62results about How to "Eliminate pressure drop" patented technology

The present invention generally relates to power electronic switching circuits and in particular to inverter modules employing two or more controlled switches that can be used with reactive loads. An inverter circuit is provided which comprises first and second input terminals for being connected to a DC power source; first and second output terminals for outputting an AC voltage; at least one metal oxide semiconductor field effect transistor, MOSFET, having a parasitic body diode. The inverter circuit further comprises at least one disabling element for disabling said body diode. This may result in an improved efficiency of the inverter circuit in combination with a reactive power capability. Further, a semiconductor switching device is disclosed, comprising at least one metal oxide semiconductor field effect transistor, MOSFET, and at least one insulated gate bipolar transistor, IGBT, wherein said MOSFET and said IGBT are connected in parallel.

According to the present invention there is provided an outdoors self sufficient luminaire, weatherproof, characterized in that within the outer body are integrally housed: an array of solid state light emitting individually angle adjustable devices, a device for collecting and converting solar radiation into electrical energy, an electronic circuitry that administers the said generated electrical energy to replenish the power consumed from an accumulator during the absence of the said radiating source, an electronic circuitry that administer and control the levels of power necessary to excite individually the solid state light emitting devices in a programmable fashion, a structural integrated means for attaching the luminaire into a plurality of masts, and means for maintaining the temperature around the array of solid state light emitting devices within a predetermined range.

Disclosed is a low-cost hybrid storage solution that allows Code like sector-alterable NOR and Data like block-alterable NAND and byte-alterable EEPROM being integrated on a same die. The disclosed combo NVM design of the present invention is a truly Data-oriented NVM design that allows 2T-EEPROM to integrate both 0.5T-NAND and 1T-NOR without sacrificing any EEPROM's byte-write performance in the same die. The invention provides several new embodiment sets of preferable bias conditions of Program, Program-Inhibit, Erase and Erase-Inhibit for operating bit-write, byte-write, sector-write and page-write for several preferable Flotox-based EEPROM, NOR and NAND or combo NVM arrays that include types of shared SL, 8-pair BLs and SLS, with or without GBL, normally Erased Vt and Programmed Vt, or the reversed Erased-Vt or Programmed-Vt, etc. Further disclosed is a flexible X-decoder design to allow the flexible selection of pages to be erased to save erase time. Also disclosed is using on-chip negative voltage for FT's gate along with the less positive HV applied to FTs' channel region for same write performance but with the benefits of channel length reduction in cell and less BVDS electric requirement in peripheral devices for more scalable manufacturing process.

A system and method for automatic correction of voltage drop, also known as IR Drop violations of a mask layout block, maintaining the process design rules (DRC Clean) and layout connectivity (LVS Clean) correctness, are disclosed. The method includes analyzing polygons or signals for voltage drop violations, in a mask layout block and obtaining one or more voltage drop restriction information associated with polygons or signals from a technology and an external constraints file. The system automatically corrects all voltage drop violations if found, changing polygons space, width and length, maintaining the process design rules (DRC Clean) and layout connectivity (LVS Clean) correctness. The method also includes analysis and automatic correction of contacts and VIA's according to amount and location in order to comply with voltage drop requirements as taken from technology or external constraints file. The method provides a violation marker associated with position of polygons or signals that graphically represents a width, space, length violation. The method and system works on GDSII format files and on industry standards layout editor's database.

A step-up switching voltage regulator includes two or more inductors and a switching network. A control circuit drives the switching network in a repeating sequence that includes: a magnetizing phase where the inductors are connected in series between an input voltage and ground; and a charge transfer phase where the inductors are connected in parallel to provide current to an output node with at least one of the inductors is connected between ground and the output node.

A flat panel display device includes a first substrate and a second substrate disposed to oppose each other with a predetermined gap therebetween. An electrode made of a transparent conductive oxide film is formed on at least one of the first substrate and the second substrate. A sealing member is disposed between the first substrate and the second substrate and bonds the first substrate and the second substrate to each other. An electrode protecting layer is formed on a portion of the electrode overlapping with the sealing member and between the sealing member and the electrode.

The semiconductor booster circuit includes a plurality of stages, each of which has a MOS transistor and two capacitors. The MOS transistor, having a drain, a source and a gate, is formed in a well of a substrate portion. One capacitor has a terminal connected to the drain of the MOS transistor, while the other capacitor has a terminal connected to the gate of the MOS transistor. A first clock signal generating means generate a first clock signal via another terminal of one capacitor. A second clock signal generating mean s generate a second clock signal, with a larger amplitude than a power supply voltage, via another terminal of another capacitor. The plurality of stages are cascaded together, and in each of the stages the source of the MOS transistor is electrically connected to the well in which the transistor is formed, while the wells are electrically insulated from each other.

