115results about How to "Impedance stability" patented technology

Herein disclosed a semiconductor device in which a semiconductor chip is mounted over a substrate, the device including a plurality of through-interconnects configured to be formed inside each of through-holes that penetrate the substrate and be led from the semiconductor chip to a face of the substrate on an opposite side of the semiconductor chip.

Systems, methods and computer-accessible mediums can be provided that can establish particular parameters for electric pulses based on a characteristic(s) of the tissue(s), and control an application of the electric pulses to tissue(s) for a plurality of automatically controlled and separated time periods to ablate the tissue(s) through mediation of membrane potential and through inducing the cells through a plurality of charge—discharge cycles such that an electroporation of a majority of the tissue(s) is prevented or reduced.

A wired circuit board includes a wiring formation portion, a terminal formation portion, and a middle portion formed therebetween. The wiring formation portion includes a first conductive layer formed on a first insulating layer, and a second conductive layer formed on a second insulating layer so as to overlap the first conductive layer in a thickness direction. The terminal formation portion includes the first and second conductive layers formed in parallel in the same plane. The middle portion includes the first conductive layer formed on the first insulating layer, and the second conductive layer formed on a portion of the second insulating layer extending from the wiring formation portion to a mid-point between the wiring formation portion and the terminal formation portion, and formed on a portion of the first insulating layer extending from the mid-point to the terminal formation portion.

The present disclosure relates to a quadrature RF power amplifier (PA) architecture that uses a single-ended interface to couple a non-quadrature PA path to a quadrature PA path, which may be coupled to an antenna via an antenna port. The quadrature nature of the quadrature PA path provides tolerance for changes in antenna loading conditions. An RF splitter in the quadrature PA path presents a relatively stable input impedance, which is predominantly resistive, to the non-quadrature PA path over a wide frequency range, thereby substantially isolating the non-quadrature PA path from changes in the antenna loading conditions. Further, the input impedance substantially establishes a load line slope of a feeder PA stage in the non-quadrature PA path, thereby simplifying the quadrature RF PA architecture. One embodiment of the quadrature RF PA architecture uses two separate PA paths, either of which may incorporate a combined non-quadrature and quadrature PA architecture.

An electric connector for shielded cable, which improves the reliability of connection between a ground terminal and an external conductor and secures stable impedance characteristics. In this electric connector, a first housing is primarily molded on the external conductor, the external conductor is provided with a support protrusion that protrudes inside of the external conductor and contacts the ground terminal, and the second housing being secondarily molded is provided with a through hole, which is formed by a core pin that protrudes inwards from a mold and presses the ground terminal at a position where the second housing faces the support protrusion with the ground terminal in between.

A laser device is disclosed which stabilizes impedance at laser drive initiation, and in which an oscillation at low current, a high reaction speed, a low noise, and the like are achieved. A semiconductor laser device includes first and second conductive type semiconductor layers, an active layer, and first and second electrodes. The second electrode comprises an ohmic electrode and a pad electrode. The first electrode is formed on the same planar side of the first conductive type semiconductor layer as the second electrode, and is disposed in the same direction as the pad electrode with respect to the ohmically connected region. The second conductive type semiconductor layer is set to a width that can secure light confinement on both sides of the ohmically connected region.

The invention relates to a bioelectric electrode which is extensively applied to bioelectric recording, measurement and stimulation, including high-density electrode measurement, medical facilities, mobile equipments, family health care, psychological cognition, games, a brain-computer interface, rehabilitation training and the like, and is particularly applicable to electroencephalogram measurement. An electrode tip is a columnar pipe, and the middle part of the electrode tip is provided with an electrolyte circulating hole; one end of the electrode tip is a working end in contact with a living body, and the other end of the electrode tip is an electrolyte entering end; the electrode tip is located on one end plane of an electrode body; the middle part of the electrode body is provided with a cavity used for accommodating an electrolyte and communicating with a middle through hole; the electrode tip is a conductor, and the electrode body is either a conductor or an insulator; the electrode tip is communicated with an external circuit directly through the electrode body. The bioelectric electrode provided by the invention has the main advantages of being simple in structure, low and stable in electrode impedance, low in measurement noise, small in artifact, convenient and comfortable to use, and an electrolyte ion conductor and an electrode tip electronic conductor are simultaneously in contact with the skin, thereby being applicable to the relevant applications of bioelectricity recording, measuring and stimulation.

