Patent application number | Description | Published |
20090185398 | Integrated magnetics switching converter with zero inductor and output ripple currents and lossless switching - Switching Converter with a novel two-loop Integrated magnetic structure integrates transformer and two output inductors and eliminates large circulating current in the transformer secondary side resulting in ultra high efficiency and zero ripple output current as well as zero ripple currents in both output inductors simultaneously. The novel lossless switching method eliminates the primary side switching losses to result in switching converter with highest efficiency, compact size and additional performance advantages, such as ultra low output ripple voltage, low EMI noise and improved reliability with additional benefits when operated with a front-end Power Factor Converter for computer server applications. | 07-23-2009 |
20100259240 | Bridgeless PFC converter - A truly Bridgeless PFC converter is provided which eliminates the four-diode bridge rectifier and operates directly from the AC line to result in high-efficiency, small size and low cost solution for Power Factor Correction applications. | 10-14-2010 |
20100259241 | Voltage step-down switching DC-to-DC converter - A number of non-isolated and isolated converter embodiments are disclosed all featuring the three switches and characteristic not present in prior-art converters such as: a) reduced voltage stresses on all three switches resulting in safe operation without a danger of voltage overstress of any of the three switches over the full operating range from duty ratio of 0 to 1.0 and thus resulting in wide input voltage operating. b) operating range with magnetics flux and magnetic size much reduced compared to prior-art converters c) stressless switching eliminates switching losses and reduces stresses which are present in prior-art converters. All three features result in simultaneous increase of efficiency, reduction of size and cost when compared with prior-art converters. | 10-14-2010 |
20110057640 | Storageless step-down switching DC-DC converter - A storageless DC-DC converter is provided having simultaneously ultra high efficiency of 99.5% in an ultra compact size leading to 1 kW/inch | 03-10-2011 |
20110169474 | Step-down switching PFC converter - The step-down switching converter is provided, which promises to replace the conventional buck converter in many applications due to its many advantage, such as higher efficiency, smaller size, fast transient response and lower cost among other benefits. | 07-14-2011 |
20110175591 | Step-down low ripple switching converter - The step-down switching converter is provided, which promises to replace the conventional buck converter in many applications due to its many advantage, such as higher efficiency, smaller size, fast transient response and lower cost and ultra low output ripple voltage among other benefits. | 07-21-2011 |
20110285369 | Three-switch step-down converter - A three-switch step-down converter provides efficiency, size, cost and other performance advantages over the conventional two-switch buck converter and other step-down converters, over the entire duty ratio operating range. | 11-24-2011 |
20110292703 | Single-stage AC-to-DC converter with isolation and power factor correction - A new class of Single-Stage AC-DC converters with built-in Isolation and PFC feature is introduced along with the companion hybrid switching conversion method. Several different converter topologies are introduced, which all feature three switches only, single magnetic component and low voltage stresses on all switches. | 12-01-2011 |
20120001612 | Four-switch step-down storageless converter - A four-switch step-down storageless DC-DC converter is provided having simultaneously ultra high efficiency of over 99% in an ultra compact size, while also providing a regulation and maintaining fast transient response while in regulation. Because of its storageless feature it is ideal for demanding computer applications, such as VRM (Voltage Regulator Modules), with extremely fast step-load load current change requirements and tight output voltage regulation requiring ultra low output ripple voltages during the transients. | 01-05-2012 |