A semiconductor booster circuit includes: a plurality of stages, each having a first MOS transistor and a first capacitor having one terminal connected to a drain terminal of the first MOS transistor, the stages being connected in series by connecting the first MOS transistors of the stages in cascade; and at least one of a first arrangement wherein a source terminal of the first MOS transistor of each of the stages is electrically connected to its substrate, and the substrates of the first MOS transistors in the plurality of stages are electrically insulated from one another, and a second arrangement wherein one terminal of a second capacitor is connected to a gate terminal of the first MOS transistor of each of the stages, and a first clock signal generating unit for inputting a first clock signal to the other terminal of the first capacitor in each stage and a second clock signal generating unit for inputting a second clock signal having a larger amplitude than a power supply voltage (Vdd) to the other terminal of the second capacitor, in each stage are provided.

A method of control of the current and voltage switching trajectories of insulated gate power semiconductor switches, more specifically MOSFETs and insulated gate bipolar transistor devices (IGBTs), is disclosed. MOSFETs and IGBTs are used in switch mode power supplies because of their easy driving ability and their ability to handle high currents and voltages at high-switching frequencies. However, the switching trajectories for both types of devices are responsible for both common-mode electromagnetic emissions generated by the drain current waveform and power losses in the commutation cell. These two characteristics represent opposing design objectives for power converters. The current invention uses a hybrid voltage / current gate signal source with feedback of the gate charge (or discharge) current to dynamically and independently control the drain current and drain voltage of an insulated semiconductor device. The rate of change of drain current is controlled by the voltage source traversing the transconductance curve while the rate of change of the drain voltage is controlled by dynamic variations in the current source due to feedback.

The invention provides a battery power display control method and a battery power display control circuit. The control method comprises the steps of acquiring the working voltage under the condition of battery charge and discharge, acquiring the average charge and discharge current under the condition of battery charge and discharge, acquiring the voltage drop generated by the average charge and discharge current on a compensation resistor to form a compensation voltage, superposing the compensation voltage and the working voltage to obtain an open-circuit voltage representing the current battery power, comparing the open-circuit voltage with at least two preset voltage benchmarks to obtain the current level of battery power and form a display signal, and displaying the current level of battery power according to the display signal.

A UPS system and mechanical switching arrangement therefor that is driven by an electromechanical actuator when a fault condition is detected thereby opening or closing a switch of the switching arrangement in response thereto within 8 milliseconds, preferably within 4 milliseconds, and more preferably within 2 milliseconds of a fault condition being detected. The UPS system has one switching arrangement for controlling current flow through a utility power path that is switched by an electromechanical actuator and another switching arrangement for controlling that is switched by an electromechanical actuator through an inverter power path that supplies an output-connected load with electrical power should a fault condition occur. The switching arrangements can be driven by a common electromechanical actuator or independent driven by separate electromechanical actuators enabling programmability of a plurality of different UPS system operating modes.

A centrifugal rotor includes a hub (10) having a longitudinal axis (8), a fluid inlet (20), a first flange referred to as upstream flange (12) and having an opening (22) around the hub (10), a second flange referred to as downstream flange (14) separated from the first flange by blades (16) thus forming ducts each delimited by the first flange (12), the second flange (14) and two blades (16) and extending from the fluid inlet (20) to a peripheral outlet (26), near the peripheral outlet (26) the first flange (12) having a concave zone (32) facing towards the ducts whereas the second flange (14) has a convex zone (34) facing towards the ducts.

The invention relates to a tangential gas intake desulfurization tower of flue gas desulfurization technology of a semi-dry circulating fluidized bed. The tower is characterized in that: a flue gas intake structure is tangentially connected with the desulfurization tower, a desulfurizer inlet is positioned at the central position of the bottom of the desulfurization tower, a feed back inlet is positioned at the lower part of the desulfurization tower and a flue gas outlet is positioned at the top of the desulfurization tower. The tangential gas intake desulfurization tower has the advantages of causing the flue gas to form strong rotating flow in the desulfurization tower, improving turbulent intensity of gas flow, maintaining full contact between a desulfurizer and the flue gas, and intensifying desulfurization reaction process and greatly improving the utilization ratio of the desulfurizer; and the tangential flue gas intake structure can help effectively lower pressure drop of the system.