An antenna comprising a laminate of dielectric ceramic layers each provided with electrode patterns, the laminate comprising a first terminal electrode connected to a feed line and a second terminal electrode for grounding on the lower surface, a radiation electrode on the upper surface or on a layer near the upper surface, and a coupling electrode between the lower surface and the radiation electrode; the coupling electrode being connected to the first terminal electrode through via-holes; the radiation electrode being connected to the second terminal electrode through via-holes; and the coupling electrode being partially opposite to the radiation electrode in a lamination direction to form a capacitance-coupling portion.

The invention provides an anti-interference electrocardiograph detection system, a detection method, a special flexible graphene electrode, and a preparation method and the application of the special flexible graphene electrode. The anti-interference electrocardiograph detection system comprises the flexible graphene electrode, an electrocardiosignal acquiring and processing module, an impedance measurement module, an electrocardiographic wire and a signal processing module, can measure an electrocardiosignal and a motion artifact signal, and removes the motion artifact in the electrocardiosignal. The flexible graphene electrode is formed in a way that a graphene material is adhered on a sponge layer through negative pressure deposition to obtain a graphene-sponge conductive composite, a fastener is additionally added on the graphene-sponge conductive composite, and the electrocardiographic wire is fixedly connected to the graphene-sponge conductive composite through the fastener. The anti-interference electrocardiograph detection system and the detection method effectively overcome the interference of the motion artifact on the electrocardiosignal, and guarantees the instantaneity, the accuracy and the reliability of the electrocardiographic examination result; the preparation flow of the flexible graphene electrode is simple, the biological compatibility of the flexible graphene electrode is good, the service life of the flexible graphene electrode is long, and the flexible graphene electrode can be used in the anti-interference electrocardiograph detection system.

In a multilayer printed wiring board having a plurality of laminated resin layers, a plurality of wiring patterns formed on the interfacial surface of the resin layers, and a plurality of lands formed on the outermost layer of the resin layers and on which the solder is provided, at least one of the wiring patterns has a plurality of openings in the form of a mesh, the size of openings of the wiring patterns in a region corresponding to the position of solder in which a stress generated in the solder provided on the lands becomes a value larger than a desired value due to thermal deformation of the semiconductor device and the multilayer printed wiring board is larger than that of openings in the other regions.

Provided is a switched multiplexer configured to combine first, second, third and fourth signal paths each covering a sub-octave in a frequency range of from about 2 to about 18 GHz and to remove transmitter harmonics of an input signal to create a stable output impedance across the frequency range. The switched multiplexer comprises a transmit switch, a first diplexer and a power combiner. The first diplexer is connected in parallel with a second diplexer. The first diplexer comprises first and second signal paths. The second diplexer comprises third and fourth signal paths. Each one of the first, second and third signal paths include respective ones of the first switch, a second switch and a third switch, each interconnected to respective ones of a first signal path high-pass filter, second signal path low-pass filter and third signal path low-pass filter by respective ones of a first, second and third filter. Each one of the first, second and third filters have a respective filter capability in the range of from about 6-10.4 GHz, 2-3.5 GHz, and 3.5-6 GHz.

The invention relates to a bio-electrical signal sensor and a method using the sensor for manufacturing an electric signal collecting device. The sensor comprises an electrode tip provided with columnar tubes and a connecting body, an electrode body provided with a cavity, and electrolytes. A sealing part is arranged at the upper end of the cavity. An electrode is communicated with the electrolytes. The electrode tip is made of a flexible material. Electrolyte permeation cores with tiny holes are arranged in the middles of the columnar tubes. The manufacturing method for the collecting device comprises the steps that the electrical signal sensor is installed, and one ends of supporting bands penetrate into connecting holes in fixing blocks; or furthermore, multiple signal electrical signal collecting devices are combined to form a combined type electrical signal connecting device matched with an organism. The bio-electrical signal sensor has the advantages that the sensor is reasonable in structure and easy to manufacture, and the electrode tip can be replaced; as the porous permeation cores mutually independent are arranged in the middles of the flexible columnar tubes of the electrode tip, the electrode makes good contact with skin, electrode impedance is stable, the measurement precision is high, and wearing comfort is improved.

The invention discloses a device and a method for impedance matching and bias compensation for difference transmission lines, wherein the device comprises a first transmission line connected with a first signal transmitting end and a first signal receiving end, a second transmission line connected with a second signal transmitting end and a second signal receiving end, a bias compensation circuit bridged over the two transmission lines, and an impedance matching circuit bridged over the two transmission lines and close to the signal sending end. The bias compensation circuit comprises a first resistor connected between an input voltage and the first transmission line, a second resistor connected between the first transmission line and the second transmission line, and a third resistor connected between the second transmission line and a ground wire; and the impedance matching circuit comprises a matching resistor and a matching capacitor which are connected together in series, wherein the matching resistor is connected with the first transmission line, and the matching capacitor is connected with the second transmission line. With the device and the method, the quality and the accuracy of signal transmission as well as the stability of data transmission of the difference transmission lines can be ensured with lower system power consumption.