20120044722 | ISOLATED SWITCHING CONVERTER - The isolated voltage step-down switching DC-DC converter has one magnetic component, the isolation transformer, and two small size resonant inductors. The transformer is built on a magnetic core with no air-gap, hence no DC storage and thus results in fast load transient response. Two active switches on the primary side have voltage stresses equal to input voltage and two current rectifiers on secondary side have voltage stresses equal to output DC voltage under all operating duty ratio conditions. The converter operates with two independent resonance's, one coinciding with the ON-time interval and the other coinciding with the OFF-time interval resulting in all switches being turned ON and turned OFF at zero current. Primary side high voltage switches operate with zero-voltage switching for all load currents. Despite the two resonance's, the output voltage is controlled by use of the variable duty ratio, constant switching frequency PWM method. | 02-23-2012 |
20120120697 | Three-phase isolated rectifer with power factor correction - A new class of Three-Phase Isolated Rectifiers with Power Factor Correction provides a high efficiency, small size and low cost due to direct conversion from three-phase input voltage to output DC voltage. | 05-17-2012 |
20120249102 | Hybrid-switching Step-down Converter with a Hybrid Transformer - The present invention employs a resonant inductor, a resonant capacitor and a hybrid transformer using a Hybrid-switching method with three switches which results in two distinct switched-networks: one for ON-time interval and another for OFF-time interval. Resonant inductor is placed in series with the hybrid transformer primary to insure the continuity of primary and secondary currents at the switching transitions. The hybrid transformer converts both inductive and capacitive energy storage from the source to the load. The two-phase extension results in tenfold reduction of the output current ripple. | 10-04-2012 |
20120262967 | SINGLE-STAGE INVERTER WITH HIGH FREQUENCY ISOLATION TRANSFORMER - The novel single-stage power processing DC-AC inverter topology with high frequency isolation transformer eliminates the four-transistor unfolding full-bridge stage and provides the output AC voltage at high power conversion efficiency. The new inverter topology has only three switches, two resonant capacitors, a resonant inductor, an output inductor and a small size high-frequency isolation transformer, which does not store the DC energy. The output AC voltage is obtained by the PWM sinusoidal modulation of the duty ratio control of the three switches and can be regulated against the input voltage changes. | 10-18-2012 |
20120268969 | DC-AC INVERTER WITH HIGH FREQUENCY ISOLATION TRANSFORMER - The novel DC-AC inverter topology with high frequency isolation transformer consists of an input DC-DC converter with high frequency isolation transformer and an output full-bridge unfolding converter with four transistors provides the output AC voltage from a DC source. The input DC-DC converter has two primary side controllable switches and a single rectifier on the secondary side, two resonant capacitors, a resonant inductor, an output inductor and a high-frequency isolation transformer, which does not store DC energy. The duty ratio D of the primary side switches is modulated by the rectified AC voltage to result in an output rectified AC voltage, which is unfolded into an AC sinusoidal output voltage by the output full-bridge unfolding converter. | 10-25-2012 |
20120281436 | ISOLATED DC-TO-DC VOLTAGE STEP-UP CONVERTER - An isolated DC-to-DC voltage step-up converter is provided with four switches, an input inductor, an isolation transformer, two resonant inductors and two resonant capacitors and operates with two distinct intervals: ON-time interval and an OFF-time interval. The two half-wave sinusoidal resonant capacitor charge and discharge intervals, one during the ON-time interval and the other during the OFF-time interval are chosen as to eliminate the losses due to energy stored in the leakage inductance of the isolation transformer and to operates with zero voltage switching of the primary side switches. It provides the output voltage regulation over the wide input voltage range with the same low voltage stresses of all four switching devices. The isolation transformer has full bi-directional flux capability and has DC bias. Despite the two independently controlled resonances, the output voltage is controlled by the duty ratio D control at constant switching frequency. | 11-08-2012 |
Patent application number | Description | Published |
20090067483 | Efficient adaptive equalizer implementation - The present invention is related to the digital implementation of adaptive equalizers for high-speed communication systems, using finite precision arithmetic, for example, as implemented in a silicon ASIC. | 03-12-2009 |
20090067486 | Method and apparatus for joint decoding and equalization - The present invention is related to joint trellis decoding and equalization using a decision feedback equalizer. | 03-12-2009 |
