Patent application number | Description | Published |
20080257395 | Miniature quantum well thermoelectric device - A miniature quantum well thermoelectric device. The device includes a number of quantum well n-legs and a number of quantum well p-legs. Each of the p-legs are alternately electrically connected in series with each of the n-legs at locations that are thermal communication with a cold side and a hot side. The device can be adapted to function as a cooler and it can be adapted to function as an electric power generator. In a preferred embodiment the p-legs and said n-legs are configured generally radially between the hot side and the cold side. In this preferred embodiments each of the n-legs has at least 600 n-type layers with each n-type layer separated from other n-type layers by an insulating layer and each of the p-legs has at least 600 p-type layers with each p-type layer separated from other p-type layers by an insulating layer. | 10-23-2008 |
20100269879 | Low-cost quantum well thermoelectric egg-crate module - Quantum well thermoelectric modules and a low-cost method of mass producing the modules. The devices are comprised of n-legs and p-legs, each leg being comprised of layers of quantum well material in the form of very thin alternating layers. In the n-legs the alternating layers are layers of n-type semiconductor material and electrical insulating material. In the p-legs the alternating layers are layers of p-type semiconductor material and electrical insulating material. In preferred embodiments the layers, referred to as superlattice layers are about 4 nm to 20 nm thick. The layers of quantum well material is separated by much larger layers of thermal and electrical insulating material such that the volume of insulating material in each leg is at least 20 times larger than the volume of quantum well material. | 10-28-2010 |
20110062420 | Quantum well thermoelectric module - Quantum well thermoelectric modules and a low-cost method of mass producing the modules. The devices are comprised of n-legs and p-legs, each leg being comprised of layers of quantum well material in the form of very thin alternating layers. In the n-legs the alternating layers are layers of n-type semiconductor material and electrical insulating material. In the p-legs the alternating layers are layers of p-type semiconductor material and electrical insulating material. Both n-legs and p-legs are comprised of materials providing similar thermal expansion. In preferred embodiments the layers, referred to as super-lattice layers are about 4 nm to 20 nm thick. The layers of quantum well material is separated by much larger layers of thermal and electrical insulating material such that the volume of insulating material in each leg is at least 20 times larger than the volume of quantum well material. | 03-17-2011 |
20110100408 | Quantum well module with low K crystalline covered substrates - A thermoelectric module comprised of a quantum well thermoelectric material with low thermal conductivity and low electrical resitivity (high conductivity) for producing n-legs and p-legs for thermoelectric modules. These qualities are achieved by fabricating crystalline quantum well super-lattice layers on a substrate material having very low thermal conductivity. Prior to depositing the super-lattice thermoelectric layers the low thermal conductivity substrate is coated with a thin layer of crystalline semi-conductor material, preferably silicon. This greatly improves the thermoelectric quality of the super-lattice quantum well layers. In preferred embodiments the super-lattice layers are about 4 nm to 20 nm thick. In preferred embodiments about 100 to 1000 of these super-lattice layers are deposited on each substrate layer, to provide films of super-lattice layers with thicknesses of in the range of about 0.4 microns to about 20 microns on much thicker substrates. The substrates may be a few microns to a few millimeters thick. The thermoelectric films are then stacked and fabricated into thermoelectric p-legs and n-legs which in turn are fabricated into thermoelectric modules. These layers of quantum well material may in preferred embodiments be separated by much thicker layers of thermal and electrical insulating material such that the volume of insulating material in each leg is at least 20 times larger than the volume of quantum well material. | 05-05-2011 |
