Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
178 results about "Internal feedback" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
LED array package with internal feedback and control
ActiveUS7252408B2Electric circuit arrangementsLighting heating/cooling arrangementsDriver circuitElectricity
A packaged LED array for high temperature operation comprises a metal base, the metal base including an underlying thermal connection pad. One or more layers of ceramic overly the metal base. The array includes a plurality of LED dice, each LED die having electrodes. And, the LED thermally coupled to the metal base. A driver circuit is electrically connected to the LED die electrodes and controls the LED array current. An LED driver is mounted within the LED array package, and thermally coupled to the metal base. In a second embodiment, one or more of the LED dice can be switched from the driver to a measurement circuit and used as a photodetector to measure the light output of the LED array. The measured photodetector signal can further be used as a feedback signal to control the LED array light output.
Owner:LIGHTING SCI GROUP
Hearing aid circuit reducing feedback
A hearing aid circuit includes a correlation detector that detects correlation at a feedforward path input and that provides a correlation output to a phase shifter. The phase shifter introduces a phase shift along a feedforward path. A phase measurement circuit measures a phase shift at a feedforward path input, and provides a phase measurement output to an internal feedback processor. The internal feedback processor adjusts internal feedback as a function of the phase measurement to suppress coupling of external audio feedback along the feedforward path.
Owner:INTRICON INC
Skin permeation device for analyte sensing or transdermal drug delivery
Devices, systems, kits and methods for increasing the skin's permeability controlled by measured skin electrical parameter are described herein. They may be used for transdermal drug delivery and / or analyte extraction or measurement. The controlled abrasion device contains (i) a hand piece, (ii) an abrasive tip, (iii) a feedback control mechanism, (iv) two or more electrodes, and (v) an electrical motor. The feedback control mechanism may be an internal feedback control mechanism or an external feedback control. The kit contains the controlled abrasion-device, one or more abrasive tips, optionally with a wetting fluid. The method for increasing the skin's permeability requires applying the controlled abrasion device to a portion of the skin's surface for a short period of time, until the desired level of permeability is reached. Then the abrasion device is removed, and a drug delivery composition or device or an analyte sensor is applied to the treated site.
Owner:ECHO THERAPEUTICS INC
High dynamic range imager circuit and method for reading high dynamic range image
ActiveUS20120256077A1Improve dynamic rangeTransistorTelevision system detailsCapacitanceHigh-dynamic-range imaging
The present invention discloses a high dynamic range imager circuit and a method for reading high dynamic range image with an adaptive conversion gain. The high dynamic range image circuit includes a variable capacitor. The capacitance of the variable capacitor is adjusted according to sensed light intensity or by internal feedback control, to adaptively adjust the conversion gain of the high dynamic range image circuit as it reads a signal which relates to a pixel image sensed by an image sensor device. In each cycle, the signal can be read twice or more with different dynamic ranges, to enhance the accuracy of the signal.
Owner:SK HYNIX INC
Engine control and catalyst monitoring with downstream exhaust gas sensors
InactiveUS6904751B2Low costSaving weightElectrical controlInternal combustion piston enginesIntegratorExhaust fumes
A system and method for controlling an internal combustion engine for low emissions include an inner feedback control loop to control the engine fuel / air ratio with feedback provided by a first exhaust gas sensor and an outer feedback control loop that modifies a reference fuel / air ratio provided to the inner feedback control loop based on feedback signals provided by a second exhaust gas sensor positioned downstream relative to a portion of the catalyst and a third exhaust gas sensor positioned downstream relative to the second exhaust gas sensor. Catalyst gains are determined by modeling the catalyst as an integrator with an unknown gain and estimating the catalyst gain based on the exhaust gas sensors with the gain used to monitor catalyst performance and / or modify the engine fuel / air ratio.