20090296799 | Channel identification, emulation, and frame synchronization for digital television signals - The present invention is related to channel identification, equalizer initialization, and framing synchronization of GB 20600-2006 digital television signals. In one embodiment, the present invention provides, in a communications receiver having an equalizer that processes GB 20600-2006 digital television signals that include payload data, a method that initializes the equalizer coefficients for processing the payload data comprising: identifying a channel estimate based on correlation techniques; producing known, mock received data and filtering the mock, received data through the channel estimate to produce mock filtered data; adjusting the equalizer coefficients with the mock received data or the mock filtered data to obtain an initial equalizer setting; and processing the payload data with the initial equalizer setting. | 12-03-2009 |
20110255008 | SIMPLIFIED DATA INTERFACE PROTOCOL FOR DIGITAL TELEVISION RECEIVER - Certain embodiments of the present invention encapsulate a variety of data, for example, FIC data, together with ATSC-M/H Service data, into a single IP stream, to simplify the interface between demodulator and media processor. A single data interface protocol within the receiver can then be used, facilitating integration. | 10-20-2011 |
20120281140 | COHERENT SYNCHRONIZATION AND FRAMING IN A DIGITAL TELEVISION RECEIVER - The current application is directed to maintaining the correct number of symbols in a protocol frame in a digital communications receiver, to prevent catastrophic failure due to dynamic multipath or cycle slips. Timing recovery and framing are coherent, facilitated by placing channel estimation directly into a larger timing recovery loop. | 11-08-2012 |
20120281145 | LEAST SQUARES MATRIX COMPRESSION AND DECOMPRESSION IN A DIGITAL TELEVISION RECEIVER - The current application is directed to reducing the implementation cost of least squares (LS) channel estimation in a digital communications receiver. An inverse correlation matrix is compressed on a per-diagonal basis for low cost storage in the receiver. The inverse correlation matrix is decompressed and utilized online on a per-diagonal basis. | 11-08-2012 |
20130101010 | METHOD AND APPARATUS FOR JOINT DECODING AND EQUALIZATION - The current application is directed to joint decoding and equalization using a decision feedback equalizer. An example method to which the current application and certain of the current claims are directed uses joint trellis decoding and decision feedback equalization to efficiently estimate non-contiguous symbols using non-contiguous equalizer outputs. The estimation process uses all new possibilities of symbol values, rather than old decision feedback symbol estimates. | 04-25-2013 |
20140047497 | METHOD AND SYSTEM FOR SYMBOL-RATE-INDEPENDENT ADAPTIVE EQUALIZER INITIALIZATION - The current document is related to the equalization of digital communications signals, including GB 20600-2006 and ATSC digital television signals, and is directed to methods that initialize adaptive filters for processing payload data within equalizers. These methods may operate at a clock speed faster than the symbol transmission rate and are applicable to a multitude of digital communications standards and protocols. In certain implementations, the initialization method generates input records, from output of a pseudorandom number generator, and output records, from the output of a pseudorandom number generator and a channel estimate, that are decoupled from transmitted and received data and are used to adjust equalizer coefficients to an initialization setting suitable for processing payload data. | 02-13-2014 |
Patent application number | Description | Published |
20080200955 | Plate and Screws for Treatment of Bone Fractures - A plate for treatment of bone fractures with reduced potential contact to bone through a combination of annular recesses surrounding the screw holes at the lower, bone facing surface of the plate and transverse grooves between the holes, allows for use of locking as well as conventional bone screws. With the transverse grooves cut into the plate from the lower side, as well as from the sides, the strength of the plate at the span between the holes is lower than at the screw holes. The plate can be bent in both planes without undue deformation of the screw holes. Protection of the holes during bending is afforded by hole plugs, which may be provided pre-installed in order to reduce surgery time. Screw hole plugs may then be left in place in the holes not used for bone screws. | 08-21-2008 |
