144results about How to "Increase the voltage value" patented technology

A semiconductor chip is mounted on a heat sink disposed inside a through-hole of a wiring board, electrodes of the semiconductor chip and connecting terminals of the wiring board are connected by bonding wires, a sealing resin is formed to cover the semiconductor chip and the bonding wires, and solder balls are formed on the lower surface of the wiring board, thereby constituting the semiconductor device. The heat sink is thicker than the wiring board. The heat sink has a protruded portion protruding to outside from the side surface of the heat sink, the protruded portion is located on the upper surface of the wiring board outside the through-hole, and the lower surface of the protruded portion contacts to the upper surface of the wiring board. When the semiconductor device is manufactured, the heat sink is inserted from the upper surface side of the wiring board.

An apparatus and method is disclosed for improving timing margins of logic paths on a semiconductor chip. Typical logic embodiments, such as CMOS (Complementary Metal Oxide Semiconductor), have path delays that become shorter as supply voltage is increased. Embodiments of the present invention store product data on each particular chip. The product data includes, for examples, but not limited to, a voltage range having a low limit voltage and a high limit voltage, a limit temperature, and performance of the particular chip in storage for the particular chip. Each chip has a voltage controller, a timer, and a thermal monitor. The voltage controller communicates with a voltage regulator and dynamically causes a voltage supply coupled to the chip to be as high as possible in the voltage range, subject to the limit temperature.

It is an object to provide a photoelectric conversion device which detects light ranging from weak light to strong light. The present invention relates to a photoelectric conversion device having a photodiode having a photoelectric conversion layer, an amplifier circuit including a thin film transistor and a bias switching means, where a bias which is connected to the photodiode and the amplifier circuit is switched by the bias switching means when intensity of incident light exceeds predetermined intensity, and accordingly, light which is less than the predetermined intensity is detected by the photodiode and light which is more than the predetermined intensity is detected by the thin film transistor of the amplifier circuit. By the present invention, light ranging from weak light to strong light can be detected.

The invention relates to an oil abrasive particle detecting sensor and a design method thereof. The design method comprises, after a sensor framework is determined, calculating the relation curve between magnetic field intensity B and number of coil turns n by formula, take the n, which corresponds to the maximum value of the B, as the number of turns of an induction coil and two exciting coils. According to the oil abrasive particle detecting sensor, the number of coils of every coil is determined according to the design method; the output end of the induction coil is connected with a modulation and demodulation circuit, which is sequentially connected with a pre-amplification circuit, a low-pass filter, a high-pass filter and an oscilloscope. For signal output components, the oil abrasive particle detecting sensor provides the modulation and demodulation circuit comprising the pre-amplification circuit, the low-pass filter and the high-pass filter. The design method of the oil abrasive particle detecting sensor helps design the number of turns of the induction coil, which can maximize signal output amplitude, and under the dimension of the mass-produced sensor framework, the induction coil can be conveniently mounted on various oil-lubricated engines. The oil abrasive particle detecting sensor can accurately obtain abrasive particle associated information and be applied to measuring metal abrasive particles only with a diameter of 500 mu m.

A semiconductor chip is mounted on a heat sink disposed inside a through-hole of a wiring board, electrodes of the semiconductor chip and connecting terminals of the wiring board are connected by bonding wires, a sealing resin is formed to cover the semiconductor chip and the bonding wires, and solder balls are formed on the lower surface of the wiring board, thereby constituting the semiconductor device. The heat sink is thicker than the wiring board. The heat sink has a protruded portion protruding to outside from the side surface of the heat sink, the protruded portion is located on the upper surface of the wiring board outside the through-hole, and the lower surface of the protruded portion contacts to the upper surface of the wiring board. When the semiconductor device is manufactured, the heat sink is inserted from the upper surface side of the wiring board.

A control method and apparatus are provided to convert a DC voltage into alternating voltage. The apparatus includes a first inverter and a second inverter to generate a first alternating voltage and a second alternating voltage, respectively. Also included is an interphase transformer to combine these alternating voltages in parallel to obtain a first resulting alternating voltage. The apparatus also includes a third inverter and a fourth inverter to generate a third and fourth alternating voltage, respectively. These are combined to form a second resulting alternating voltage. The second resulting alternating voltage is displaced in phase approximately 180° in relation to the first resulting alternating voltage.

