Patent application number | Description | Published |
20080278234 | Output stage - An output stage, comprising a first transistor operable to pull a voltage at an output node towards a first voltage, and a rechargeable energy store having a potential difference between first and second terminals wherein the rechargeable energy store is arranged to be controllably connected between the output node and a second voltage supply such that the voltage at the output node can be driven to a voltage outside of a range defined between the first and second voltages. | 11-13-2008 |
20110080678 | ESD PROTECTION CIRCUIT FOR A SWITCHING POWER CONVERTER - An ESD protection circuit for a switching power converter which includes a high-side switching element connected between a supply voltage and the switching node, and a low-side switching element connected between the switching node and a common node. A current conduction path couples an ESD event that occurs on the switching node to an ESD sense node, and an ESD sensing circuit coupled to the sense node generates a trigger signal when an ESD event is sensed. A first logic gate keeps the high-side switching element off when the trigger signal indicates the sensing of an ESD event, and a second logic gate causes the low-side switching element to turn on when an ESD event is sensed such that the low-side switching element provides a conductive discharge path between the switching node and common node. | 04-07-2011 |
20120161728 | SWITCHING VOLTAGE REGULATORS WITH HYSTERETIC CONTROL FOR ENHANCED MODE-TRANSITION SPEED AND STABILITY - Switching voltage regulator embodiments are provided with hysteretic control to thereby switch between pulse-width modulation and pulse-frequency modulation operational modes. The switching is in response to different levels of an error voltage V | 06-28-2012 |
20130076252 | CURRENT CONTROLLING CIRCUIT FOR A LIGHT-EMITTING DIODE DRIVER AND PRODUCING METHOD THEREFOR - The present disclosure proposes a fully integrated accurate LED output current controlling circuit and method, which can be seamlessly combined with true PWM dimming. The current controlling circuit has an auto zero function in the light-emitting diode driver to eliminate offsets caused by the system, process variations, parasitic effects, dimming and so on in an LED driver application, and thus is capable of controlling the LED current with high accuracy. Moreover, the driver of the present disclosure does not require the use of external components such as an external resistor to regulate current accuracy. | 03-28-2013 |
20140253061 | SKIP MODE METHOD AND SYSTEM FOR A CURRENT MODE SWITCHING CONVERTER - A method and system to inhibit the switching of a current mode switching converter having high and low side switching elements coupled to an output inductor, the other end of which is coupled to an output node, and operated with respective modulated switching signals to regulate an output voltage Vout produced at the node. A current I | 09-11-2014 |
20140253083 | CONTROLLING CURRENT IN A SWITCHING REGULATOR - In one aspect, this disclosure relates to a method of controlling current output from a switching regulator to a load via an inductor. Inductor current information can be sampled at a peak level, such as just before a transistor configured to cause current to flow through the inductor is turned off. The sampled inductor current can be compared with a reference current, and a current limit threshold can be adjusted based on the comparison. The output current of the switching regulator can be controlled based on a comparison of the current limit threshold with an indicator of current flowing through the inductor. This method can accurately and efficiently limit current in a switching regulator. | 09-11-2014 |
20140266122 | APPARATUS AND METHODS FOR TRANSIENT COMPENSATION OF SWITCHING POWER REGULATORS - Apparatus and methods for generating a drive signal of a switching signal are disclosed. A first circuit receives an oscillating reference signal, a first compensation signal, a second compensation signal, and a third compensation signal. The first compensation signal is indicative of an error between an output voltage of a power converter and a reference voltage. The second compensation signal is indicative of the error relative to a threshold. The third compensation signal is indicative of an output current of the power converter. The first circuit generates a comparison signal having a waveform including pulses having durations based at least partly on a combination of the periodic reference signal, the first compensation signal, the second compensation signal, and the third compensation signal. A second circuit receives a clock signal and the comparison signal and generates a drive signal for activation and deactivation of a driver transistor. | 09-18-2014 |
