71 results about "Back coupling" patented technology

A convertible cargo carrier for offering a traveler the advantages of both pulling and pushing systems for use in conveying objects during their travels. The apparatus includes a cargo platform having a base, and a back coupled to the base; a motive structure coupled to the base for moveably supporting the cargo platform above a surface; a handle, coupled to the back, and a rack member, moveably and extendably coupled to the base, including one or more rack motive elements, the rack member including a first mode for engaging the surface with the one or more rack motive elements and a second mode with the one or more rack motive elements disengaged from the surface, the rack member presenting a platform adjacent the cargo platform when in the first mode.

The invention relates to gain calibration in a transceiver unit (100) having a transmitter unit and a receiver unit and a feed back coupling (165) between these. A signal level measurement unit (163) measures signal levels of a feedback signal through either the receiver unit or through a signal level detector (167). A reference signal level of the feedback signal is set by adjusting the transmitter until the signal level measurement unit (163) measures a predefined value when connected through the signal level detector (167). An absolute value of the transmitter gain is then calibrated. The signal level measurement unit (163) is connected through the receiver unit and the absolute gain of the receiver is calibrated. A gain is changed either in the receiver or the transmitter unit. The relative signal level change of the feedback signal is measured and used to calibrate the gain step.

The invention provides a superconducting nanowire single photon detector based on a deep silicon etching process and a preparation method. The detector comprises an SOI base which is composed of a back substrate, a buried oxygen layer and top silicon in sequence from bottom to top, a first anti-reflection layer which is disposed on the surface of the top silicon, a second anti-reflection layer which is disposed on the surface of the back substrate, a deep groove which penetrates through the second anti-reflection layer, the back substrate and the buried oxygen layer, an optical cavity structure which is disposed on the surface of the first anti-reflection layer, superconducting nanowires which are disposed between the first anti-reflection layer and the optical cavity structure, and a mirror which is disposed on the surface of the optical cavity structure. By etching the deep groove on the substrate, the distance between a coupling optical fiber and the device is narrowed, the use of a long-focus lens in the traditional back-coupling superconducting nanowire single photon detector is avoided, and alignment coupling between the MU head of an optical fiber and the device is facilitated. The problem concerning long-distance focusing in the optical cavity structure and the influence of the Fabry-Perot cavity of the susbtrate on the absorption efficiency are avoided. The absorption efficiency of target wavelength is improved. The detection efficiency of the device is improved.

One kind of switchable active / semi-active suspension system for vehicle superior to available ones, which have complicated structure, lower reliability and strict operation conditions, is provided. The electronically controlled switchable active / semi-active suspension system for vehicle includes mainly a hydraulic cylinder and a spring connected to the vehicle frame and axle separately, a hydraulic motor connected via pipeline to the hydraulic cylinder, a DC motor connected through a back coupling to the hydraulic cylinder, an accumulator connected to the DC motor, and a controller installed between the motor and the accumulator. The electronically controlled switchable active / semi-active suspension system has simple structure, high reliability, wide operation range, the functions of both active suspension and semi-active suspension, and wide application foreground.

The invention belongs to the photoelectronic technical field, characterized in that: it adopts electron beam exposure and dry-etching process to form a photon crystal double-waveguide structure on semiconductor, where the two ends of the photon crystal waveguide are connected with light guide connection light waveguides and it removes part of the sacrificial layer by wet etching process to form a bridge support structure. By reverse coupling action of the photon crystal double waveguide, the light of evenly symmetric transmission mode cross over frequency can be reversely coupled from straight-through waveguide into coupling waveguide so as to cause the transmission spectrum of the straight-through waveguide has obvious hollows. When the detected fluid fills periodical holes of photon crystal or upper and lower spaces of the photon crystal layer, dispersion characteristic of the transmission mode in the photon crystal double waveguide is changed, or changed by external force, which can cause variation of evenly symmetric transmission mode cross over frequency so as to cause variation of transmission spectrum of the straight-through waveguide, thus implementing microflow refractivity detection and sensing of high sensitivity and integrated photon crystal structure.