20100063589 | WEAR-REDUCING GEOMETRY OF ARTICULATIONS IN TOTAL JOINT REPLACEMENTS - The invention reduces wear in total joint articulations by modifications of the shape of either component of the kinematic pair, so as to result in an annular surface contact between the two components. Fluid trapped between the two components within the inner contour of the annular contact area is pressurized under load due to elastic deformation of the components and exuded out through inter-articular gap over the surface of contact, aiding in lubrication and reducing the wear. Reduced to practice for a total hip joint with UHMWPE-metal pair, the wear rate tested in a hip joint simulator up to five million cycles was reduced by factor seven to fifteen compared to conventionally shaped components. | 03-11-2010 |
20110248498 | GENERATING ELECTRICAL POWER UTILIZING SURFACE-LEVEL HOT AIR AS THE HEAT SOURCE, HIGH ATMOSPHERE AS THE HEAT SINK AND A MICROWAVE BEAM TO INITIATE AND CONTROL AIR UPDRAFT - The invention describes a method of generating electrical power utilizing hot surface air as the heat source, high atmosphere as the heat sink and a microwave beam aimed upward providing updraft to initiate and control the large-scale air circulation. The frequency of the microwave beam is centered at approximately 60 GHz, within the absorption band of molecular oxygen, so as to result in beam penetration to an altitude of several kilometers. The power plant comprises a high-power microwave source, e.g. a bank of gyrotrons, one or more turbine-generator sets, and—optionally—a condenser/cyclone (if on a floating platform). The plant can also provide clean water from condensation out of humid, sea level air. The plant could also be used to remove atmospheric carbon dioxide from large quantities of air. The dynamic chimney produced by the microwave beam could alternatively be deployed in conjunction with a solar heat power plants, industrial chimneys, and cooling towers of conventional power plants to increase their effective height. | 10-13-2011 |
20110249927 | RADIAL BEARINGS OF INCREASED LOAD CAPACITY AND STABILITY WITH ONE AXIALLY ASYMMETRIC BEARING COMPONENT - The invention increases load capacity and stability of radial bearings by modifying the geometry of the bearing in the transverse cross section so as to split the conventional, single contact zone into two contact zones, each preferably offset by about 45 degrees from the load axis. Depending on the application, one or the other of the paired bearing components is axially asymmetric. The needed shape can be pre-machined into a bearing component, produced by permanent deformation of an axially symmetric component, or induced by assembly into/onto housing/shaft of the rotating members. Expected gain in load bearing capacity is about 40%; dynamic stability can also be significantly improved, which is of particular interest in fluid film lubricated journal bearings. | 10-13-2011 |
20110300109 | COMPOSITIONS AND METHODS FOR TREATING CANCER - The present invention is based, in part, on our discovery of compositions and methods that can be used to systemically deplete arginine and thereby treat arginine-dependent cancers. Our studies indicate that administering a composition that depletes arginine directly to the patient's small intestine will provide effective treatment for arginine-dependent cancers. Moreover, the methods can be carried out in such a way that various sources of arginine are restricted and side effects are minimized. For example, to deplete arginine, one can not only administer an arginine-depleting enzyme directly to the intestinal lumen but can also inhibit endogenous production of arginine, reduce arginine production by intestinal bacteria and limit arginine intake. To minimize side effects, one can inhibit protein breakdown, which may occur as a compensatory mechanism, provide systemic NO from a nitric oxide donor, provide a pressor peptide, and/or provide prostacycline or an analog thereof. | 12-08-2011 |
20110319933 | SUTURE BONE ANCHOR - A bone anchor provides stable, durable anchorage of sutures used for repair of soft tissues torn, or cut, away from bones. The anchor includes a plurality of prongs angled in the direction of loading. The prongs are inserted into holes drilled in the bone. The angled nature of the prongs causes them to dig into the bone under functional loading. A suture is attached to the anchor via an integral bead and led through the anchor eyelet. In use, the suture does not glide anywhere at its interface to the anchor, nor does if flex on itself at a knot. Instead, it only flexes around the pillar of the eyelet with a fully circular cross-section. The suture is preferably of multi-filament type and the diameter of the individual filaments is preferably no more than 1% of the diameter of the eyelet's circular pillar. Filaments of the suture are preferably loose; i.e. they are not bonded or braided. This is to prevent strains in the filaments in excess of their fatigue limit when flexing around the pillar of the anchor. | 12-29-2011 |