20140268936 | ULTRA LOW-VOLTAGE CIRCUIT AND METHOD FOR NANOPOWER BOOST REGULATOR - At least one embodiment provides a method for a nanopower boost regulator to startup from an ultra-low-voltage (such as 0.3V˜0.5V) for energy harvesting applications. The method does not necessarily require a special process or any external components such as mechanical switches. The startup circuit can include an asynchronous boost circuit to charge up an output with stacked power NMOS transistors, a ring oscillator, and/or a charge pump, along with accompanying circuitry. | 09-18-2014 |
20140282349 | METHOD AND APPARATUS FOR CURRENT LIMIT TEST FOR HIGH POWER SWITCHING REGULATOR - A method can reuse at least one pin in demultiplexing (demuxing) a voltage from a pin. The method can be used to set an accurate current limit threshold in a design for test (DFT) phase and, thus, to accurately set a trimming code of a current limiter. The method uses the property that a power MOSFET has almost a same conductive resistance at a large drain current. Thus, the current limit threshold can be set according to an accurate drain-to-source voltage V | 09-18-2014 |
20150115923 | LOAD CURRENT READBACK AND AVERAGE ESTIMATION - A switching regulator or other apparatus or techniques can include load current monitoring to provide a digital representation of an estimated load current. Load current monitoring can be performed by a circuit including a counter circuit, a comparator circuit, and a digitally-controlled source coupled to the counter circuit and configured to adjust a bias condition of a sensing device in response to a count provided by the counter circuit in order to establish a proportional relationship between a current conducted by the sensing device and a corresponding current conducted by a power switching device. The counter circuit is configured to increment and decrement the count in response to information provided by the comparator output and the count is generally indicative of the estimated load current, such as an average load current. | 04-30-2015 |
20150123649 | SAMPLING CONTROL FOR MAXIMUM POWER POINT TRACKING - Apparatus and techniques for controlling measurement of an electrical parameter of an energy source can be used to obtain information for use in enhancing a power transfer efficiency between the energy source and a load. For example, during a first measurement cycle, information indicative of the electrical parameter of the energy source can be obtained using a measurement circuit during a first sampling duration in which the load is decoupled from the energy source. The information indicative of the obtained electrical parameter can be compared to a threshold. In response to the comparing, a different second sampling duration can be determined for use in obtaining information indicative of the electrical parameter during a subsequent measurement cycle. The information indicative of the electrical parameter of the energy source includes information for use in enhancing the power transfer efficiency between the energy source and the load. | 05-07-2015 |
20150194879 | CHARGE PUMP - This application discusses, among other things apparatus and methods for a voltage boost circuit. In an example, a voltage boost circuit can include first and second inverters, sharing a first supply node, and sharing a second supply node, a first charge transfer capacitor, configured to couple a first clock signal to the first inverter output, a second charge transfer capacitor, configured to couple a second clock signal to the second inverter output, the second clock signal being out-of-phase with the first clock signal, a first gate drive capacitor, configured to couple the first clock signal to the second inverter input, and a second gate drive capacitor, configured to couple the second clock signal to the first inverter input. | 07-09-2015 |
20150198635 | VOLTAGE DETECTION FOR LOW-POWER DEVICES - A device to sense voltage is provided. The device includes a first circuit operatively coupled to one or more nodes. The first circuit senses an electrical characteristic of each of the one or more nodes. The first circuit generates an adjustment signal based on the electrical characteristic sensed at each of the one or more nodes. A second circuit operatively receives a first voltage and a second voltage, the second circuit being configured to generate a third voltage by scaling the second voltage. The second circuit generates a comparison signal based on a comparison of the first voltage and the third voltage. | 07-16-2015 |
20150214835 | SINGLE INPUT MULTIPLE INPUT/OUTPUT SUPPLY FOR ENERGY HARVEST APPLICATION - An apparatus comprises a switching power circuit and a control circuit. The switching power converter circuit includes an output port for electrical coupling to a variable load, an input port for electrically coupling to a first energy source, wherein the energy density of the first energy source is insufficient to meet a peak energy requirement of the variable load, an input/output port for electrical coupling to a second energy source, and one inductor electrically coupled to the input port and a circuit node, wherein the electrical coupling is non-switchable. The control circuit is configured to charge the inductor using the first energy source via the input port, to provide energy from the inductor to the load via the output port, and to provide both of, via the input/output port, energy from the inductor to the second energy source and energy from the second energy source to the variable load. | 07-30-2015 |
