67results about How to "Improve signal transmission stability" patented technology

An electrical connector includes an electrically insulative housing that has a rear accommodation space, a front receiving unit for receiving a matching electrical connector, terminal slots formed in the front receiving unit and extended to the rear accommodation space and recessed locating portions symmetrically disposed at two opposite lateral sides, a circuit board mounted in the rear accommodation space of the housing and having signal terminals extended from the front side thereof and respectively inserted into the terminal slots of the housing and suspending in the front receiving unit of the housing, an adapter module fastened to the rear bottom side of the circuit board and carrying a plurality of input terminals that have the respective front connection portions respectively electrically connected to the metal contacts of the circuit board and the respective rear bonding portions downwardly extending out of the bottom wall of the adapter module for bonding to an external circuit board, grounding spring plates respectively mounted in the recessed locating portions of the housing and bonded to the circuit board for grounding, and a metal shield surrounding the housing and the adapter board and kept in positive contact with the grounding spring plates for grounding.

A crosstalk-proof plug connector has an insulating housing, a mounting bracket, multiple first terminals, multiple second terminals and a shell. The first terminals are mounted on the insulating housing. The second terminals are mounted on the mounting bracket. Each terminal has a mounting section, a soldering section and a contacting section. The soldering sections are arranged in a transverse row with a specific sequence to prevent crosstalk interfering with signal transmission.

Embodiments of the present invention provide a signal transmission method and apparatus used in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, to enhance stability of signal transmission and resist time-frequency dispersion. The signal transmission method used in the OFDMA wireless communication system provided by an embodiment of the invention includes: converting an L×1 symbol vector into an N×1 modulating signal vector according to a loading factor fed back by a receiving party, in which value of N is known, both L and N are natural numbers larger than one, N is larger than or equal to L, the loading factor is a ratio of L and N; mapping the N×1 modulating signal vector into N time-frequency grids; and converting the N time-frequency grids into a signal waveform and sending the signal waveform to the receiving party.

A high frequency connector includes a first module and a second module for signal transmission. The two modules are easily manufactured and assembled. The disclosed high frequency connector can maneuverably connect with the connector thereof according to the required direction of signal transmission so that competent transmissive connection is achieved when the two modules are assembled and thus preventing generation of noise. The volume of each of the two modules is precisely designed so that the high frequency connector facilitates reduction in power loss when being implemented for the purpose of signal transmission.

The invention relates to a through hole filling and plating method applied to an optical module high-density interconnection HDI board. The through hole filling and plating method sequentially comprises the steps of copper reduction, positive and negative drilling, trepanning and drilling, adhesive removal and copper deposition, first exposure and development, through hole electroplating, film stripping, plate grinding, second exposure and development and hole filling and electroplating. According to the through hole filling and plating method applied to the optical module high-density interconnection HDI board, drilling is carried out twice, so that the cross section of a through hole is in the shape of a step which is small at the middle portion and is large at two ends; the step-by-stepfilling and plating of the through hole are achieved through two hole filling steps on the middle portion and the two ends of the through hole; and therefore, the core wrapping phenomenon of the through hole in a filling and plating process is prevented, and the signal transmission stability of the circuit board is effectively improved.

The invention discloses a composite cable for a computer. The composite cable comprises a square rubber framework of which the cross section is square, wherein a one-quarter arc rubber baffle board isconnected between middle portions of every two adjacent inner side boards in the square rubber framework, the central portion of the square rubber framework is provided with a data cable core, an outer wall of the data cable core contacts with an outer wall of the one-quarter arc rubber baffle board, an inner chamber formed by each one-quarter arc rubber baffle board and the square rubber framework is internally provided with a control cable core, an outer side of the square rubber framework is sequentially wrapped in a porcelain fireproof compound belt strapping layer, a ratproof metal wirearmored layer, a carbon black paper insulation shielding layer, a nanometer EP rubber inner sheath layer and an oversheath layer. The composite cable is advantaged in that the square rubber frameworkand the one-quarter arc rubber baffle boards are matched for use, the structure is novel and compact, design is reasonable, signal transmission stability is good, the volume is small, weight is light,the anti-pressing pull-resistant effect is good, and the composite cable is safe and convenient to use.