20110319945 | LATERAL SUTURE SCREW - A bone screw for lateral suture stabilization includes a post around which the suture winds. An attachment hole is located in the head of the bone screw above the post for connecting an end of the suture. Various suture configurations can be used around multiple bone screws in the lateral suture stabilization process to control the flexion of the suture upon movement of the joint. The suture is formed from a plurality of high strength high modulus polymeric fibers. The fibers are independent and free from intrinsic inter-fiber shear coupling found in braided or bonded fibers. | 12-29-2011 |
20110319994 | ACL PROSTHESIS AND ANCHOR THEREFOR - An interarticular ligament prosthesis is formed from a plurality of high strength high modulus polymeric fibers. The fibers are independent and free from intrinsic inter-fiber shear coupling found in braided or bonded fibers. The ligament prosthesis is installed with tubular, bone screw anchors. The fibers of the ligament prosthesis pass through the central hole of the anchors and are knotted at one end. The exit holes of the anchors include ceramic eyelets with polished edges. The edges are rounded to a defined radius for desired fatigue life of the prosthesis. | 12-29-2011 |
20120035671 | Internal Joint Bracing System and Suture Anchoring Assembly Therefore - An internal bracing system is disclosed for stabilizing a joint such as the knee, shoulder, ankle or the like. The internal bracing system includes an extra-articular tension band mechanism and an anchor assembly therefore. The internal bracing system adds substantial control to unstable joints which is effective in limiting the pathological joint motions and internal slippage. The anchor anchoring assembly designed to affix a tethering device to various bony structures which form a joint, for the purpose of providing stability. The anchor assembly includes an anchor and a set screw. A double helix thread/chamber structure between the anchor and set screw securely holds the tether without binding. | 02-09-2012 |
20120116451 | SUTURE ATTACHMENT METHOD AND APPARATUS - A bone anchor has a central bore allowing for uniquely attaching a suture thereto. The bore is shaped so that it is wider at the bottom of the anchor than at the top of the anchor. A peg fits within the bore. The suture is looped around the peg and the peg is inserted into the bore. Friction between the bore, peg and suture holds the suture in place. A suture for use with the bone anchor may be formed by fusing together the ends of a plurality of fibers to form a loop. | 05-10-2012 |
20120136450 | ELBOW JOINT PROSTHESIS AND METHOD FOR IMPLANTATION - A modular elbow prosthesis is disclosed, as well as a surgical approach and implantation technique, for using the prosthesis. The system is the first and only to allow for a, Biomechanically Anatomical, Nonconstrained, Compartmental (BANC) Elbow Arthroplasty. The modularity of the system allows it to be implanted as an unicompartmental or partial elbow replacement or a total elbow replacement. The modular elbow prosthesis for partial elbow replacement includes a cylindrical medial humeral component, a polyethylene ring thereon, and a semicircular medial ulnar component which mates with the polyethylene ring. Additionally, for total elbow replacement, the modular elbow prosthesis also includes a circular lateral humeral component, a polyethylene ring thereon, a semicircular lateral ulnar component, and a radial component. Implantation of the prosthesis is through a minimally invasive medial surgical approach with the aid of precision biomechanical guides. The application is well suited for canines, other quadrupeds, and people. | 05-31-2012 |
20120209395 | TROCHLEAR GROOVE PROSTHESIS - A trochlear groove prosthesis includes a base plate and cap. The base plate and cap are shaped to correspond to the shape of the trochlear groove. A cut is made in the femur to remove the worn or damaged trochlear groove. The base plate is attached to the cut portion of the femur. The cap is mated with the base plate. The prosthesis and procedure provide a properly shaped prosthesis with a single planar cut of the femur. | 08-16-2012 |