Apparatus for an electrically programmable and erasable memory device and methods for programming, erasing and reading the device. The device has a single transistor including a source, a drain, a control gate and a floating gate positioned between the control gate, the source and the drain, where the floating gate is capacitively coupled to the drain. At least one part of the floating gate is partly positioned between the control gate, the drain and the source, and the other part of the floating gate overlaps with the drain. Further, the single transistor of the device includes means for injecting hot electrons generated by the drain induced secondary impact ionization onto the floating gate. Additionally, the means are arranged to induce Fowler-Nordheim tunnelling of charges from the floating gate to the drain.

The invention discloses a band-gap reference voltage circuit. A current source is additionally arranged, a reference voltage output end and a power source end are arranged, density of current flowing through a second triode is n times of the density of current flowing through a first triode in a micro current source unit, a power supply end of a difference amplifier unit is connected with the power source end, a collector of a third triode is connected with the power source end through the current source, an emitting electrode of the third triode is connected with an input end of the micro current source unit, the collector of the third triode is connected with an output end of the difference amplifier, and a connecting point and a base electrode of the third triode are both connected to a reference standard output end. As an implementation mode of the micro current source unit, resistance value of a third resistor is n times of that of a second resistor, and the first triode is symmetrically matched with the second triode. The band-gap reference voltage circuit is high in accuracy, low in power source noise, small in temperature coefficient, low in power, capable of directly generating reference voltage over 1.25V, needless of being connected with a peripheral resistor for working and suitable for generating reference voltage inside a chip.

The present invention relates to method and apparatus for preparing thin films of semiconductor films for radiation detector and photovoltaic applications. In one aspect, the present invention is directed to a method of forming a Cu(In,Ga)(S,Se)2 layer with substantially uniform Ga distribution. In a particular aspect, the method includes depositing a precursor film on the base, the precursor film including Cu, In and Ga, sulfurizing the precursor film thus forming a sulfurized precursor layer with a substantially uniform Ga distribution, and selenizing the sulfurized precursor layer to reduce the sulfur concentration therein and obtain the Cu(In,Ga)(S,Se)2 layer with substantially uniform Ga distribution. In a further aspect, the method also includes the step of selenizing the precursor film.

A display device includes a plurality of pixel each including a transistor, a pixel electrode connected to the transistor, and a reference electrode disposed so as to be opposite to the pixel electrode. The display device also includes data lines connected to the corresponding pixel circuits, a plurality of gate lines connected to the corresponding pixel circuits, gate circuits each of which sequentially outputs a gate signal, which is in a high voltage level during two or more horizontal periods in a first order or in a second order that is reverse to the first order, and a gate signal control circuit that controls each of the gate circuits and scans the gate lines. The gate signal control circuit controls each of the gate circuits to start to output the gate signals so as not to overlap periods when the gate signals are output to the adjacent gate lines.

The invention relates to the technical field of flexible direct-current power transmission, particularly to a method for increasing the capacity of a flexible direct-current power transmission system and an apparatus thereof. According to the invention, by adding a full-bridge sub-module (FBSM) which can generate negative voltage into a bridge arm of a modular multilevel converter (MMC), direct-current output voltage of a transverter is balanced while alternating-current output voltage of the transverter is adjusted, thereby increasing the transmission capacity of the transverter. The method does not have higher requirements on the through-current capability of IGBT elements and proceeding from conventional engineering technologies, the application of flexible direct-current power transmission technologies in practical engineering is substantially optimized.

The invention relates to an electric heat mat controller, which adopts the conductive resistor whose resistance value changes followed by the temperature as a heating wire for a temperature controller. Therefore, the invention can regulate the resistance value in direct proportion with the temperature so as to accurately control the temperature of the electric heat mat. The temperature controller further comprises a temperature compensating unit, a positive feedback circuit unit, a safety protective circuit unit and an error correction unit. The temperature measured by the temperature measuring unit is compensated so as to measure the heating temperature of the Thermal sensitive wire errorlessly. In addition, a temperature comparing unit can stably output control signal. When the heater and sensor are short-circuiting and the sensor senses the adequate industrial electricity, a high level measuring voltage is supplied to a temperature comparing unit so as to switch the output device to the closing status and cut off the heating electrical source to the heater. Further, the error generated by the member connecting with the sensor or temperature setting unit is eliminated manually.