20110284048 | MULTI-LAYER SUPERLATTICE QUANTUM WELL THERMOELECTRIC MATERIAL AND MODULE - A multi-layer superlattice quantum well thermoelectric material comprising at least 10 alternating layers has a layer thickness of each less than 50 nm, the alternating layers being electrically conducting and barrier layers, wherein the layer structure shows no discernible interdiffusion leading to a break-up or dissolution of the layer boundaries upon heat treatment at a temperature in the range from 50 to 150° C. for a time of at least 100 hours and the concentration of doping materials in the conducting layers is 10 | 11-24-2011 |
Patent application number | Description | Published |
20130197153 | HETEROPHASIC POLYPROPYLENE WITH HIGH FLOWABILITY AND ENHANCED MECHANICAL PROPERTIES - The present invention relates to a heterophasic polypropylene resin comprising a crystalline propylene homopolymer matrix (A) and an amorphous propylene copolymer phase (B) dispersed within the matrix having excellent mechanical properties, in particular at low temperatures, and at the same time high flowability. Further, the invention relates to a production process of the heterophasic polypropylene resin, the use of such a resin in a polypropylene composition and to articles made of the heterophasic polypropylene resin. | 08-01-2013 |
20140024794 | POLYPROPYLENE WITH LIVING HINGE PROPERTIES - The present invention relates to a polypropylene which has—a melt flow rate MFR(230° C., 2.16 kg) of at least 13 g/10 min,—an amount of xylene solubles XS of 6.0 wt % or less, and—a crystalline fraction, wherein at least 10% of the crystalline fraction melts the temperature range of from 160 to 170° C., as determined by the stepwise isothermal segregation technique (SIST). | 01-23-2014 |
20140128549 | IN-SITU REACTOR BLEND OF A ZIEGLER-NATTA CATALYSED, NUCLEATED POLYPROPYLENE AND A METALLOCENE CATALYSED POLYPROPYLENE - Propylene homo- or copolymer composition comprising an in-situ reactor blend of a Ziegler-Natta catalysed, nucleated polypropylene (znPP) and a metallocene catalysed polypropylene (mcPP), in a weight ratio in the range of 6:94 to 50:50 (wt % znPP:wt % mcPP), preferably in the range of 10:90 to 44:56 (wt % znPP:wt % mcPP), having an excellent balance between optical properties, mechanical properties, thermal properties and processing properties; a process for its production and the use of a mixture of a Ziegler-Natta catalyst system and a metallocene catalyst system. | 05-08-2014 |
Patent application number | Description | Published |
20110086603 | Radio Frequency Tuner - A RF tuner is described for handling RF signals in a broad frequency range and a broad power range while maintaining high linearity and tolerating high power blockers. A continuous feedback loop comprising a substantially linear LNA and a radio frequency RSSI can adjust the power of the RF signal on the RF side. On the IF side, a continuous feedback loop comprising a substantially linear, variable gain transconductor and a RSSI can adjust the power of the IF signal. | 04-14-2011 |
20110117868 | SYSTEM AND METHOD FOR HANDLING STRONG SIGNALS AND BLOCKERS IN THE RF FRONT END - An incoming RF signal can be amplified in a RF front end of a RF receiver by conveying the signal through one of a multiple amplification paths. On each path, the gain can be controlled by RF automatic gain control (AGC) circuits. Each amplification path can be designed to handle incoming signals in a designated power range and to optimize receiver performance characteristics such as the noise figure (NF) and odd harmonic linearity in that power range. Signal power can be measured at different locations of the receiver and bypass switches can be used to convey the RF signals down one of the multiple paths based on the power measurements, according to executable logical code. An incoming signal power hysteresis can be applied to stabilize the system. Further, signal power averaging and switch delaying mechanisms can be employed to stabilize the system for rapidly fluctuating signals. | 05-19-2011 |
20110230156 | Dynamic Gain Assignment in Analog Baseband Circuits - A system and method is provided for filtering and amplifying a signal where amplification can be distributed between stages of a filter and gain can be assigned throughout the filter to optimize system performance. Such a system can be implemented in the baseband section of RF receivers. VGAs can be implemented between filter stages, such as biquads, or VGAs can be incorporated in filter stages. Substantially linear VGAs comprising a parallel resistor array can be incorporated in the circuitry of the filter stages to reduce distortion. Gain can be assigned dynamically in the amplification stages to improve noise and/or linearity performance. For example, gain assignments can be implemented so that high power undesired signal components are filtered out before amplification to prevent component saturation, and low power signals are amplified before they are filtered to improve noise performance. | 09-22-2011 |