The present invention includes apparatus and method for a convertible cargo carrier for offering a traveler the advantages of both pulling and pushing systems for use in conveying objects during their travels. The apparatus includes a cargo platform having a base, and a back coupled to the base; a motive structure coupled to the base for moveably supporting the cargo platform above a surface; a handle, coupled to the back, and a rack member, moveably and extendably coupled to the base, including one or more rack motive elements, the rack member including a first mode for engaging the surface with the one or more rack motive elements and a second mode with the one or more rack motive elements disengaged from the surface, the rack member presenting a platform adjacent the cargo platform when in the first mode.

A task chair with a chair base, a pivoting mechanism housing supported by the chair base, a non-pivoting seat bottom, and a pivoting seat back coupled to the pivoting mechanism housing. The seat bottom can have a rigid seat pan that underlies a flexible seat insert and a seat cushion. The seat pan, the seat insert, and the seat cushion can be matingly engaged. A seat back frame can retain a panel of elastomeric material, and lumbar supports can be slidably retained by the seat back frame. The lumbar supports can be flexible to adjust to contoured support rails and can be fixed at selected locations along the rails. The lumbar supports can have non-symmetrical, contoured surfaces and shapes and can be nondestructively removable and exchangeable. Adjustable arm structures with upper and lower arm members can be raised and lowered by operation of an actuation trigger.

A carry system or a medical ceiling support for carrying or supporting medical-technical devices in a hospital treatment room. The ceiling support is provided with at least one extension or arm arranged substantially horizontally and at least one supporting column; at least one pivot joint and / or at least one lifting and lowering device; a support head mounted at the extension or arm for reception of the medical-technical devices; and an operating aid with at least one operating element for releasing or operating a respective brake in the at least one pivot joint or for operating the at least one lifting and lowering device. The ceiling support is arranged for generation of a feedback or back coupling which identifies or characterizes the respective brake or lifting and lowering device operated by the operating aid for a user locally at the support.

The invention discloses an add / drop filter based on an antisymmetric multimode Bragg waveguide grating. When TE light is input from a single-mode input waveguide, a drop asymmetric Y-branch waveguide converts the TE light into a TE fundamental mode of a multimode waveguide; the antisymmetric Bragg waveguide grating carries out back-coupling on the incident light meeting phase matching condition wavelength to form reflected light; the reflected light is converted into a TE mode of a drop single-mode waveguide when passing through the drop asymmetric Y-branch waveguide, and the TE mode is output from the drop end; transmission light passes through an add asymmetric Y-branch waveguide and is output from a single-mode output waveguide; similarly, add light is input from an add single-mode input waveguide; the add asymmetric Y-branch waveguide converts the add light into a TE first-order mode of the multimode waveguide; and the antisymmetric Bragg waveguide grating enables the reflected light meeting the phase matching condition wavelength to be converted into a TE mode of the single-mode output waveguide when the reflected light passes through the add asymmetric Y-branch waveguide, and the TE mode is output from the output end. The add / drop filter realizes signal adding / dropping function, and can be applied to an on-chip super-integrated optical interconnection system.

An SRAM-type memory cell that includes a semiconductor on insulator substrate having a thin film of semiconductor material separated from a base substrate by an insulating layer; and six transistors such as two access transistors, two conduction transistors and two charge transistors arranged so as to form with the conduction transistors two back-coupled inverters. Each of the transistors has a back control gate formed in the base substrate below the channel and able to be biased in order to modulate the threshold voltage of the transistor, with a first back gate line connecting the back control gates of the access transistors to a first potential and a second back gate line connecting the back control gates of the conduction transistors and charge transistors to a second potential. The first and second potentials can be modulated according to the type of cell control operation.

The invention relates to a wide-band electric small-size directional coupler, and belongs to the technical field of radio-frequency circuits. The directional coupler comprises a narrow-band electric small-size coupler, wherein the narrow-band electric small-size coupler comprises a section of main transmission line for transmitting radio-frequency power and a section of coupling probe consisting of a coupling line; the coupling probe is arranged in an energy distribution field of the main transmission line; both ends of the coupling line are bent to form a forward coupling output port and a back-coupling output port; and the narrow-band electric small-size coupler also comprises an absorbing load connected with the back-coupling output port. The wide-band electric small-size directional coupler is characterized by also comprising a lossy frequency response compensating network; the input end of the lossy frequency response compensating network is connected to the forward coupling output end of the narrow-band electric small-size directional coupler; and the output end of the lossy frequency response compensating network is used as the forward coupling output end of the wide-band electric small-size directional coupler. The wide-band electric small-size directional coupler has the characteristics of small volume, compact structure and convenient realization.