20150280554 | MULTIPLE POWER PATH MANAGEMENT WITH MICRO-ENERGY HARVESTING - An apparatus comprises an output port for a circuit load, a first input port for an energy harvest source, an input/output port a second energy source, a first circuit path from the energy harvest source to the second energy source at the input/output port and to the variable load at the output port, a second circuit path from the second energy source to the output port, a cold start circuit that produces a first voltage level at the output port by charging a capacitor at the output port using energy of the energy harvest source, and a main converter circuit that produces a second regulated voltage level at the input/output port using energy of the energy harvest source when the voltage at the output port capacitor is above a specified voltage value and uses the energy of the capacitor at the output port during startup of the main converter circuit. | 10-01-2015 |
20150349637 | LOW QUIESCENT CURRENT PULL-DOWN CIRCUIT - A device to detect an electrical signal is provided. The device includes sensing, output, and pull-down nodes. The device includes a pull-down circuit having a native metal-oxide-semiconductor field-effect transistor (MOSFET) to pull down the output node to approximately a voltage of the pull-down node. The device includes a switch circuit having a junction field-effect transistor (JFET). The JFET turns on the pull-down circuit in response to a voltage of the sensing node being less than a first threshold. The JFET also turns off the pull-down circuit in response to the voltage of the sensing node being greater than the first threshold. | 12-03-2015 |
Patent application number | Description | Published |
20090069605 | Catalyst composition and producing process thereof for use in manufacturing methacrolein - A catalyst composition for use in manufacturing methacrolein by reacting with one of isobutene and t-butanol, the catalyst composition being represented by the formula of: x (Mo | 03-12-2009 |
20090078558 | NOVEL METHOD FOR PRODUCING (METH)ACRYLIC ACID AND (METH)ACRYLIC ESTERS - There is provided a method for rectifying a vinyl compound liquor, comprising the steps of: a) providing a rectification column operated at a temperature and pressure; b) feeding the vinyl compound liquor to be rectified into the rectification column; characterized in that the pressure of said rectification column and the temperature of said fed vinyl compound liquor are controlled such that the temperature of said fed vinyl compound liquor is in the range of from its bubble point at the pressure of said rectification column to 10° C. lower than said bubble point. | 03-26-2009 |
20090124825 | Method of (meth) acrylate production - A method of methacrylate production includes the steps of providing methacrylate gas mixture; absorbing said gas mixture by water to form a solution mixture; introducing said solution mixture into a distillation column, separating impure methacrylate from said solution mixture in said distillation column that solution of said impure methacrylate is collected at said stripping section of said distillation column; and removing acetic acid from said impure methacrylate to produce methacrylate. It effectively enhances the separation capacity of the distillation column, lowers the whole column pressure drop and operation temperature, avoids the polymerization tendency of the methacrylate under high temperature, to make the water content of the bottom discharging decreases to 0.6%, acetic acid content reduces to below 2%, methyl acrylic content of the top column water phase decreases to 0.5%, thereby reduces the methacrylate products unit consumption and improves the product quality. | 05-14-2009 |
20100204513 | Preparation process of a complex oxide catalyst and application thereof to the synthesis of the acrylic acid - The present invention provides a complex oxide catalyst whose general formula is Mo | 08-12-2010 |
20100323881 | Preparation process of a catalyst used for gas phase oxidation of light alkenes to unsaturated aldehydes - The present invention provides a preparation process of complex oxides catalyst containing Mo, Bi, Fe and Co, which comprising steps as following: dissolving precursor compounds of the components for catalyst and complexing agent in water to obtain a solution, and then drying, molding and calcining the solution to obtain catalyst. The catalyst is used for gas phase oxidation of light alkenes to unsaturated aldehydes. The catalyst has high activity, selectivity and stability. The reaction condition is mild. The preparation process of the catalyst is easy to operate and can be used for mass production. | 12-23-2010 |