The invention discloses a hub motor with a torque sensing function. The hub motor comprises a hub, a motor core contained in the hub and a driving shaft sleeve fixed coaxially with the hub to be used for mounting a flywheel. The driving shaft sleeve comprises an outer sleeve body, an inner sleeve body and a plurality of connecting bars, wherein the outer sleeve body and the inner sleeve body are arranged coaxially, and the multiple connecting bars are connected between the outer sleeve body and the inner sleeve body and distributed at intervals in the circumferential direction. The outer sleeve body and the hub are fastened. A flywheel connecting structure used for being connected with the flywheel in a fastened mode is arranged on the inner sleeve body. Torque induction magnetic steel is fixedly arranged on the inner sleeve body. A signal output plate is fixedly arranged on the outer sleeve body. A Hall element corresponding to the torque induction magnetic steel is arranged on the signal output plate.

The invention discloses a torque and speed sensor for an electric bicycle which comprises a chain wheel, a crank and a deformation frame. The deformation frame is formed by an outer ring, an inner ring and a plurality of connecting ribs, wherein the outer ring and the inner ring are coaxially arranged, the connecting ribs are distributed in a radial mode, and the connecting ribs are connected between the inner ring and the outer ring. The inner ring is fixed to the crank, the outer ring is fixed to the chain wheel, and torque sensing magnetic steel and a linear hall integrated circuit corresponding to the torque sensing magnetic steel are respectively arranged on the inner ring and the outer ring. The torque and speed sensor further comprises a movable seat and a fixed seat, wherein the movable seat and the fixed seat are coaxially distributed together with the deformation frame, the movable seat is connected to the deformation frame, an auxiliary edge winding is fixed to the movable seat, the fixed seat is connected to the movable seat and can rotate around the axis of the movable seat, an original edge winding and a signal receiving plate are fixed to the fixed seat, the original edge winding and the auxiliary edge winding jointly form an isolation transformer, the original edge winding is electrically connected with an alternating-current generator arranged on the signal receiving plate, an outgoing line is arranged on the signal receiving plate, and the auxiliary edge winding is electrically connected with a signal outputting plate. The torque and speed sensor for the electric bicycle is simple in structure, stable in performance and high in sensitivity.

An opto-electronic micro-module includes a monocrystalline substrate having a first surface and a second surface parallel to said first surface, wherein a through hole passes from said first surface through said monocrystalline substrate to said second surface; and an optical substrate having a first portion in said through hole and a second portion protruding from said through hole.

A backup transmission structure of an electronic device includes a switching unit, and primary and backup transmission circuits connected to host and terminal equipment respectively. The primary and backup transmission circuits include first and second switches respectively. The switching unit normally outputs an ON signal to the first switch to connect the primary transmission circuit for an electric connection of the host and terminal equipment. The primary transmission circuit obtains a circuit disable signal to switch outputting the ON signal to the second switch for electrically connecting the backup transmission circuit, so as to maintain an electric connection between the host equipment and the terminal equipment, and improve the stability of signal transmissions between the host equipment and the terminal equipment to overcome the shortcomings of the prior art adopting a host equipment that uses a single transmission circuit to connect terminal equipment in series and resulting in frequent breakdowns.

The invention is applicable to the technical filed of a cable, and provides a network cable used for a drag chain system. The cable comprises multiple pairs of mutually-stranded core wires, inner division sheaths, a shielding layer, an inner lining sheath and an outer lining sheath; each pair of the core wires comprises two core wires which are stranded mutually; each core wire comprises a conductor and an insulating layer; the conductor is formed by multiple strands of oxygen-free copper wires in a stranding manner; the periphery of the conductor is coated with the corresponding insulating layer; the periphery of each core wire pair is coated with the corresponding inner division sheath; the peripheries of the multiple inner division sheaths are coated with the inner lining sheath; the periphery of the inner lining sheath is coated with the shielding layer; the periphery of the shielding layer is coated with the outer lining sheath; and the insulating layer comprises the following components based on mass percentages: 34-40% of styrene-butadiene block copolymer hydride, 14-26% of white mineral oil, 0.1-0.2% of antioxidant, 15-30% of polypropylene and 5-20% of calcium carbonate. The service life and signal transmission stability of the cable can be greatly prolonged and reinforced.