摘要:
A micro magnetic switch includes a reference plane and a magnet located proximate to a supporting structure. The magnet produces a first magnetic field with uniformly spaced field lines approximately orthogonal to the reference plane, symmetrically spaced about a central axis, or non-uniformly spaced fields approximately orthogonal to the reference plane. The switch also includes a cantilever supported by the support structure. The cantilever has an axis of rotation lying in the reference plane and has magnetic material that makes the cantilever sensitive to the first magnetic field, such that the cantilever is configured to rotate about the axis of rotation between first and second states. The switch further includes a conductor located proximate to the supporting structure and the cantilever. The conductor is configured to conduct a current. The current produces a second magnetic field having a component approximately parallel to the reference plane and approximately perpendicular to the rotational axis of the cantilever, which causes the cantilever to switch between the first and second states. The switch still further includes a stopping device located proximate to the supporting structure. The stopping device is operable to stop the cantilever from rotating about the axis of symmetry beyond a point at which a longitudinal axis of the cantilever is approximately parallel to a longitudinal axis of the magnet.
摘要:
A method, system, and apparatus for testing one or more micro-magnetic switches on a wafer is described. A magnet is positioned adjacent to a first switch on the wafer. A probe card is positioned adjacent to the first switch. The probe card mounts a first set of probes and a second set of probes. The first set of probes interface with contact areas of a coil associated with the first switch. The second set of probes interface with conductors on the wafer associated with the cantilever of the first switch. A current source is electrically coupled to the first set of probes. The current source activates the coil of the first switch using the first set of probes to switch the cantilever from a first state to a second state. A switch state monitor is electrically coupled to the second set of probes. The switch state monitor determines whether the cantilever of the first switch is in the first state prior to the current source activating the coil of the first switch. The switch state monitor also determines whether the cantilever is in the second state after the current source activates the coil of the first switch. A stepper motor moves the wafer relative to the magnet and probe card to test further switches on the wafer. An inker marks a switch on the wafer that has been determined by the switch state monitor to be defective.
摘要:
According to various embodiments of the invention, a relay is suitably formed to exhibit an open state and a closed state. The relay is operated by providing a cantilever sensitive to magnetic fields such that the cantilever exhibits a first state corresponding to the open state of the relay and a second state corresponding to the closed state of the relay. A first magnetic field may be provided to induce a magnetic torque in the cantilever, and the cantilever may be switched between the first state and the second state with a second magnetic field that may be generated by, for example, a conductor formed on a substrate with the relay.
摘要:
A complementary heterojunction semiconductor device (10) has a first resonant interband tunneling transistor (12) coupled to a second resonant interband tunneling transistor (14) through a common output (16). The first transistor (12) has a first gate (18) of a first semiconductor type and a drain (28) coupled to the first gate (18). The first gate (18) is also coupled to the common output (16). The second transistor (14) has a second gate (32) of a second semiconductor type and a source (42) coupled to the second gate (32). The second gate (32) is also coupled to the common output (16). The valence band (60,80,82) of the first semiconductor type has an energy level greater than the conduction band (62,64,84) of the second semiconductor type.
摘要:
A heterojunction device including a first semiconductive layer on a substrate, a barrier layer on the first layer, a second semiconductive layer on the barrier layer and a multi-layer cap, on the second semiconductive layer. First and second gates positioned on layers of the cap to define first and second transistors, with the cap layers being selected and etched to pin the Fermi level in a first transistor conduction channel in the second semiconductive layer such that the number of carriers in the first conduction channel are substantially less than the number of carriers in surrounding portions of the second semiconductive layer and the Fermi level in a second transistor conduction channel in the first semiconductive layer such that the number of carriers in the second conduction channel are substantially less than the number of carriers in surrounding portions of the first semiconductive layer.
摘要:
A resonant tunneling diode having a quantum well sandwiched between first and second tunnel barrier layers and the quantum well and tunnel barrier layers sandwiched between an injection layer and a collector layer. The improvement includes a relatively thin layer of semiconductor material sandwiched between either the first tunnel barrier layer and the injection layer or the first tunnel barrier layer and the quantum well. The thin semiconductor layer has a valence band with an energy level lower than the valence band of the first tunnel barrier layer so as to prevent minority carriers from travelling toward the injection layer.
摘要:
A coaxial RF switch comprising a pair of coaxial conductors and a confinement flexure affixing to a conductor reed, wherein said confinement flexure having at least one fixed end such that the conductor reed can move freely and consistently to make and break the connections to the coaxial conductors.
摘要:
Disclosed is a mobile terminal. The mobile terminal comprises an antenna body and a metal ring. The metal ring is provided on the mobile terminal without contacting the antenna body, and the vertical projection of the metal ring on a plane where the antenna body is located intersects the antenna body. By means of the disclosure, signal receiving performance of the mobile terminal is improved, and the loss caused by head and hand is reduced to a certain extent.
摘要:
A system that incorporates teachings of the subject disclosure may include, for example, dividing a media content item into a plurality of media content segments, at each media content segment of the plurality of media content segments, applying motion estimation between at least two video frames of the media content segment to determine a content weight for the media content segment, determining a bit rate for the media content segment according to the determined content weight for the media content segment, and encoding the media content segment at the determined bit rates to generate a data stream for the media content segment, whereby a plurality of data streams for the plurality of media content segments of the media content are generated, and transmitting the plurality of data streams for the plurality of media content segments of the media content to the one or more media devices. Other embodiments are disclosed.
摘要:
A system that incorporates teachings of the subject disclosure may include, for example, receiving video content at a mobile device, utilizing the mobile device for adjusting dimensions of an area of attention in an image of the video content based on a desired display resolution, utilizing the mobile device for adjusting dimensions of a peripheral portion that surrounds the area of attention, and replacing the image with the adjusted image during presentation of the video content. Other embodiments are disclosed.