41results about How to "Reduce signal leakage" patented technology

An electronic device includes a plurality of stacked substrates. Each of the substrates includes a semiconductor substrate, a columnar conductor, and a ring-shaped insulator. The columnar conductor extends along a thickness direction of the semiconductor substrate. The ring-shaped insulator includes an inorganic insulating layer mainly composed of a glass. The inorganic insulating layer fills a ring-shaped groove that is provided in the semiconductor substrate to surround the columnar conductor.

An apparatus for providing ESD protection to an integrated circuit device comprising a substrate of one type of semiconductor, a first region of a complementary type of semiconductor formed in the substrate, which surrounds a second region of said one type of semiconductor. A plurality of diodes each is formed in one of the plurality of second regions. The at least one first region is disposed between the plurality of second regions and the substrate to prevent direct contact between the second regions and the substrate. The plurality of diodes are connectable in series for coupling to the integrated circuit device for providing ESD protection.

A wireless communication system has a first operation mode (GSM mode) for amplifying a phase-modulated high frequency signal with a high frequency power amplifier circuit and a second operation mode (EDGE mode) for amplifying a phase and amplitude-modulated high frequency signal with the amplifier circuit. The amplifier circuit has an input of a high frequency signal, with the amplitude and frequency being fixed in both the first and second operation modes, and operates by being controlled for the bias state of each amplifying stage in accordance with the output control signal produced by a control circuit based on the demanded output level (Vapc) and the detected output level (VSNS) so that the amplifier circuit performs signal amplification to meet the demanded output level.

A transceiver for reducing transmit signal leakage is described. The transceiver includes a downconverter that downconverts a receive signal to produce a feedback signal. The transceiver also includes a weight learning module that correlates the feedback signal with a transmit signal to obtain a weight. The transceiver further includes a transmit leakage estimator that obtains an estimated transmit leakage signal based on the weight and the transmit signal. The transceiver also includes a transmit leakage reducer that reduces the transmit leakage in the receive signal based on the estimated transmit leakage signal.

Mapping of myelin water content in white matter may provide important information for early diagnosis of multiple sclerosis and the detection of white matter abnormality in other diseases. It is disclosed here that free induction decay (FID) of each voxel at multiple slice locations is acquired in the brain using an echo-planar spectroscopic imaging (EPSI) pulse sequence. The multi-slice EPSI acquisition is designed to have a short first echo time (˜2 ms) and echo-spacing (˜1 ms) in order to acquire multiple sampling points during the fast decay of the myelin water signal. Multi-compartment analysis is then applied to the FID in each pixel using a 3-pool model of white matter to obtain quantitative maps of the myelin water fraction. Using this technique, the MR data for whole brain mapping of the myelin water can be acquired in less than 10 minutes, making this technique feasible for routine clinical applications.

A wireless communication system has a first operation mode (GSM mode) for amplifying a phase-modulated high frequency signal with a high frequency power amplifier circuit and a second operation mode (EDGE mode) for amplifying a phase and amplitude-modulated high frequency signal with the amplifier circuit. The amplifier circuit has an input of a high frequency signal, with the amplitude and frequency being fixed in both the first and second operation modes, and operates by being controlled for the bias state of each amplifying stage in accordance with the output control signal produced by a control circuit based on the demanded output level (Vapc) and the detected output level (VSNS) so that the amplifier circuit performs signal amplification to meet the demanded output level.

A composite high-frequency component includes a diplexer arranged to separate / combine transmission / reception signals in frequency bands of a plurality of communication systems, transmit / receive switches, filters, and a balanced-unbalanced reception signal switch, and a matching circuit. The balanced-unbalanced reception signal switch includes a reception signal switch and balanced-unbalanced filters. A stripline in the transmit / receive switch and a stripline in the reception signal switch are provided on the same layers, and the matching circuit including capacitors is arranged between the transmit / receive switch and the reception signal switch.

In an optical disk apparatus and a disk rotation speed control method thereof, enabling to rotate a disk at high speed, with stability and certainty, irrespective of mass eccentricity thereof, detection is made on the greatest value and the smallest value on the signal after conducting a process of a band pass filter 511 on a lens error signal in a step response of a pickup, with using a wobble signal in the place of a tracking error signal and chaining an offset, when controlling the rotation speed of the apparatus by loading an optical disk therein, and thereafter, determination is made on whether the disk rotation speed be shifted to the high speed or not, upon basis of a value obtained through comparison of the maximum value (Max_spnup) and the minimum value (Min_spnup) obtained with the greatest value (Max_step) and said smallest value (Min_step) memorized, when shifting the disk rotation to the high speed.X=(Max—spnup−Min—spnup) / (Max_step−Min_step)

A Micro ElectroMechanical System (MEMS) switch is provided. The MEMS switch includes a ground, a moving unit moveable according to a driving signal, for connecting the input to the output or disconnecting the input from the output, and an electrode unit arranged in the configuration of a protrusion formed on a portion of the round, to induce a leakage signal generated between the input and the output to move toward the ground.