An SRAM-type memory cell that includes a semiconductor on insulator substrate having a thin film of semiconductor material separated from a base substrate by an insulating layer; and six transistors such as two access transistors, two conduction transistors and two charge transistors arranged so as to form with the conduction transistors two back-coupled inverters. Each of the transistors has a back control gate formed in the base substrate below the channel and able to be biased in order to modulate the threshold voltage of the transistor, with a first back gate line connecting the back control gates of the access transistors to a first potential and a second back gate line connecting the back control gates of the conduction transistors and charge transistors to a second potential. The first and second potentials can be modulated according to the type of cell control operation.

The invention discloses a power converter which comprises an inductive circuit and a two-phase staggered parallel booster circuit. The inductive circuit comprises a main inductor and a back-coupling inductor, the back-coupling inductor comprises a positive inductor and a reverse inductor which are opposite in phase, one end of the main inductor is connected with a power source while the other end of the main inductor is connected with an input end of the positive inductor and the reverse inductor, and the other end of the positive inductor and the other end of the reverse inductor are connected with anodes of two diodes of the two-phase staggered parallel booster circuit respectively. Current commutation is realized by the main inductor and the back-coupling inductor during commutation of the two-phase staggered parallel booster circuit, zero-current and zero-voltage on and off of a power switching tube are realized, influences of reverse recovery of the power switching tube are greatly reduced, and switching loss of the power switching tube is further reduced.

Disclosed is a drum for a washing machine having improved strength. The drum for a washing machine includes a center comprising a cylindrical body, a back coupled to a back portion of the center, a front coupled to a front portion of the center and having an opening, a recess formed at the back and configured to accommodate a spider connected to a driving shaft, and at least one bent portion formed at the back and projecting backwardly.

A child safety seat has a seat bottom, a seat back coupled to the seat bottom at a seat bight region, and a seating surface defined by the seat bottom and seat back to support a child occupant. A structural element is coupled to the seat bottom, the seat back, or both. A bumper has a substantially rigid component or portion and is mounted to the structural element and protrudes from a side of the child safety seat. The bumper is positioned to redirect energy from a side impact with the child safety seat away from the seat back, the seat bottom, or both and to the structural element.

In the case of a vehicle seat (1) with a first seat rail (5), a second seat rail (8) which can be moved and locked relative to the first seat rail (5), by way of which the longitudinal seat position of the vehicle seat (1) can be adjusted, an adjustable fitting connected to the second seat rail (8), a seat back coupled by way of the fitting, and a seat cushion carrier (28) coupled to the second seat rail (8) by way of a pivotable support member (30), whereby the vehicle seat (1) can be can be converted from a use position by releasing the fitting and pivoting the seat back relative to the seat cushion carrier (28) to a floor position, a device (33) is provided which queries the relative position between pivotable support member (30) and second seat rail (8) and in dependency on that releases the seat rails (5, 8).

An oscillator or a sensor comprising a unit including two frequency determining elements each of which comprises at least one interdigital converter for acoustic surface waves and a back-coupling circuit comprising an amplifier, wherein the frequency determining elements are distinguished by a temperature dependence of a synchronous frequency. The frequency determining elements are embodied in the form of acoustic surface wave resonators, and the temperature coefficients of n-th order of the synchronous frequency of the two acoustic surface wave resonators have different sings if they are not equal to zero and the temperature coefficients of (n+1st) order of the synchronous frequency of the two acoustic surface wave resonators have the same sign and the temperature coefficients from the first order to (n−1st) order of the synchronous frequency of the two acoustic surface wave resonators are equal to zero if n is greater than 1, wherein n being equal to or greater than 1, c) the ratio between the converter openings and the ratio between the lengths in the direction perpendicular to the edge teeth of the converter and to strips of the object reflectors having different frequency determining elements which are assembled in one unit are selected in such a way that the oscillator frequency variation is minimum within the range of given temperatures.