20110295041 | CATALYST FOR PRODUCING UNSATURATED ALDEHYDE BY OXIDATION OF LOWER OLEFIN AT HIGH SPACE VELOCITY - A method of preparing a catalyst for producing acrolein by oxidation of propylene at high space velocity, said catalyst is a Mo—Bi—Fe—Co based composite metal oxide. Producing unsaturated aldehyde via partial oxidation of lower unsaturated olefin at high space velocity using said catalyst is suitable for process with or without off-gas recirculating. Said catalyst is prepared by co-precipitation, the reaction conditions for using said catalyst to produce unsaturated aldehyde are, the space velocity of unsaturated lower olefin relative to catalyst being 120˜200 h-1(STP), reaction temperature being 300˜420° C. and absolute pressure being 0.1˜0.5 MPa; a single-stage unsaturated lower olefin conversion ratio of greater than 98.0% and carbon oxide yield of less than 3.3% with an overall yield of unsaturated lower aldehyde and acid of greater than 94.0% are obtained. The process to prepare the said catalyst is simple, easy to be repeated, and capable of industrial scale-up. | 12-01-2011 |
20120135856 | PROCESS FOR REGENERATING A DEACTIVATED HETEROPOLYMOLYBDOPHOSPHORIC ACID CATALYST - The present invention provides a process for regenerating a deactivated heteropolymolybdophosphoric acid catalyst, comprising the steps of grinding the deactivated catalyst into particles having a particle size of 40 mesh or less, mixing the particles with a mixture comprising aqua ammonia, which is an aqueous solution containing ammonium ions and organic auxiliaries, kneading the mixture of particles and aqua ammonia in a kneader to obtain a paste, drying the paste, molding the paste into cylindrical particles with a through hole in its longitudinal axis, and heating the paste in atmosphere at 350˜450° C. for 1˜10 hours to produce the generated catalyst. | 05-31-2012 |
Patent application number | Description | Published |
20150364850 | Connector Housing - A connector housing is provide and includes a single sheet of material, a plurality of first connection members, and a plurality of second connection members. The single sheet of material includes a top wall, a pair of side walls, a bottom wall having a first bottom wall portion and a second bottom wall portion connected to the pair of side walls, and a partition member disposed between the top wall and the bottom wall to partition an inner space defined by the top wall, the pair of side walls and the bottom wall. The plurality of first connection members are disposed along one of the pair of longitudinal edge portions, while the plurality of second connection members are disposed along the other of the pair of longitudinal edge portions. The plurality of first connection members are keyed with the plurality of second connection members, respectively. | 12-17-2015 |
20150364869 | Connector Housing - A connector housing is provided and includes a single sheet of material having a top wall, a pair of side walls, rear end wall, a bottom wall, and a pair of partition members. The bottom wall includes a first bottom wall portion integrally connected with one of the pair of side walls, a second bottom wall portion integrally connected with the other of the pair of side walls, and a third bottom wall portion separated from and assembled to the first and second bottom wall portions. The pair of partition members is disposed between the top wall and the bottom wall to divide an inner receiving space that is defined by the top wall, the pair of side walls and the bottom wall into three insertion ports. | 12-17-2015 |
20150364870 | Connector Housing - The present invention discloses a connector housing comprising: an upper housing portion; a lower housing portion located below the upper housing portion; and at least three partition members located an inner space defined by the upper housing portion and the lower housing portion for partitioning the inner space into at least four insertion ports. At least one pair of the at least three partition members are connected to each other through a connecting plate so as to form a frame part in a general “ | 12-17-2015 |
Patent application number | Description | Published |
20120190276 | POLISHING PAD AND METHODS FOR MANUFACTURING AND USING THE SAME - This invention provides a polishing pad, which includes a substrate and a plurality of discrete abrasive blocks fixed on the substrate, wherein the abrasive blocks are of at least two kinds of heights. This invention would not reduce the polishing rate dramatically during the process for polishing a wafer by using the polishing pad in the long run. Therefore a thickness of the wafer to be polished is able to be controlled accurately, thereby improving the effect and yield of polishing the wafer. The present invention further provides a method for manufacturing the polishing pad. The polishing pad according to this invention is manufactured conveniently by using this method. Correspondingly, a method for using the polishing pad is also provided in this invention. | 07-26-2012 |
