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 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.

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 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 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.

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.

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.

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.

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.

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.