The invention provides a compound polymer electrolyte material, a preparation method thereof, an electrolyte membrane and an all-solid-state lithium secondary battery. The electrolyte material is prepared from a polymer matrix, alkali metal salt and sulfide inorganic electrolyte. The sulfide inorganic electrolyte is prepared from lithium-ion conductors with the general formulas in formula I(Li4-x1Ge1-x1Px1S4), the formula II (Li10+x2G1+x2P2-x2S12) and the formula III (Li3+5x3P1-x3S4) or Li2S-M type lithium-ion conductors. In the formula I, x1 is larger than 0 and smaller than 1; in the formula II, x2 is equal to 0 or 1, and G is selected from Si, Ge or Sn; in the formula III, x3 is larger than 3 and smaller than 0.27. M is selected from the compound of P2S5 and D. D is selected from one or more of LiI, Li3PO4, Li4SiO4, P2O5 and P2S3. The compound polymer electrolyte material has high lithium stability, an electromechanical window and high electric conductivity.

An insulator is provided between interconnect layers oppositely placed. The interconnect layers are connected between by connection members provided through the insulator. The connection members at one and the other ends are connected between in their center positions. A shield layer is provided spaced from the intermediate connection layer generally on a same plane as the intermediate connection layer. A condition of (R·r) / (2·h)≦L≦(5·R·r) / h is satisfied, provided that a connection distance between the interconnect layers through the connection members and the intermediate connection layer is h, the connection members where considered generally as a circular cylinder have a diameter R, the intermediate connection layer where considered generally as circular has a diameter r, and a spaced distance between the intermediate connection layer and the shield layer is L. Thus, characteristic impedance is stabilized.

The invention relates to an EEG (Electroencephalograph) electrode cap. The EEG electrode cap comprises a cap body, electrodes and leading wires, wherein each electrode comprises a fixing ring, an electrode slice and a bonding sealant; a cavity of which two ends are opened and are communicated is formed in the middle part of each fixing ring, each cavity is internally provided with an electrode slice locating platform, and the electrode slices are arranged on the electrode slice locating platforms; one side of each electrode slice is fixed with the inner wall of the cavity of the corresponding fixing ring through the bonding sealant, and the other side of each electrode slice is combined with a conductive adhesive in a conductive adhesive chamber; fixing grooves are formed in the outer cylindrical surfaces of the fixing rings, and the fixing grooves are used for fixing the electrodes with the cap body; conductive adhesive filling holes which are communicated with the conductive adhesive chamber are formed in the bonding sealant after the bonding sealant is solidified; the electrode slices are connected with the leading wires penetrating through leading wire holes in the fixing rings. The EEG electrode cap disclosed by the invention has the advantages that the electrode slices and the fixing rings are integrally designed, and skin pretreatment, adhesive filling and adhesive supplementation can be conveniently carried out; the locating is convenient and reliable, the EEG electrode cap is tightly attached to the scalp, the wearing is comfortable, and the EEG electrode cap is particularly suitable for EEG measurement under the environment of high density, long sleep process, MEG (Magnetoencephalography) and nuclear magnetism.

A laser device is disclosed which stabilizes impedance at laser drive initiation, and in which an oscillation at low current, a high reaction speed, a low noise, and the like are achieved. A semiconductor laser device includes first and second conductive type semiconductor layers, an active layer, and first and second electrodes. The second electrode comprises an ohmic electrode and a pad electrode. The first electrode is formed on the same planar side of the first conductive type semiconductor layer as the second electrode, and is disposed in the same direction as the pad electrode with respect to the ohmically connected region. The second conductive type semiconductor layer is set to a width that can secure light confinement on both sides of the ohmically connected region.

A keystone jack (10) includes a cover body (1), a lining body (2), a carrier body (3), a printed circuit board (4), a housing (5), and a flap (6). The cover body (1) includes a space (11). The space (11) includes a cruciform partition with an elongated partition plate (13) perpendicular interlaced a short partition plate (14). The lining body (2) has two edges (21). A connection part (22) is between the two edges (21). A stud (23) and a separation plate (24) are between the connection part (22) and the two edges (21). The stud (23) has a first channel (231). The separation plate (24) has a second channel. When the lining body (2) is installed in the space (11), the elongated partition plate (13) and the short partition plate (14) in the space (11) are through the first channel (231), the second channel (242), and the opening (25) to form a double-cross isolation structure. When the keystone jack (10) is used, the electricity is more stable, and the crosstalk interferences are decreasing, and the impedance is more stable, and the electronic signals are not decayed.