Owner:FORD GLOBAL TECH LLC
Combined microphone and receiver assembly for extended wear canal hearing devices
ActiveUS20090074220A1Place safeMinimize feedbackCompletely in canal hearing aidsEar supported setsCouplingHearing apparatus
An ultra miniature hearing device for extended wear entirely in the ear canal past the cartilaginous region is provided. The hearing device comprises a microphone and a speaker, each having a respective diaphragm. The speaker and microphone are placed parallel to each other in a single lateral assembly. The microphone and speaker can be arranged such that their diaphragms are orthogonal to one another so that cross coupling of vibrations is minimized, thus reducing internal feedback. Due to the parallel co-placement of the speaker and microphone in the single lateral assembly, the length of the device is substantially shorter than that of prior hearing aid devices. The hearing device is 12 mm or less in length to fit in the bony part of the ear canal for most individuals and is placed within approximately 3 mm from the eardrum.
Owner:INSOUND MEDICAL INC
Percutaneous closed-loop control charging device for implantation type medical treatment instrument
ActiveCN101980412AReduce adverse effectsRelieve painBatteries circuit arrangementsElectric powerExternal energyClosed loop
The invention discloses a percutaneous closed-loop control charging device for implantation type medical treatment instrument and belongs to the technical field of implantation medical instrument. The percutaneous closed-loop control charging device for implantation type medical treatment instrument comprises an external charger and an internal implantation type medical instrument. An external energy transmitting coil is a large-size flat magnetic core coil, and an internal energy receiving coil is a hollow coil; the external energy transmitting coil transmits electromagnetic energy by adopting a resonance electromagnetic coupling manner with parallel central shafts; and the electrical energy obtained by the internal energy receiving coil charges an internal rechargeable battery through an internal charge control circuit. The closed-loop control charging device communicates in a pulse position modulation manner for closed-loop control to ensure the energy received by the implantation medical instrument in different charging phases to be within the normal range, effectively control the heating and increase the safety; the closed-loop control charging device calculates the efficiency by the internal feedback parameter to realize counterpoint prompt and increase the charging efficiency. The percutaneous wireless charging method can charge the implantation type medical instrument by a titanium casing, is safe and reliable in charging, and can be applied to all types of implantation type medical instruments equivalent to a deep brain stimulator in power level.
Owner:TSINGHUA UNIV +1
Stability recovery for an on-frequency RF repeater with adaptive echo cancellation
ActiveUS20080113617A1Improved stability recoveryCancel echoTwo-way loud-speaking telephone systemsTransmission control/equalisingEngineeringWireless repeater
A wireless repeater includes an internal feedback path for adaptively cancelling an echo between an output antenna and an input antenna. The internal feedback path employs an adaptive algorithm implementing a list having a plurality of list elements. Each list element has one or more echo cancellation parameters and one or more repeater settings. The list may be pruned by employing a minimum distance between elements within the list. A method for stabilizing a wireless repeater includes obtaining an autocorrelation of a signal in a signal path of the repeater, detecting an echo in the signal path based on the autocorrelation, providing a list of elements indicating past successful echo cancellation coefficients and associated repeater settings, and adaptively adjusting an error of the echo cancellation coefficients to cancel the echo in the signal path.
Owner:INTEL CORP
Stable adaptive filter and method
Stable adaptive filter and method are disclosed. The invention solves a problem of instability associated with Fast Affine Projection adaptive filters caused by error accumulation in an inversion process of an auto-correlation matrix. The Stable FAP uses a simplification of setting a normalized step size close to unity and reduces a problem of the matrix inversion to solving a system of linear equations whose solution coincides with a first column of the inverse auto-correlation matrix. The system of linear equations is then solved by one of descending iterative methods which provide inherent stability of operation due to intrinsic feedback adjustment. As a result, inevitable numerical errors are not accumulated, being corrected as the process goes on. In first and second embodiments of the invention the system of linear equation is solved by steepest descent and conjugate gradient methods respectively. Being immune to numerical errors, the invented method and filter are suitable for various DSP platforms, e.g., 16 and 24 bit fixed-point as well as floating point platform.