20120269245 | MIRROR SIGNAL IQ-IMBALANCE CORRECTION - A system and method are provided for calibrating the IQ-imbalance in a low-IF receiver. A Test Signal can be generated in a mirror frequency and conveyed to the receiver. The power of the signal produced in the receiver from the conveyed Test Signal can be measured. In the absence of an IQ-imbalance, the Test Signal can be completely eliminated in the receiver and the corresponding measured power of the produced signal can be minimized. Accordingly, a two dimensional algorithm is described for calibrating a receiver and correcting the IQ-imbalance by adjusting the phase and gain difference between the I and Q channels in the receiver based on the measured power of the signal produced in the receiver. | 10-25-2012 |
20130005289 | SYSTEM AND METHOD FOR HANDLING STRONG SIGNALS AND BLOCKERS IN THE RF FRONT END - An incoming RF signal can be amplified in a RF front end of a RF receiver by conveying the signal through one of a multiple amplification paths. On each path, the gain can be controlled by RF automatic gain control (AGC) circuits. Each amplification path can be designed to handle incoming signals in a designated power range and to optimize receiver performance characteristics such as the noise figure (NF) and odd harmonic linearity in that power range. Signal power can be measured at different locations of the receiver and bypass switches can be used to convey the RF signals down one of the multiple paths based on the power measurements, according to executable logical code. An incoming signal power hysteresis can be applied to stabilize the system. Further, signal power averaging and switch delaying mechanisms can be employed to stabilize the system for rapidly fluctuating signals. | 01-03-2013 |
20130101012 | FULL BAND CABLE RECEIVER - Systems and methods are described for the implementation of a full band cable receiver by using a combination of tuners (e.g., ultra-low power Tuners) and Analog-to-Digital Converters (ADCs) to attain the goal of digitization with reduced power and/or cost. The full-band capture cable receiver can overcome the constraints of conventional cable receiver systems and deliver multiple channels, thereby allowing operators to provide consumers with an increased number of services. | 04-25-2013 |
20130120068 | RADIO FREQUENCY SIGNAL GAIN CONTROL - An RE receiver is described comprising a common gate common source LNA with a variable resistor in the source of the common gate transistor, a variable resistor in the source of the common source transistor, and a variable resistor in the RE input. A Smart Gain Control varies the resistance in the resistors to produce linear amplification in the LNA while maintaining input matching. Further, a broad dynamic range RSSI is described that implements a feedback control loop to maintain signal power within a sensitivity range of the power detector in the RSSI. | 05-16-2013 |
20130235918 | DYNAMIC GAIN ASSIGNMENT IN ANALOG BASEBBAND CIRCUITS - A system and method is provided for filtering and amplifying a signal where amplification can be distributed between stages of a filter and gain can be assigned throughout the filter to optimize system performance. Such a system can be implemented in the baseband section of RF receivers. VGAs can be implemented between filter stages, such as biquads, or VGAs can be incorporated in filter stages. Substantially linear VGAs comprising a parallel resistor array can be incorporated in the circuitry of the filter stages to reduce distortion. Gain can be assigned dynamically in the amplification stages to improve noise and/or linearity performance. For example, gain assignments can be implemented so that high power undesired signal components are filtered out before amplification to prevent component saturation, and low power signals are amplified before they are filtered to improve noise performance. | 09-12-2013 |
