be further met.

A LDMOS transistor and a formation method thereof are provided; the method comprises the following steps: providing a semiconductor substrate, and forming a shallow trench isolation structure in the semiconductor substrate; forming a drift region in the semiconductor substrate, wherein the drift region encloses the shallow trench isolation structure; forming a body region in the semiconductor substrate on the drift region side; forming a gate structure crossing and covering partial the body region, the drift region and the shallow trench isolation structure; forming a drain region in the driftregion on the gate structure side; forming a source region in the body region on the other side of the gate structure; forming a first shallow doping region in the drain region on the gate structureside and in the drift region on the gate structure bottom, wherein the first shallow doping region doping type is same with the drain region doping type, and the first shallow doping region depth is smaller than the drain region depth and drift region depth. The method can improve the LDMOS transistor working current.