20120190278 | POLISHING METHOD AND POLISHING DEVICE - A polishing method includes: mounting a wafer on a fixed abrasive polishing pad located on a polishing platen; delivering a polishing slurry to the fixed abrasive polishing pad to polish the wafer; and adsorbing abrasive particles generated during the polishing process with an electrode. The electrode has a polarity opposite to a polarity of charges of the abrasive particles. A polishing device includes a polishing platen, a fixed abrasive polishing pad, a slurry pipeline and a polarity changer having an electrode. Therefore, the abrasive particles generated during the polishing process are removed, which prevents the wafer from being scratched, thereby increasing wafer yield and improving efficiency. | 07-26-2012 |
20120220128 | METHOD FOR MANUFACTURING A TRANSISTOR - The invention provides a method for manufacturing a transistor which includes: providing a substrate having a plurality of transistors formed thereon, wherein each transistor includes a gate; forming a stressed layer and a first oxide layer on the transistors and on the substrate successively; forming a sacrificial layer on the first oxide layer; patterning the sacrificial layer to remove a part of the sacrificial layer which covers on the gates of the transistors; forming a second oxide layer on the residual sacrificial layer and on a part of the first oxide layer which is exposed after the part of the sacrificial layer is removed; performing a first planarization process to remove a part of the second oxide layer located on the gates of the transistors; performing a second planarization process to remove the residual second oxide layer; and performing a third planarization process to remove the stressed layer. | 08-30-2012 |
20150333063 | SEMICONDUCTOR DEVICES AND FABRICATION METHOD THEREOF - A method for fabricating a semiconductor device includes providing a semiconductor substrate having a first region and a second region; and forming at least one first dummy gate in the first region and at least one second dummy gate in the second region. Further, the method includes forming a dielectric layer with a top surface leveling with a surface of the first dummy gate on the semiconductor substrate; oxidizing a top portion of the second dummy gate to form a protective layer to prevent over-polishing on the second region; removing the first dummy gate to form a first gate trench; forming a first metal layer to fill the first gate trench and cover the protective layer and the dielectric layer; and removing a portion of the first metal layer higher than the dielectric layer to form a first metal gate in the first gate trench. | 11-19-2015 |
Patent application number | Description | Published |
20090111847 | PREPARATION METHOD AND USE OF COMPOUNDS HAVING HIGH INSECTICIDAL ACTIVITIES - The present invention discloses a kind of nitromethylene derivatives as well as their preparation method and their uses. The insecticidal activity tests show that the nitromethylene derivatives of the present invention not only show high insecticidal activities against insects with piercing-sucking type or scratching type mouthparts, such as aphid, leafhopper, plant hopper, thrips and white fly and their resistant strains, but also show high insecticidal activities against | 04-30-2009 |
20100298346 | NITROGENOUS HETEROCYCLIC COMPOUNDS WITH INSECTICIDAL ACTIVITY, AND THE PREPARATION AND USE THEREOF - The present invention relates to nitro-containing heterocyclic or ring-opening nitrogenous compounds of formula (A), wherein R | 11-25-2010 |
20110269751 | HETEROCYCLIC NITROGENOUS OR OXYGENOUS COMPOUNDS WITH INSECTICIDAL ACTIVITY FORMED FROM DIALDEHYDES AND THEIR PREPARATION AND USES THEREOF - The heterocyclic nitrogenous or oxygenous compounds of formula (A), (B), (C) or (D) formed from dialdehydes, their optical isomers, cis- and trans- isomers, or agrochemically acceptable salts, their preparation methods, agrochemical compositions comprising the compounds and the uses thereof are provided. The compounds and their derivatives have high insecticidal activities to several farming and forestry pests including homoptera and lepidoptera pests, such as aphis, fulgorid, whitefly, leafhopper, common thrips, cotton bollworm, cabbage caterpillar, cabbage moth, cotton leafworm, armyworm and so on. | 11-03-2011 |
20120245126 | DIVALENT AND OXABRIDGED HETEROCYCLIC NEONICOTINOID COMPOUNDS AND PREPARATION METHODS THEREOF - Nitromethylene analogues of imidacloprid and divalent and oxabridged heterocyclic neonicotinoid compounds constructed by dialdehydes, preparation methods and uses thereof are disclosed. Compounds represented by formula (A) or (B), their optical isomers or agrochemically acceptable salts are provided. Agrochemical compositions comprising the said compounds, their optical isomers or agrochemically acceptable salts, the uses of the said agrochemical compositions and the preparation methods of the said compounds, their optical isomers or agrochemically acceptable salts are also disclosed. The compounds and their derivatives have high insecticidal activities to several farming and forestry pests including homoptera and lepidoptera pests, such as | 09-27-2012 |