The invention discloses a laser voice restoration method and circuit based on a PSD. The laser voice restoration method based on the PSD comprises the design of a PSD photovoltaic conversion circuit module; the design of a current pressure converting circuit module and the design of a differential amplification circuit module. The laser voice restoration circuit based on the PSD comprises the PSD photovoltaic conversion circuit module which is used for indirectly obtaining a relative value of a vibration amplitude of glass and generating current signals with strength changing; the current pressure converting circuit module which is used for respectively converting current pressure of two-way weak current signals output by the PSD photovoltaic conversion circuit module and is connected with the PSD photovoltaic conversion circuit module; and the differential amplification circuit module which is used for carrying out simultaneous difference and main amplification and filtering of two-way signals, is connected with the current pressure converting circuit module and enables a signal amplitude to reach about 3 V to facilitate the collection of rear-end signals and the restoration of laser voice signals. According to the laser voice restoration method and circuit based on the PSD, an RC (resistor-capacitor) network is used in combination with an AD 704 to achieve the filtering of the signals through the current pressure converting circuit module; so that the signal quality is improved; and the AD 8274 is utilized to complete the differential amplification of two-way voltage signals.

An output stage circuit of a data driver for an display is provided. The circuit includes a current mirror having a first transistor and a current source on a reference current path, having a second transistor on an output current path, wherein the reference and output current paths are commonly coupled to a power line, a capacitor having a first end coupled to the power line and a second end coupled to a gate of the second transistor, a first switch cutting off the output current path during a first period, and a second switch coupling the second end of the capacitor to the current source during the first period.

A method of storing information in a cross-point magnetic memory array and a cross-point magnetic memory device structure. The voltage drop across magnetic tunnel junctions (MTJ's) during a write operation is minimized to prevent damage to the MTJ's of the array. The voltage drop across the selected MTJ's, the unselected MTJ's, or both, is minimized during a write operation, reducing stress across the MTJ's, decreasing leakage currents, decreasing power consumption and increasing the write margin.

The invention is concerned with the in-place digitization equipment of simulation quantity instrument transformer. It consists of: N transducer with small size, N signal collecting board and the power supply. The numeric area of N is the positive integer from 1 to 6; the connection of each part is: each inputting end of the small transducer connects with one outputting end of the traditional electromagnetism instrument transformer, each outputting end of the small transducer connects with the signal collecting board and forms the signal processing unit, N signal processing units connects with the power supply. The equipment solves the magnetic saturation problem of the traditional high voltage instrument transformer; the invention is with high accuracy in computation; convenient maintenance and operation; capability of working under long shift, stable and low cost.

The invention relates to a rock sample coring device. The rock sample coring device comprises a containing barrel for containing a rock sample, and coring equipment which is connected with the containing barrel and can stretch into the containing barrel, wherein the coring equipment can core the rock sample in the sample containing barrel. By using the coring device, the rock sample for more precisely estimating the content of natural gas can be provided.

An embodiment of the present invention provides a power supply circuit including a charge-pumping booster section which uses switching elements provided only by N-channel transistors yet does not have a problem of voltage drop by threshold value. When a boosted voltage is obtained at a first terminal of a first capacitor in a booster section, a booster control section supplies this boosted voltage to a third capacitor, to boost the voltage further thereby turning ON a first transistor. When a boosted voltage is obtained at a first terminal of a second capacitor in the booster section, the booster control section supplies this boosted voltage to a fourth capacitor, to boost the voltage further thereby turning ON a second transistor. This arrangement eliminates a problem of voltage drop by threshold value in the first and the second transistors which serve as output-side switching elements.

The invention discloses a gas-liquid distributor, which comprises a cover plate and a central tube. The central tube is arranged vertically, the cover plate is horizontally disposed above the central tube, the central tube comprises an inlet part and a liquid drop part, the liquid drop part is below the inlet part, the lower end of the central tube is a central tube outlet, inclined cutting is conducted on the central tube top, a space formed between an inclined incision generated by inclined cutting of the central tube top and the cover plate is the inlet part, multiple rows of metal strip-type screens are distributed along the axial direction of the central tube on the liquid drop part, and a jet mixing device is disposed below the central tube outlet. The gas-liquid distributor provided by the invention is mainly used for a fixed-bed hydrogenation reactor in petroleum refining and chemical industry. The gas-liquid distributor provided by the invention can distribute gas-liquid raw materials evenly on a catalyst bed in the fixed-bed hydrogenation reactor to make the raw materials in full contact with a catalyst so as to lower the temperature difference with a cross section of the catalyst bed, thereby enhancing the oil product quality and lowering the production cost.