Owner:CIENA
Beam steering element and associated methods for manifold fiberoptic switches and monitoring
An optical system comprising two or more optical switches co-packaged together comprising discrete sets of input fiber ports (N per set) and an output fiber port (1 per set), and wherein λn from said set of multiple input fiber ports (N) is focused on λn mirror via the use of shared free space optics, wherein at least a first array of MEMS mirrors is utilized to select and switch selected wavelengths from the first set of input fiber ports (N) to an output fiber port of the same set, and wherein at least a second array of MEMS mirrors using and sharing the same free space optics is utilized to select individual wavelengths or spectral components from its input fiber ports to send to its output fiber port for optical power or other monitoring purposes, thus, enabling an N×1, or alternatively a 1×N switch capable of internal feedback monitoring.
Owner:LUMENTUM OPERATIONS LLC
Fuel/air ratio feedback control with catalyst gain estimation for an internal combustion engine
ActiveUS7000379B2Low costSaving weightElectrical controlInternal combustion piston enginesIntegratorFeedback control
A system and method for controlling an internal combustion engine for low emissions include an inner feedback control loop to control the engine fuel / air ratio with feedback provided by a first exhaust gas sensor and an outer feedback control loop that modifies the fuel / air ratio reference provided to the inner feedback control loop based on feedback signals provided by the first exhaust gas sensor and a second exhaust gas sensor. The fuel / air ratio reference signal controller adapts to the oxygen storage capacity of the catalyst by modeling the catalyst as an integrator with an unknown gain and estimating the catalyst gain based on the first and second exhaust gas sensor signals. Using the estimated catalyst gain, an adaptive controller gain factor is determined and subsequently used to determine the fuel / air ratio reference signal provided to the fuel / air ratio controller of the inner feedback control loop.
Owner:FORD GLOBAL TECH LLC
Hearing aid circuit reducing feedback
Owner:INTRICON INC
LED array package with internal feedback and control
A packaged LED array for high temperature operation comprises a metal base, the metal base including an underlying thermal connection pad. One or more layers of ceramic overly the metal base. The array includes a plurality of LED die, each LED die having electrodes. And, the LED thermally coupled to the metal base. A driver circuit is electrically connected to the LED die electrodes and controls the LED array current. An LED driver is mounted within the LED array package, and thermally coupled to the metal base. In a second embodiment, one or more of the LED die can be switched from the driver to a measurement circuit and used as a photodetector to measure the light output of the LED array. The measured photodetector signal can further be used as a feedback signal to control the LED array light output.
Owner:LIGHTING SCI GROUP
Skin permeation device for analyte sensing or transdermal drug delivery
Devices, systems, kits and methods for increasing the skin's permeability controlled by measured skin electrical parameter are described herein. They may be used for transdermal drug delivery and / or analyte extraction or measurement. The controlled abrasion device contains (i) a hand piece, (ii) an abrasive tip, (iii) a feedback control mechanism, (iv) two or more electrodes, and (v) an electrical motor. The feedback control mechanism may be an internal feedback control mechanism or an external feedback control. The kit contains the controlled abrasion-device, one or more abrasive tips, optionally with a wetting fluid. The method for increasing the skin's permeability requires applying the controlled abrasion device to a portion of the skin's surface for a short period of time, until the desired level of permeability is reached. Then the abrasion device is removed, and a drug delivery composition or device or an analyte sensor is applied to the treated site.
Owner:ECHO THERAPEUTICS INC
Engine valve actuation control and method
InactiveUS6966285B1Precise engine valve liftPrecise seating velocityOperating means/releasing devices for valvesServomotor componentsValve actuatorEngineering
A valve actuator control monitors engine valve trajectory, lift and seating velocity and varies the timing of internal feedback control channels to correct for engine valve positioning errors to achieve precise engine valve lift, closing timing and desired seating velocity.