A low noise amplifier is disclosed. The low noise amplifier comprises a current mirror circuit, a bias circuit, a cascode amplifying circuit and a power gain compensating circuit. The current mirror circuit is used for providing a first current and third current. The bias circuit is used for receiving a first current and third current and outputting a first bias voltage and a second bias voltage according to the first current and third current. The cascode amplifying circuit respectively receives the first bias voltage and the second bias voltage, and accordingly to work at an operation bias point. The power gain compensating circuit is used for receiving a RF output signal and accordingly outputs a gain compensating signal to the current mirror circuit so as to dynamically adjust current value of the first current and third current and further to compensates power gain of the low noise amplifier in order to increase 1 dB gain compression point (P1dB).

The invention provides a drive circuit applicable to a piezoelectric actuating pump. The piezoelectric actuating pump is provided with a piezoelectric actuator. The drive circuit is provided with a boosted circuit unit and a boosted propelling integrated circuit. The boosted circuit unit at least comprises a plurality of capacitors, a plurality of resistors and a boosted integrated circuit chip which is connected with the plurality of capacitors and the plurality of resistors. The boosted propelling integrated circuit is used for boosting voltage values of input voltage and converting polarity of the input voltage. Therefore, the output voltage is produced to drive the piezoelectric actuator so as to convert electric energy to mechanical energy.

A driving stage for a phase change non-volatile memory device may have an output driving unit which supplies an output driving current during an operation of programming of at least one memory cell. A driving-control unit receives an input current and generates at output a first control signal that controls supply of the output driving current by the output driving unit in such a way that a value of this current has a desired relation with the input current. A level-shifter element, set between the output of the driving-control unit and a control input of the output driving unit, determines a level shift of the voltage of the first control signal so as to supply to the control input of the output driving unit a second control signal, having a voltage value that is increased with respect to, and is a function of, the first control signal.

A power supply apparatus is provided. The power supply apparatus includes a first power pin, a second power pin, a DC output regulator, a current sensing circuit, and a compensation circuit. The first and second power pins are coupled to an external load through a first wire and a second wire respectively. The DC output regulator receives an input voltage and a feedback voltage and generates an output voltage and an output current. The current sensing circuit senses the output current and generates a sensing voltage. The compensation circuit generates a compensation voltage responding to the sensing voltage. The compensation voltage is a sum of a voltage drop on the first wire and a voltage drop on the second wire. The compensation circuit compensates the output voltage according to the compensation voltage, such that a load voltage of the external load is kept at a stable voltage value.

An electricity storage system includes an electricity storage device, a positive electrode line, a negative electrode line, a capacitor, at least two diodes, and a first intermediate line. The electricity storage device is able to supply power to a load. The electricity storage device includes at least two electricity storage groups connected in series. The electricity storage group includes at least two electricity storage elements connected in series. Each electricity storage element includes a current breaker. The capacitor is connected to the positive and negative electrode lines. At least two diodes are connected in series between the positive electrode line and the negative electrode line and are respectively connected in parallel to the electricity storage groups. The first intermediate line is connected between a first connection point at which the electricity storage groups are connected together and a second connection point at which the diodes are connected together.

An apparatus and method is disclosed for improving timing margins of logic paths on a semiconductor chip. Typical logic embodiments, such as CMOS (Complementary Metal Oxide Semiconductor), have path delays that become shorter as supply voltage is increased. Embodiments of the present invention store product data on each particular chip. The product data includes, for examples, but not limited to, a voltage range having a low limit voltage and a high limit voltage, a limit temperature, and performance of the particular chip in storage for the particular chip. Each chip has a voltage controller, a timer, and a thermal monitor. The voltage controller communicates with a voltage regulator and dynamically causes a voltage supply coupled to the chip to be as high as possible in the voltage range, subject to the limit temperature.