An oscillator circuit for generating a high-frequency electromagnetic oscillation, comprises: an amplifier configuration with at least one input and at least one output,-an oscillator crystal connected to at least one of the outputs of the amplifier configuration, a bandpass filter configuration, which is connected, with at least one input, to the oscillator crystal and the at least one output of the amplifier configuration connected to the oscillator crystal, and back coupled, with at least one output, to the input, or at least one of the inputs, of the amplifier configuration. Through dimensioning of the amplitude-frequency characteristic and / or the phase-frequency characteristic of the band-pass filter configuration as a function of the amplitude-frequency characteristic and the phase-frequency characteristic of the amplifier configuration and the crystal oscillator, the oscillation condition is hereby fulfilled exclusively for a selected harmonic of the oscillator crystal, and the high-frequency, electromagnetic oscillation formed by this selected harmonic of the oscillator crystal is available at the output of the bandpass filter configuration. This oscillator circuit is simply constructed and enables operation that is at least largely non-susceptible to interference.

An automobile seat includes a cushion, a back coupled with the cushion, and a mounting unit. The mounting unit includes a mounting track and an actuator slidably coupled with the mounting track and coupled with the cushion. The actuator is extendable along an axis to move the cushion toward and away from the mounting track and is rotatable about the axis to rotate the cushion relative to the mounting track.

A child safety seat has a seat bottom, a seat back coupled to the seat bottom at a seat bight region, and a seating surface defined by the seat bottom and seat back to support a child occupant. A structural element is coupled to the seat bottom, the seat back, or both. A bumper has a substantially rigid component or portion and is mounted to the structural element and protrudes from a side of the child safety seat. The bumper is positioned to redirect energy from a side impact with the child safety seat away from the seat back, the seat bottom, or both and to the structural element.

A gutter bracket assembly comprises a gutter bracket comprising a back portion, an intermediate portion extending frontwardly from the back portion, a first flange extending outwardly from the intermediate portion, and a second flange extending outwardly from the intermediate portion. The gutter bracket assembly further comprises a gutter having a back coupled with the back portion of the gutter bracket, a bottom extending frontwardly from the back, and a front extending upwardly from the bottom, wherein the front comprises a first protrusion and a second protrusion, which form a first and second cavity. The first flange of the gutter bracket engages the second cavity of the gutter and the second flange of the gutter bracket engages the first cavity of the gutter.

A convertible display fixture comprising: a top portion; a front portion coupled to the top portion; at least one side portion coupled to the front portion; a back coupled to the at least one side portion; a bottom portion coupled to the front portion; wherein the top portion, the at least one side portion, the back portion, the bottom portion and the front portion form a shipping container; and wherein the top portion, the at least one side portion, the back portion and the bottom portion collapse towards the front portion to form a display fixture. In alternate embodiments, the convertible display fixture further comprises a collapsible lock box coupled to the front portion and top portion. Other embodiments further comprise at least one skid and at least one wheel coupled to the bottom portion.

The invention discloses a preparation method of a Through-Silicon-Via (TSV) back coupling end. The method comprises thinning a semiconductor substrate from the back side of the semiconductor substrate to make a TSV prepared in the semiconductor substrate in advance expose from the back of the semiconductor substrate, carrying out a chemically mechanical polishing towards the back of the semiconductor substrate to make the back surface of the TSV lower than that of the semiconductor substrate, forming an auxiliary metal layer on the back surface of the TSV, wherein the auxiliary metal layer and the main metal filling the TSV form a metal lamination composition on the back surface of the TSV, etching the back of the semiconductor substrate to make the metal lamination composition protrude from the back surface of the semiconductor substrate so as to form the TSV back coupling end. According to the invention, a recess effect of the chemically mechanical polishing technology is utilized to superpose the auxiliary metal layer on the back surface of the TSV in the modes of free mask and low temperature and the feasibility and yield of using the TSV to realize stacking and integration of multilayer microelectronic chips are improved.