Owner:GM GLOBAL TECH OPERATIONS LLC
LED drive circuit for PFM/PWM bimodal switch light modulation
InactiveCN101466187AImprove efficiencyRealize the mergerElectric light circuit arrangementControl signalDual mode
The invention discloses a PFM / PWM dual-mode switching light-adjusting LBD driving circuit, which comprises a voltage reference module, and a dual-mode switching light-adjusting module, a constant voltage module and a driving module which are respectively connected with the voltage reference module; the voltage reference module is used for supplying power for each module and generating the voltage references in each module; the dual-mode switching light-adjusting module is used for generating the adjustable or the dutyfactor-adjusting square signals to control the constant voltage module according to the outer signal variation; the constant voltage module is used for generating the voltage to control the driving force of the driving module, and utilizing the internal feedback structure to ensure the stability of the voltage value; and the driving module is used for generating the constant driving current with the big enough peak value to satisfy the LBD lightening. The LBD driving circuit can supply the brightness adjusting function the same as the PWM light adjusting, and can switch to the PFM pattern under the low brightness condition at the same time, so as to effectively improve the whole efficiency of the driving circuit.
Owner:XIAN JIEHANG ELECTRONICS SCI & TECH CO LTD
Pacemaker for treating physiological system dysfunction
InactiveUS20090264952A1Avoid seizuresEffective preventionElectroencephalographyElectrotherapyCardiac pacemaker electrodeMedicine
Disclosed is a device and method for preventing seizures due to physiological system dysfunction. The method is based on a conjectural model of the brain wherein each brain site is modeled as a chaotic oscillator; a normal brain generates an internal feedback signal to prevent long-term entrainment among the oscillators; and a pathological brain fails to provide this feedback signal. The device of the present invention measures and characterizes the brain sites to determine if entrainment is occurring among the oscillators, derives an appropriate feedback signal to counteract the entrainment, and applies the feedback signal to the critical brain sites. The feedback signal generated by the device supplements or takes the place of the feedback signal that would otherwise be generated by the normal brain.
Owner:ARIZONA STATE UNIVERSITY
Adaptive echo cancellation for an on-frequency RF repeater using a weighted power spectrum
ActiveUS20080176513A1Preserve echo rippleReduce widthTransmission monitoringRadio relay systemsAudio power amplifierEngineering
A wireless repeater includes an input antenna for receiving an input signal, an output antenna for outputting an amplified signal, and an amplifier for amplifying the received input signal and providing the output amplified signal to the output antenna. Radiated coupling between the input and output antennas causes echoes to be transmitted by the repeater. A filter is used for applying a weighting function to a power spectrum of a measured signal in the wireless repeater thereby obtaining a weighted power spectrum of the measured signal. An internal feedback path is employed for adaptively canceling the echo by implementing an adaptive algorithm based on a autocorrelation of the input signal employing the weighted power spectrum of the measured signal.
Owner:INTEL CORP
Apparatus and methods for a human extender
A human extender controller for interface between a human operator and a physical object through a physical plant. The human extender controller uses an inner-feedback loop to increase the equivalent damping of the operating system to stabilize the system when it contacts with the environment and reduces the impact of the environment variation by utilizing a high feedback gain, determined by a root locus sketch. Because the stability of the human extender controller of the present invention is greatly enhanced over that of the prior art, the present invention is able to achieve a force reflection ratio 500 to 1 and capable of handling loads above the two (2) ton range.
Owner:LOCKHEED MARTIN ENERGY SYST INC
Bootstrapped low-voltage switch
A low-voltage constant-impedance analog switch based on a single MOSFET [328] as the main switching element. The constant-impedance on-state operation is obtained by connecting a charged capacitor [326] between the gate and source terminals of the MOSFET [328]. The switch can be compensated for the body effect, which may be necessary to obtain the required level of linearity. Low-voltage operation is made feasible by employing an internal feedback loop that locks in the switch's on-state. The switch can be implemented in a single-well CMOS bulk technology, and it can operate at supply-voltage differences that are only slightly higher than the technology's threshold voltage.