A DC / DC converter is able to step down a voltage value of a high-voltage battery, and is able to step up a voltage value of a low-voltage battery. The low-voltage battery is a battery that provides a lower voltage value than the high-voltage battery. The DC / DC converter includes a transformer, a third diode and a reactor. The transformer includes a first coil and a second coil. The first coil is connected to the low-voltage battery. The second coil is connected to the high-voltage battery. An anode of the third diode is connected to one end of the first coil. One end of the reactor is connected to a cathode of the third diode, and the other end of the reactor is connected to a positive electrode terminal of the low-voltage battery.

A computer fan control circuit which comprises a control chip, an integral circuit, a switch unit, a current control circuit, a feedback circuit and a first power source. The switch unit comprises a first end, a second end and a third end. The current control circuit comprises a current-limiting resistor and a current controller. The current controller comprises a first control end, a second control end and a third control end. The feedback circuit comprises a first feedback resistor. The control chip generates a first pulse width modulation signal. The input end of the integral circuit receives the first pulse width modulation signal. The output end of the integral circuit is connected with the first end of the switch unit. The second end of the switch unit is grounded through the first feedback circuit. The third end of the switch unit is connected with the first control end through the current-limiting resistor. The second control end is connected with the first power source. The third control end is connected with a power source pin of a fan connector. When the difference between the voltage of the first end and the voltage of the second end is smaller than a first threshold value, the switch unit is turned off, and the computer fan control circuit adjusts the rotating speed of the fan by changing the duty ratio of the first pulse width modulation signal.

An electronic ballast comprises an input filter, a DC-DC flyback converter and a DC-AC full-bridge inverter circuit which are connected in turn in a cascade manner, wherein the front end of the input filter is connected with an accumulator battery, a sustained arc circuit and a multivoltage parallel structure firing circuit are in parallel connection on the DC-AC full-bridge inverter circuit; the multivoltage parallel structure firing circuit comprises a multivoltage circuit, a booster circuit, a high voltage barrier diode and a relay; the output end of the multivoltage circuit is connected with the sustained arc circuit and the booster circuit; and the booster circuit is in parallel connection with the high voltage barrier diode and a high pressure gas discharge lamp, and the high pressure gas discharge lamp and the relay are in connection. The beneficial effects of the invention are as follows: the volume of the ignition transformer is reduced, the overall efficiency of the electronic ballast of the high pressure gas discharge lamp is increased; the voltage value of the storage capacitor in the sustained arc circuit is increased so as to more effectively complete the function of arc maintenance and increase the primary ignition success rate of the high pressure gas discharge lamp; and the overall cost is reduced.

A frequency-jitter-controller for a power-converter is provided, and which includes a first and a second capacitance units, a first and a second charge-discharge control units, a comparing unit and a control unit. Both capacitance units are charged to a crossing-voltage during a charging phase and discharged to a reference voltage and a clamp voltage respectively during a discharging-phase in response to operations of both charge-discharge control units. The comparing unit outputs a pulse signal, compares voltages of both capacitance units during the charging phase, and compares the voltage of the first capacitance unit and the reference voltage during the discharging phase. The control unit generates a frequency jitter control signal according to the pulse signal to adjust a rising rate of the voltage on the second capacitance unit, so as to change a frequency of the pulse signal, and thus reduce EMI generated by switching switch-elements in the power-converter.

A frequency-jitter-controller for a power-converter is provided, and which includes a first and a second capacitance units, a first and a second charge-discharge control units, a comparing unit and a control unit. Both capacitance units are charged to a crossing-voltage during a charging phase and discharged to a reference voltage and a clamp voltage respectively during a discharging-phase in response to operations of both charge-discharge control units. The comparing unit outputs a pulse signal, compares voltages of both capacitance units during the charging phase, and compares the voltage of the first capacitance unit and the reference voltage during the discharging phase. The control unit generates a frequency jitter control signal according to the pulse signal to adjust a rising rate of the voltage on the second capacitance unit, so as to change a frequency of the pulse signal, and thus reduce EMI generated by switching switch-elements in the power-converter.