20140103998 | RADIO FREQUENCY SIGNAL GAIN CONTROL - An RE receiver is described comprising a common gate common source LNA with a variable resistor in the source of the common gate transistor, a variable resistor in the source of the common source transistor, and a variable resistor in the RE input. A Smart Gain Control varies the resistance in the resistors to produce linear amplification in the LNA while maintaining input matching. Further, a broad dynamic range RSSI is described that implements a feedback control loop to maintain signal power within a sensitivity range of the power detector in the RSSI. | 04-17-2014 |
20140161168 | MIRROR SIGNAL IQ-IMBALANCE CORRECTION - A system and method are provided for calibrating the IQ-imbalance in a low-IF receiver. A Test Signal can be generated in a mirror frequency and conveyed to the receiver. The power of the signal produced in the receiver from the conveyed Test Signal can be measured. In the absence of an IQ-imbalance, the Test Signal can be completely eliminated in the receiver and the corresponding measured power of the produced signal can be minimized. Accordingly, a two dimensional algorithm is described for calibrating a receiver and correcting the IQ-imbalance by adjusting the phase and gain difference between the I and Q channels in the receiver based on the measured power of the signal produced in the receiver. | 06-12-2014 |
20140256280 | DYNAMIC GAIN ASSIGNMENT IN ANALOG BASEBAND CIRCUITS - A system and method is provided for filtering and amplifying a signal where amplification can be distributed between stages of a filter and gain can be assigned throughout the filter to optimize system performance. Such a system can be implemented in the baseband section of RF receivers. VGAs can be implemented between filter stages, such as biquads, or VGAs can be incorporated in filter stages. Substantially linear VGAs comprising a parallel resistor array can be incorporated in the circuitry of the filter stages to reduce distortion. Gain can be assigned dynamically in the amplification stages to improve noise and/or linearity performance. For example, gain assignments can be implemented so that high power undesired signal components are filtered out before amplification to prevent component saturation, and low power signals are amplified before they are filtered to improve noise performance. | 09-11-2014 |
20150049823 | FULL BAND CABLE RECEIVER - Systems and methods are described for the implementation of a full band cable receiver by using a combination of tuners (e.g., ultra-low power Tuners) and Analog-to-Digital Converters (ADCs) to attain the goal of digitization with reduced power and/or cost. The full-band capture cable receiver can overcome the constraints of conventional cable receiver systems and deliver multiple channels, thereby allowing operators to provide consumers with an increased number of services. | 02-19-2015 |
20150249475 | RADIO FREQUENCY TUNER - A RF tuner is described for handling RF signals in a broad frequency range and a broad power range while maintaining high linearity and tolerating high power blockers. A continuous feedback loop comprising a substantially linear LNA and a radio frequency RSSI can adjust the power of the RF signal on the RF side. On the IF side, a continuous feedback loop comprising a substantially linear, variable gain transconductor and a RSSI can adjust the power of the IF signal. | 09-03-2015 |
20150256209 | DYNAMIC GAIN ASSIGNMENT IN ANALOG BASEBBAND CIRCUITS - A system and method is provided for filtering and amplifying a signal where amplification can be distributed between stages of a filter and gain can be assigned throughout the filter to optimize system performance. Such a system can be implemented in the baseband section of RF receivers. VGAs can be implemented between filter stages, such as biquads, or VGAs can be incorporated in filter stages. Substantially linear VGAs comprising a parallel resistor array can be incorporated in the circuitry of the filter stages to reduce distortion. Gain can be assigned dynamically in the amplification stages to improve noise and/or linearity performance. For example, gain assignments can be implemented so that high power undesired signal components are filtered out before amplification to prevent component saturation, and low power signals are amplified before they are filtered to improve noise performance. | 09-10-2015 |
Patent application number | Description | Published |