Owner:ANALOG DEVICES BV
Skin Permeation Device for Analyte Sensing or Transdermal Drug Delivery
InactiveUS20130137951A1Improve breathabilityElectrotherapyMedical devicesSkin integritySkin penetration
Owner:ECHO THERAPEUTICS INC
Adjustable feedback for CMOS latches
An improved latch circuit having a dynamically adjustable internal feedback level. The improved latch circuit includes a latch inverter and a feedback inverter cross-coupled with the latch inverter. A controllable supplemental feedback inverter is connected in parallel with the feedback inverter to provide a controllable level of feedback to the latch inverter. An independently selectable control signal enables or disables the controllable feedback inverter in conformity with a need for more or less feedback, such that the internal feedback level may provide optimal functionality and performance of the latch circuit.
Owner:IBM CORP
Method and apparatus for automatic synthesis of controllers
InactiveUS7117186B2Computer controlAnalogue computers for electric apparatusTime domainState variable
A general automated method for synthesizing the design of both the topology and parameter values for controllers is described. The automated method automatically makes decisions concerning the total number of signal processing blocks to be employed in the controller, the type of each signal processing block, the topological interconnections between the signal processing blocks, the values of all parameters for the signal processing blocks, and the existence, if any, of internal feedback between the signal processing blocks within the controller. The general automated method can simultaneously optimize prespecified performance metrics (such as minimizing the time required to bring the plant outputs to the desired values as measured by the integral of the time-weighted absolute error or the integral of the squared error), satisfy time-domain constraints (such as overshoot, disturbance rejection, limits on control variables, and limits on state variables), and satisfy frequency domain constraints (bandwidth).
Owner:KOZA JOHN R
Pressure control valve having intrinsic feedback system
A method and system for controlling the dynamics of an actuatable load operable within a servo or servo-type system, wherein the dynamics of the load are controlled by way of a unique pressure control valve configured to provide intrinsic pressure regulation, thus eliminating the need for electronically or mechanically user controlled systems. The pressure control valve, which may be referred to as a dynamic pressure regulator, utilizes dual spools that are physically independent of one another and freely supported in the valve body to regulate the pressures acting within the overall system between the control or pilot pressure and the load or load pressure. The dual spools function in cooperation with one another to maintain a state of equilibrium in the system, namely to keep pressure acting on or within the actuator (the load pressure), or the feedback pressure corresponding to the load pressure, the same as the pilot pressure.
Owner:SARCOS LC
High-dynamic range image sensing circuit and high-dynamic range image reading method
ActiveCN102752559AAdjust Capacitor ValueEasy to understand technical contentTelevision system detailsColor television detailsCapacitanceComputer science
The invention provides a high-dynamic range image sensing circuit with adaptive conversion gain and a high-dynamic range image reading method. The high-dynamic range image sensing circuit comprises a variable capacitor. The capacitance value of the variable capacitor is adjusted according to sensed lightness or internal feedback control so as to adaptively adjust the conversion gain when a signal representing a pixel image sensed by an image sensing element is read. When signals are read per period, the signals within different dynamic ranges can be respectively read for more than two times so as to enhance the accuracy of the signals.
Owner:PIXART IMAGING INC
Current-mode DC-to-DC-converter
A current-mode DC-to-DC converter operating in a high frequency is disclosed. The current-mode DC-to-DC converter includes an inductor, a power switch, an oscillator, an adder without internal feedback loop, an error amplifier, a comparator, a compensation unit and a driver. The adder adds a ramp signal from the oscillator directly to a voltage signal relative to a current flowing through the power switch and generates a sum signal based upon match between internal components in the oscillator and the adder.
Owner:O2 MICRO INT LTD
Implanted type self-adaptive wireless electric energy transmission system
The invention discloses an implantable self-adaptive wireless power transmission system, which includes an external energy transmission module, an internal energy collection module and an adaptive feedback loop; the external energy transmission module includes a power amplification circuit, a signal source and a drive, and a transmission coil ; The power amplifying circuit adopts Class D, and is a voltage switch type; the self-adaptive feedback loop mainly includes in vivo information collection, in vivo and in vitro wireless communication, and in vitro energy control; the entire feedback structure is composed of two loops of in vivo feedback and system feedback circuit structure; the energy harvesting module in the body includes a receiving coil, a coupling capacitor, a full-wave rectification filter, a PWM modulation module, and an LSK modulation circuit. The invention proposes an implantable self-adaptive wireless power transmission system, which can not only meet the uninterrupted power supply requirements of implanted devices, but also make the energy transmission controllable and avoid excessive energy transmission.