20130060345 | PARTIAL HIP PROSTHESIS - The invention reduces friction and wear in partial hip prosthesis by combining optimized geometry of the articulation and surface treatment of the prosthetic component. The acetabulum is reamed to the bone. One of the articulating surfaces—either that of the reamed acetabulum, or that of the femoral head prosthesis is a-spherical so that a fluid-filled gap is formed at the area of major load transfer. The fluid-filled gap is sealed by an annular area of contact, over which the concave and the convex components are congruent. The preferred surface treatment is by diamond-like coating, which results in very low coefficient of friction and high abrasion resistance against the bone. The prosthetic head is fixed to the femur by either a conventional stem, a perforated shell, or a femoral neck prosthesis screwed onto the femur so that it is partially covered by bone and partially exposed on the medial-inferior aspect, where it abuts the reamed cortex of the calcar region. | 03-07-2013 |
20130066367 | SUTURE BONE ANCHOR - A bone anchor provides stable, durable anchorage of sutures used for repair of soft tissues torn, or cut, away from bones. The anchor includes a plurality of prongs angled in the direction of loading. The prongs-are inserted into holes drilled in the bone. The angled nature of the prongs causes them to dig into the bone under functional loading. A suture is attached to the anchor via an integral bead and led through the anchor eyelet. In use, the suture does not glide anywhere at its interface to the anchor, nor does if flex on itself at a knot. Instead, it only flexes around the pillar of the eyelet with a fully circular cross-section. | 03-14-2013 |
20130096693 | WEAR-REDUCING GEOMETRY OF ARTICULATIONS IN TOTAL JOINT REPLACMENTS - The invention reduces wear in total joint articulations by modifications of the shape of either component of the kinematic pair, so as to result in an annular surface contact between the two components. Fluid trapped between the two components within the inner contour of the annular contact area is pressurized under load due to elastic deformation of the components and exuded out through inter-articular gap over the surface of contact, aiding in lubrication and reducing the wear. Reduced to practice for a total hip joint with UHMWPE-metal pair, the wear rate tested in a hip joint simulator up to five million cycles was reduced by factor seven to fifteen compared to conventionally shaped components. | 04-18-2013 |
20130190886 | PATELLAR LIGAMENT SPACER FOR ACL INJURIES - A method and implant to treat anterior cruciate ligament (ACL) injuries are disclosed. The method involves advancing the insertion of the patellar ligament to the proximal tibia. The implant includes a spacer ( | 07-25-2013 |
20130229015 | GENERATING ELECTRICAL POWER UTILIZING SURFACE-LEVEL HOT AIR AS THE HEAT SOURCE, HIGH ATMOSPHERE AS THE HEAT SINK AND A MICROWAVE BEAM TO INITIATE AND CONTROL AIR UPDRAFT - The invention describes a method of generating electrical power utilizing hot surface air as the heat source, high atmosphere as the heat sink and a microwave beam aimed upward providing updraft to initiate and control the large-scale air circulation. The frequency of the microwave beam is centered at approximately 60 GHz, within the absorption band of molecular oxygen, so as to result in beam penetration to an altitude of several kilometers. The power plant comprises a high-power microwave source, e.g. a bank of gyrotrons, one or more turbine-generator sets, and—optionally—a condenser/cyclone (if on a floating platform). The plant can also provide clean water from condensation out of humid, sea level air. The plant could also be used to remove atmospheric carbon dioxide from large quantities of air. The dynamic chimney produced by the microwave beam could alternatively be deployed in conjunction with a solar heat power plants, industrial chimneys, and cooling towers of conventional power plants to increase their effective height. | 09-05-2013 |
20140102115 | TURBO-ENGINE, PARTICULARLY INTERNAL COMBUSTION ENGINE - The invention is directed to a turbo-engine, particularly internal combustion engine, comprising a housing and therein a bladeless turbine section ( | 04-17-2014 |
20140243977 | Prosthetic System for Orthopedic Repair - The present invention features systems for orthopedic repair of, for example, a joint. The present systems deviate from conventional systems by virtue of combining a finer prosthetic ligament with a robust anchor. The relationship between these components and their various features are described herein and result in joint reconstruction in human and veterinary settings that is less likely to fail over time. | 08-28-2014 |
20150051707 | Wear-Reducing Ring for Articulations in Total Joint Replacements - The articulating joint prostheses of the invention demonstrate reduced wear and can include a cup ( | 02-19-2015 |