20120044295 | REDUCTION OF MISTING IN HIGH SPEED OFFSET PRINTING - An ink or coating composition is rheologically tested at three or more temperatures which substantially cover the anticipated range of printing operation temperatures expected to be encountered during printing to determine the value of the rheological parameters viscous modulus, phase angle and phase-angle slope, and to identify values of these parameters encountered during printing around which the structural behavior of the ink or coating changes. An ink composition that has a phase angle of at least 55°, a viscous modulus of at least 150 Pa, and a phase-angle slope of at least −0.5°/° C. exhibits low misting when employed in high speed printing apparatus. | 02-23-2012 |
20120325102 | VISCOELASTICITY OF INKS FOR HIGH SPEEDING PRINTING - An ink for high-speed printing is formulated by controlling the phase angle of the ink to less than 60° at a frequency of 10 Hz when the ratio of the total non-volatiles volume fraction of the ink to the maximum total non-volatiles volume fraction of the ink is a ratio between about 0.40 to about 0.90. An ink for high-speed printing includes one or more resins, one or more colorants, one or more solvents, and one or more additives. The ink can be a flexographic ink, a rotogravure ink, a heatset offset ink, or a publication gravure ink. A print of the ink includes less than 1% of pinholes by area. The ink is applied to a substrate, which moves at a speed of greater than 1200 feet/min. | 12-27-2012 |
20130136903 | DESIGN OF HIGH SPEED SOLVENT-BASED FLEXOGRAPHIC/ROTOGRAVURE PRINTING INKS - Solvent-based flexographic or rotogravure inks are formulated to provide good pin-holing performance at high-speed printing conditions by combining the ink ingredients such the Maron-Pierce MPF (Maximum Packing Fraction) of the resulting ink is below 42 volume percent at a shear of either 10 reciprocal seconds or 2100 reciprocal seconds or both. | 05-30-2013 |
Patent application number | Description | Published |
20080261050 | Multilayer Fluoropolymer Films - The invention relates to a multi-layer film having at least one fluoropolymer layer, useful for high-purity contact applications. Preferably the fluoropolymer layer(s) are polyvinylidene fluoride polymers and copolymers. | 10-23-2008 |
20080281031 | Polyvinylidene Fluoride Having an Increased Melting Point - The invention relates to compositions of polyvinylidene fluoride (PVDF) and its copolymers that have been modified with an onium salt. The PVDF compositions exhibit an increased melting point, a reduced heat distortion and piezo properties. The improved properties can be further enhanced through annealing, and/or the addition of nanoclays. Additionally, the combination of PVDF, nanoclays and annealing can also produce a PVDF with an increased melting point and piezoelectric properties. | 11-13-2008 |
20090069488 | FLUOROPOLYMERS HAVING IMPROVED WHITENESS - The present invention relates to the preparation of a fluoropolymer exhibiting improved whiteness upon fabrication. The fluoropolymer is a multiphase copolymer or blend of fluropolymers. Fluoropolymer compositions of this invention could have application in both melt processing and solvent casting operations for such products as pipes, tubes, sheets, rods, solvent-casted and melt-processed films. | 03-12-2009 |
20100119748 | FOAMED POLYVINYLIDENE FLUORIDE TUBULAR STRUCTURES - The invention relates to foamed polyvinylidene tubular structures—and particularly those for use as conduit. The tubular structures may be corrugated, and are especially useful for fiber-optic plenum conduit. The polyvinylidene foam may also be directly applied to fiber optic cable. | 05-13-2010 |
20100175742 | PHOTOVOLTAIC MODULES HAVING A POLYVINYLIDENE FLUORIDE BACKSHEET - The invention relates to a photovoltaic module for capturing and using solar radiation having as a backsheet a composition containing polyvinylidene fluoride. The polyvinylidene fluoride backsheet layer is exposed to the environment and provides chemical resistance, low water vapor transmission, electrical insulation, and UV light protection. | 07-15-2010 |
20110278193 | POLYVINYLIDENE BARRIER LAYER FOR CONTAINER INTERIORS - The invention relates to containers having a thin layer of polyvinylidene fluoride polymer or copolymer on its inner and/or outer surface. The polyvinylidene fluoride layer acts as a barrier layer in reducing or preventing the migration of chemicals from thermoplastic or thermoset polymeric containers into the contents of the container. This is especially applicable for containers in the food, biotech and pharmaceutical industries, as well as for toxic or corrosive materials. | 11-17-2011 |