Owner:TONGCHENG SINBON ELECTRONICS
Electro-hydraulic engine valve actuation
InactiveUS7040266B1Improves system controllabilityImprove energy consumptionMachines/enginesNon-mechanical valveElectricityControl flow
Electro-hydraulic engine valve actuation system providing an actuator and an actuator control system. The actuator includes primary and secondary actuation chambers, defined by a piston, connected to the engine valve, and characterized by increasing and correspondingly decreasing chamber volumes, as the piston is urged away from neutral position. A fluid inlet is connected to a flow control valve. A control valve includes an actuator, and has flow states for controlling flow between two fluid inlets and a fluid outlet. The control valve includes first and second opposed, control chambers, each connected to the actuator. There is a spring in the second control chamber. The actuator of the flow control valve is controlled to a first and second state, and there is an electrically uncontrolled third flow state. There is a pair of temperature-compensated orifices which create internal feedback, with the control chambers, between the engine valve motion and the control valve position.
Owner:GM GLOBAL TECH OPERATIONS LLC
Internal-feedback-type terahertz traveling wave tube oscillator
InactiveCN103021770AReduce volumeIncrease powerTransit-tube circuit elementsTransit-tube coupling devicesWave structurePhase shifted
The invention discloses an internal-feedback-type terahertz traveling wave tube oscillator, and relates to a terahertz electromagnetic wave source technique. Based on a traveling wave tube, a feedback mechanism is introduced so as to form an oscillator. Compared with the existing traveling wave tube, the structure is characterized in that 1. a tuning device is added at an input port of the oscillator, and is a variable short circuit device; and 2. an output port is designed with a special method, so that the oscillator has certain reflection in a working frequency band, and the reflection coefficient is about 0.2. According to the oscillator provided by the invention, a feedback loop of an electromagnetic wave is introduced into the structure, the phase shift of the electromagnetic wave through the feedback loop is integral multiples of 2*pi, and under the condition that a slow wave structure provides sufficient gain, the device is oscillated, and one or a plurality of electromagnetic waves with specific frequency is / are output. Because the tuning device can introduce phase shift variations through methods of mechanical tuning and the like in the feedback loop, the frequency of a start oscillation electromagnetic wave also varies to meet the condition that the total phase shift of the feedback loop is integral multiples of 2*pi, so that the tunable characteristic is realized.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Internal feedback digital servo hydraulic cylinder
ActiveCN103148047ARealize closed-loop digital controlGain is easy to adjustFluid-pressure actuatorsHydraulic cylinderClosed loop
The invention relates to an internal feedback digital servo hydraulic cylinder, which belongs to the field of digital hydraulic technology and aims to solve the problems of inaccurate control and difficulty in gain adjustment of an electrohydraulic servo system. The internal feedback digital servo hydraulic cylinder comprises motors, a slide valve, a hydraulic cylinder, a magnetostrictive displacement sensor, an oil path integrated block, a supporting plate and the like. A valve core of the slide valve is driven and controlled by a first motor; a feedback turnbuckle of the slide valve is driven and controlled by a second motor; a hydraulic cylinder displacement signal is fed back to a driver corresponding to the second motor by the magnetostrictive displacement sensor; the second motor is controlled to operate by the driver; and closed-loop digital control over the hydraulic cylinder displacement is realized by controlling relative motion of the feedback turnbuckle and the valve core. The internal feedback digital servo hydraulic cylinder has the advantages of simple structure, high control accuracy, small vibration and high stability, and is suitable for working places with long-stroke and large-thrust hydraulic cylinder.
Owner:来宾市计量测试研究所
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com