The invention provides a battery electric quantity indication setting method and circuit. The setting method includes acquiring open circuit voltage of a battery used for indicating current electric quantity of the battery; acquiring current battery electric quantity level and outputting a display signal through comparing the acquired open circuit voltage with at least two predetermined battery voltage comparison reference values; and displaying current battery electric quantity level according to the display signal.

The invention provides an OLED display panel and a manufacturing method thereof. The display panel comprises the following parts of a substrate comprising a color film layer and a first transparent conductive layer, wherein the first transparent conductive layer comprises a first region and a second region, the first region corresponds to a region forming the color film layer, and the second region corresponds to a region forming a gate stack layer; a buffer layer covering the first transparent conductive layer; an active area comprising a first active area and a second active area, wherein the first active area is located above the first region, and the second active area is located above the second region; a gate stack layer located above the second active area; an interlayer dielectriclayer, a second transparent conductive layer, a planarization layer, a color film layer, a second buffer layer, an anode, a pixel defining layer and a light emitting structure.

The embodiment of the invention discloses a lithium battery charging protection circuit and a lithium battery. The lithium battery charging protection circuit comprises an over-discharge voltage detection circuit, a charging detection circuit, a logic circuit, a driving circuit, a first transistor and a state switching circuit. The over-discharge voltage detection circuit is used for generating an over-discharge voltage control signal according to the magnitude relationship between an over-discharge detection voltage and a reference voltage; the charging detection circuit is used for generating a first control signal according to the second power supply voltage; the logic circuit is used for generating a second control signal according to the over-discharge voltage control signal and the first control signal; and the driving circuit generates a gate control signal according to the second control signal so as to drive the first transistor to be turned on or turned off. According to the technical scheme provided by the embodiment of the invention, when the over-discharge detection voltage of the lithium battery is reduced to be lower than the over-discharge voltage value for charging, the voltage drop at the two ends of the first transistor during charging can be eliminated through the charging detection circuit, and a phenomenon that a chip is overheated due to the voltage drop of the diode is avoided.

A control circuit for current detection is disclosed. The control circuit outputting an output current to a power device comprises at least one first Field Effect Transistor (FET) coupled to the positive input terminal of an operational amplifier. The first FET is coupled to the power device through two voltage terminals, wherein the output current is passed through the first FET. The control circuit further comprises at least one second FET coupled to the first FET and the negative input terminal of the first operational amplifier, utilizing the virtual-short characteristic of the first operational amplifier to form a current mirror with the first FET, and copying the output current to generate a copy current by a scale whereby the output current is detected by the copy current. The invention detects the output current without consuming additional power so as to measure the power consumption for the power device.

An embodiment of the present invention provides a power supply circuit including a charge-pumping booster section which uses switching elements provided only by N-channel transistors yet does not have a problem of voltage drop by threshold value. When a boosted voltage is obtained at a first terminal of a first capacitor in a booster section, a booster control section supplies this boosted voltage to a third capacitor, to boost the voltage further thereby turning ON a first transistor. When a boosted voltage is obtained at a first terminal of a second capacitor in the booster section, the booster control section supplies this boosted voltage to a fourth capacitor, to boost the voltage further thereby turning ON a second transistor. This arrangement eliminates a problem of voltage drop by threshold value in the first and the second transistors which serve as output-side switching elements.

The present disclosure relates to an organic diode display driving circuit, a display panel, and an electronic device. The driving circuit includes a voltage source, a display-area circuit, and an auxiliary-area circuit being arranged outside a display area. The display-area circuit and the auxiliary-area circuit include power-supply wirings, signal wirings, and at least one pixel, and the voltage source connects to the pixel within the display area via the power-supply wirings. The voltage source further directly or indirectly connects to the pixel within the display area via the wirings in an auxiliary area. By configuring the wirings in the auxiliary area to connect to the voltage line, the resistance of the power-supply wirings in the display area may be reduced so as to eliminate the voltage drop of the power-supply wirings in the display area.

A step-up switching voltage regulator includes two or more inductors and a switching network. A control circuit drives the switching network in a repeating sequence that includes: a magnetizing phase where the inductors are connected in series between an input voltage and ground; and a charge transfer phase where the inductors are connected in parallel to provide current to an output node with at least one of the inductors is connected between ground and the output node.