Provided is a switched multiplexer configured to combine first, second, third and fourth signal paths each covering a sub-octave in a frequency range of from about 2 to about 18 GHz and to remove transmitter harmonics of an input signal to create a stable output impedance across the frequency range. The switched multiplexer comprises a transmit switch, a first diplexer and a power combiner. The first diplexer is connected in parallel with a second diplexer. The first diplexer comprises first and second signal paths. The second diplexer comprises third and fourth signal paths. Each one of the first, second and third signal paths include respective ones of the first switch, a second switch and a third switch, each interconnected to respective ones of a first signal path high-pass filter, second signal path low-pass filter and third signal path low-pass filter by respective ones of a first, second and third filter. Each one of the first, second and third filters have a respective filter capability in the range of from about 6-10.4 GHz, 2-3.5 GHz, and 3.5-6 GHz.

An inductor obtained by laminating a plurality of ceramic layers having an internal coil conductor, and a thermistor obtained by laminating a plurality of ceramic layers having internal electrodes and having a predetermined resistance-temperature characteristic are laminated via an intermediate insulating layer. Both ends of the internal coil conductor of the inductor and the internal electrodes of the thermistor are connected to a pair of external electrodes. Thus, the inductor and the thermistor are connected in parallel.

In one embodiment, provided is a semiconductor device including a first semiconductor package, a second semiconductor package and a conductive plate. The first semiconductor package includes a first interconnect substrate and a first semiconductor chip. The second semiconductor package includes a second interconnect substrate and a second semiconductor chip, and is stacked on the first semiconductor package. The conductive plate is provided between the first semiconductor package and the second semiconductor package. The conductive plate is electrically coupled to the GND plane of the mounting board, so that a fixed potential is provided. The distance from the lower surface of the first interconnect substrate to the lower surface of the second interconnect substrate is larger than a total of a thickness of the first interconnect substrate, a thickness of the first semiconductor chip and a thickness of the conductive plate.

The invention discloses a vertically polarized omnidirectional antenna that is fed by a coaxial line including an inner conductor and an outer conductor. The vertically polarized omnidirectional antenna includes a main vibrator, an insulating medium, and a reference ground which are sequentially stacked and sequentially connected in a top-down manner. The main vibrator includes two vibrator pieces arranged in a crisscross, a straight line where an intersecting line between the vibrator pieces is located perpendicularly passes through the center of the reference ground, a base angle of each vibrator piece is set to be a corner cut, the inner conductor passes through the center of the reference ground and the insulating medium and is connected with the bottom of the main vibrator, and the outer conductor is connected with the reference ground. The vertically polarized omnidirectional antenna stably receives vertically polarized television signals from various directions through cooperatively interaction between the main vibrator, the insulating medium and the reference ground. The insulating medium is a key element of adjusting antenna impedance and being effective in impedance matching, so that an effect of receiving vertically polarized television signals from various directions by the antenna is greatly improved, the impedance is stable, and signal receiving stability and signal quality are greatly improved.

The invention discloses a half-dry electrode for bioelectrical signal sensing. The half-dry electrode comprises a supporting base, at least one supporting leg attached to the supporting base and extending from the supporting base, an ion slow release body and sensing elements arranged at the tail end of the supporting leg. The ion slow release body contains conductive liquid and slowly releases the conductive liquid to present the half-dry surface to a subject; at least part of the ion slow release body or the conductive liquid released by the ion slow release body is in contact with the sensing elements, and thus bioelectrical signals are transmitted to the sensing elements from the subject through the ion slow release body. The half-dry electrode is reasonable in structure, convenient and comfortable to use and good in contact with the skin, electrode-skin impedance is relatively low and stable, and signal quality is good.

An antenna device includes an antenna element including a dielectric substrate including a first principal surface and a second principal surface, a built-in feed line provided on the first principal surface of the dielectric substrate, and a radiating element provided on the second principal surface of the dielectric substrate and along the built-in feed line so that the radiating element is fed from the built-in feed line, a triplate line including a first outer conductor and a second outer conductor parallel to each other, and a central conductor arranged therebetween to feed excitation power to the antenna element, a connecting member which electrically connects the central conductor and the built-in feed line, a projecting piece from one end of the dielectric substrate toward the second outer conductor, and a first hole and a second hole provided in the first outer conductor and in communication with each other. The first hole includes a first opposite surface to the connecting member with a specified space therebetween. The projecting piece is inserted in the second hole. The second hole includes an opposite regulating surface to the first principal surface of the projecting piece of the dielectric substrate, to regulate movement of the dielectric substrate toward the first opposite surface.