An oscillator or a sensor comprising a unit including two frequency determining elements each of which comprises at least one interdigital converter for acoustic surface waves and a back-coupling circuit comprising an amplifier, wherein the frequency determining elements are distinguished by a temperature dependence of a synchronous frequency. The frequency determining elements are embodied in the form of acoustic surface wave resonators, and the temperature coefficients of n-th order of the synchronous frequency of the two acoustic surface wave resonators have different sings if they are not equal to zero and the temperature coefficients of (n+1st) order of the synchronous frequency of the two acoustic surface wave resonators have the same sign and the temperature coefficients from the first order to (n-1st) order of the synchronous frequency of the two acoustic surface wave resonators are equal to zero if n is greater than 1, wherein n being equal to or greater than 1, c) the ratio between the converter openings and the ratio between the lengths in the direction perpendicular to the edge teeth of the converter and to strips of the object reflectors having different frequency determining elements which are assembled in one unit are selected in such a way that the oscillator frequency variation is minimum within the range of given temperatures.

A carry system or a medical ceiling support for carrying or supporting medical-technical devices in a hospital treatment room. The ceiling support is provided with at least one extension or arm arranged substantially horizontally and at least one supporting column; at least one pivot joint and / or at least one lifting and lowering device; a support head mounted at the extension or arm for reception of the medical-technical devices; and an operating aid with at least one operating element for releasing or operating a respective brake in the at least one pivot joint or for operating the at least one lifting and lowering device. The ceiling support is arranged for generation of a feedback or back coupling which identifies or characterizes the respective brake or lifting and lowering device operated by the operating aid for a user locally at the support.

Apparatuses and methods are provided for driving an input conductor with a signal comprising a series of voltage pulses. The pulses can beneficially invoke the skin effect to generate a time-varying magnetic vector potential that projects radially from a surface of the input conductor. The time-varying magnetic vector potential can provide an electric field for inducing output voltage pulses in an output circuit. The input conductor and output circuit can have various configurations. For example, the input conductor can extend along a plane, and the output circuit can at least partially reside in the plane and extend away from the input conductor in the plane. Such a geometry can reduce any back coupling between the two circuits, e.g., between electromagnetic fields caused by any current in the two circuits. Such a geometry would not normally allow for induction between the two circuits, which can reduce any Lenz effects.

A task chair with a chair base, a pivoting mechanism housing supported by the chair base, a non-pivoting seat bottom, and a pivoting seat back coupled to the pivoting mechanism housing. The seat bottom can have a rigid seat pan that underlies a flexible seat insert and a seat cushion. The seat pan, the seat insert, and the seat cushion can be matingly engaged. A seat back frame can retain a panel of elastomeric material, and lumbar supports can be slidably retained by the seat back frame. The lumbar supports can be flexible to adjust to contoured support rails and can be fixed at selected locations along the rails. The lumbar supports can have non-symmetrical, contoured surfaces and shapes and can be nondestructively removable and exchangeable. Adjustable arm structures with upper and lower arm members can be raised and lowered by operation of an actuation trigger.

The embodiment of the invention provides a train coupling control method and control system. The system comprises the steps of indicating a passive coupling vehicle to drive to a corresponding to-be-coupled area and enter a to-be-coupled state by an ATS; indicating an active coupling vehicle to drive to a position which is a preset distance away from the passive coupling vehicle and enter a to-be-coupled state by the ATS; driving the active coupling vehicle towards the passive coupling vehicle according to a safe driving distance which is sent by a ZC and allows collision until the coupler coupling with the passive coupling vehicle is completed after a decoupling instruction sent by the ATS is received by the coupling vehicle; performing identification and position combined operation on the passive coupling vehicle and the active coupling vehicle after the condition that the coupler coupling of the passive coupling vehicle with the active coupling vehicle is completed is obtained by the ZC, and sending combination completion information to the passive coupling vehicle and the active coupling vehicle; and reporting the vehicle position of the back coupled vehicle to the ZC by one ofthe passive coupling vehicle and the active coupling vehicle. According to the train coupling control method and control system, automatic coupling can be realized.