20120045603 | FOAMED POLYVINYLIDENE FLUORIDE STRUCTURE - The invention relates to a foamed fluoropolymer, preferably a polyvinylidene fluoride (PVDF) structure, such as from Kynar® resins. The foamed structure is continuous self-supporting, sized, and has a dense skin. The foamed structure is manufactured in a process using foaming agents and nucleating agents. The structure is sized into a specific shape during the manufacturing process—requiring a good melt viscosity of the PVDF foam. In one process, a master batch containing the nucleating agent is used. The foamed article could be a sheet, film, profile, tube, pipe, article, rod foam-core structure, or other self-supporting shape. Foamed tubes, pipes, rods, sheets and conduit are especially useful. The foamed structure of the invention provides added value by being lighter weight, more flexible, and more impact resistant than a comparable non-foamed PVDF structure. It also has increased hysteresis, increased insulation properties, reduced dielectric constant, and increased compressibility. | 02-23-2012 |
20120245238 | MELT PROCESSABLE COMPOSITION FROM RECYCLED MULTI-LAYER ARTICLES CONTAINING A FLUOROPOLYMER LAYER - The invention relates to a composition that has been obtained by the melt-process recycling of one or more multi-layer articles, where the multi-layer articles are composed of at least one melt-processible fluoropolymer layer. The composition of the invention is a compatible blend of the different layers from the multi-layer articles. The other layers of the multi-layer articles are also melt-processible, and include one or more layers chosen from: a) a melt-processible fluoropolymer of a different composition, b) a non-fluoropolymer, and c) a barrier layer. The composition is useful for forming an article in a melt-process operation. The composition may be used by itself, may be blended with other virgin or recycled materials, or may be used at low levels with melt-processible polymers as a process aid. | 09-27-2012 |
20130108816 | MULTI-LAYER FLUOROPOLYMER FOAM STRUCTURE | 05-02-2013 |
20140148528 | IRRADIATED FLUOROPOLYMER ARTICLES HAVING LOW LEACHABLE FLUORIDE IONS - The invention relates to fluoropolymer articles that have been irradiated with at least 5 Kilo Gray of radiation, where the resulting articles have low levels of leachable or extractable fluoride ion. The low fluoride ion migration from the irradiated article is due to the presence of low levels of metalic salts or oxides in the fluoropolymer composition. The invention is especially useful for fluoropolymer articles in which the fluorpolymer layer contacts a biological or pharmaceutical fluid, and that are subjected to sterilization by irradiation. | 05-29-2014 |
20140333002 | MELT PROCESSABLE COMPOSITION FROM RECYCLED MULTI-LAYER ARTICLES CONTAINING A FLUOROPOLYMER LAYER - The invention relates to an article that has been obtained by the melt-process recycling of one or more multi-layer articles, where the multi-layer articles are composed of at least one melt-processible polyvinylidene fluoride layer. The composition of the invention is a compatible blend of the different layers from the multi-layer articles. The other layers of the multi-layer articles are also melt-processible, and include one or more layers chosen from: a) a melt-processible fluoropolymer of a different composition, b) a non-fluoropolymer, and c) a barrier layer. The composition is useful for forming an article in a melt-process operation. The composition may be used by itself, may be blended with other virgin or recycled materials, or may be used at low levels with melt-processible polymers as a process aid. | 11-13-2014 |
20150329697 | IRRADIATED FLUOROPOLYMER ARTICLES HAVING LOW LEACHABLE FLUORIDE IONS - The invention relates to fluoropolymer articles that have been irradiated with at least 5 Kilo Gray of radiation, where the resulting articles have low levels of leachable or extractable fluoride ion. The low fluoride ion migration from the irradiated article is due to the presence of low levels of metallic salts or oxides in the fluoropolymer composition. The invention is especially useful for fluoropolymer articles in which the fluoropolymer layer contacts a biological or pharmaceutical fluid, and that are subjected to sterilization by irradiation. | 11-19-2015 |