The present invention provides a control circuit with multiple power sources, which accepts an output signal from a comparator circuit. This control circuit with multiple power sources contains two components: one is a voltage transferring circuit, which connects to the comparator and accepts the first and the second input voltages to react the controls of respective output signals for generating the first voltage potential and the second voltage potential; another is an output circuit, which connects to the voltage transferring circuit to react the controls of the first voltage potential and the second voltage potential for deciding the correct output from the first input voltage or the second input voltage.

The invention provides an array substrate and a liquid crystal display panel. The array substrate comprises a substrate body, a thin film transistor layer located on the substrate body and a pixel electrode located on the thin film transistor layer. The array substrate comprises a plurality of sub-pixel areas, and each sub-pixel area comprises a main area and an auxiliary area. The pixel electrodes are arranged corresponding to the main area and the auxiliary area, and each pixel electrode comprises a first main electrode and a first branch electrode which correspond to the main area, and a second main electrode and a second branch electrode which correspond to the auxiliary area; the first branch electrode is electrically connected with the first main electrode at a first preset angle;thesecond branch electrode is electrically connected with the second main electrode at a second preset angle;and the first preset angle is different from the second preset angle. By controlling the angle of the pixel electrode, the number of thin film transistors in the prior art is reduced, the pixel aperture opening ratio and transmittance are increased, and meanwhile the wide viewing angle effectof the liquid crystal display panel is achieved.

A signal driving system generates an output swinging between a first power supply (e.g., about 1.2 Volts), powering first and second drivers, and a second power supply (e.g., about 3.3 Volts), powering a first current mirror. The second power supply is generated external to the signal driving system and is used to allow for a desired common-mode differential output signal range. However, the second power supply produces voltage at a level above a rating of the devices in the signal driving system. Therefore, protection devices are used to protect the elements of the signal driving system from the second power supply. Accordingly, through use of the signal driving system of the present invention, a high voltage current mode driver can operate in a low voltage process without damaging the devices in the signal driving system.

The invention discloses a centrifugal preparation method of an electrolyte thin film of a solid oxide fuel cell. The centrifugal preparation method comprises the following steps: adding electrolyte powder to absolute ethyl alcohol, carrying out mixing and ball-milling, adding a polyethylene glycol (PEG) assistant, and further carrying out mixed grinding to obtain uniform and stable electrolyte slurry; fixing an anode support body of which one surface is bound by a transparent adhesive tape on an anode support body bearing platform, putting the bearing platform into a clean centrifugal tube, and slowly injecting the electrolyte slurry into the centrifugal tube until the anode support body is completely immersed; starting a centrifugal machine, forming a uniform electrolyte film base body on the surface of the anode support body, carrying out thermal treatment, and centrifuging for a plurality of times; and finally sintering the electrolyte film base body at a high temperature to form an electrolyte thin film body. The electrolyte thin film prepared by the method is uniform, compact, smooth and good in uniformity; the centrifugal preparation method is low in cost, simple in technology and convenient to operate; the thickness of the electrolyte thin film can be controlled by the running frequency and time of the centrifugal machine; and the centrifugal preparation method adapts to industrial production on a large scale.

The invention discloses a weight sensor circuit and a cooking tool, comprising a gravity sensor module and a zeroing circuit. The weight sensor module has a first output terminal and a second output terminal; the first output terminal and the second output terminal of the weight sensor are correspondingly connected to the two input terminals of a signal amplification circuit; the signal amplification circuit is used for performing amplification processing on the voltage difference between a first output terminal and a second output terminal; the zeroing circuit comprises a plurality of resistors; the first terminal of each resistor in the plurality resistors is connected to the first output terminal or the second output terminal of the weight sensor module; the output terminal of the signal amplification circuit is connected to a voltage sampling terminal of the controller; the controller is provided with a plurality of control terminals corresponding to the plurality of resistors; and each control terminal is connected to the second terminal of a corresponding resistor in the plurality of resistors. The technical scheme of the invention can increase the zeroing range, avoids the complex operation in the process of zeroing process during the production, and improves the production efficiency of the weight sensor.