A workpiece chuck includes a thermal plate assembly which includes both heating and cooling capability. The heating element can be a resistive heater in a coiled configuration disposed in a plane. The cooling can be performed via a cooling fluid circulated through cooling tubes which are also disposed in a coiled configuration in a plane. The plane of the heating element and the cooling tubes can be the same plane, and that plane can be a center plane of the thermal plate assembly. By locating the heating and cooling in the same plane, uniform heating and cooling are achieved. Also, by locating the heating element and cooling tubes in the center of the thermal plate, distortions such as doming and dishing in the thermal plate are eliminated such that the wafer can be held extremely flat on the chuck. The heating element and cooling tubes are coiled in an interleaved fashion to provide uniform heating and cooling while allowing them to simultaneously occupy the same plane.

An object of the present invention is to provide an antenna switch circuit that effectively reduces signal leakages at a cross point even at higher operating frequencies and a high frequency module containing said antenna switch module. The antenna switch circuit comprises: a high frequency signal line to transmit a transmitting signal to be input to transmitting terminals to an antenna terminal and also to transmit a receiving signal to be input to the antenna terminal to receiving terminals; switches that are connected in the middle of the high frequency signal line between transmitting terminal and antenna terminal; switches that are connected in the middle of the high frequency signal line between receiving terminal and antenna terminal; and signal lines to transmit control signals for controlling turning on and off of the switches.

Disclosed is a substrate integrated waveguide coupler. The substrate integrated waveguide coupler according to the present invention includes: a substrate; an upper conducting plate applied to an upper portion of the substrate; a lower conducting plate applied to a lower portion of the substrate; two peripheral via holes disposed parallel to each other on both sides of the substrate, respectively, and being of a pipeline type electrically connecting the upper conducting plate and the lower conducting plate to each other; and an inner via hole disposed between the two peripheral via holes, and having a center thereof separated by a preset distance and forming a short slot functioning to couple input signals.

The invention discloses a coplanar waveguide structure applying microwave photonic crystal. The structure comprises a dielectric layer (3) for high-frequency transmission, a photonic crystal ground plane (2) for limiting electromagnetic wave and a central conductor (4) for transmitting the electromagnetic wave, wherein the photonic crystal ground plane (2) is formed by connecting a plurality of microwave photonic crystal unit structures (1), is positioned above the dielectric layer (3) and is tightly combined with the dielectric layer (3); the central conductor (1) is an L-type 50 ohm copper conducting wire; the middle position of the conducting wire is bent for 90 degrees; and the central conductor (4) is positioned above the dielectric layer (3) and tightly combined with the dielectric layer (3). The provided coplanar waveguide structure applying the microwave photonic crystal effectively reduces the signal leakage, simplifies a preparation process to enable the process to be more suitable for monolithic microwave integration, and can improve the transmission coefficient of the real-coplanar waveguide.

The invention provides a liquid crystal screen with low electromagnetic leakage. According to the liquid crystal screen with the low electromagnetic leakage, a layer of shielding film fits the surfaceof a liquid crystal panel and the conducting face of the shielding film is in lap joint with a liquid crystal screen metal frame to achieve shielding of a display area and reduce the signal leakage of the display area; the back face of the liquid crystal screen is a metal shell formed by stamping integrally and buckled with the metal frame together to cover the liquid crystal panel and a drive circuit board, contacts are set on the buckled face to reduce contact resistance, external connectors of the drive circuit board of the liquid crystal screen all adopt connectors with metal shells, themetal shells of the connectors are in lap joint with a metal shell of the liquid crystal screen, and gridiron contacts are set on the lap joint face to achieve good lap joint; a wiring connector adopts the connector with the metal shell, after the wiring connector is inserted into the connector of the drive circuit board of the liquid crystal screen, the metal shells of the wiring connector and connector of the drive circuit board of the liquid crystal screen are in lap joint, conductive cloth are pasted on the outer portions of the metal shells, thereby reducing the signal leakage of cables and connectors.

A physical quantity sensor includes a first sensor element, and an outer edge portion arranged in at least part of the outer periphery of the first sensor element, and a first groove extending in a first direction provided in the outer edge portion in a plan view of the outer edge portion.

The invention relates to the field of information automated management used for refueling devices of a gas station, and discloses a multiprotocol oil machine communication concentrator comprising a bus control device, same-direction bus driving devices, a reverse-direction bus driving device, optical coupler isolation devices and a communication interface device. The bus control device is respectively connected with the same-direction bus driving devices and the reverse-direction bus driving device. The optical coupler isolation devices are connected between the same-direction bus driving devices and the communication interface device and connected between the reverse-direction bus driving device and the communication interface device respectively. The invention also discloses a multiprotocol oil machine communication method. Advantages of the multiprotocol oil machine communication concentrator are that the multiprotocol oil machine communication concentrator is simple in circuit structure, great in compatibility, compatible with various existing communication protocols, higher in anti-interference capability, high in security and higher in application value.

A fully-integrated tuner for performing signal channel selection and image rejection in an analog cable television system is provided. Various embodiments disclose a tuner including an analog RF section to process an analog RF input signal and generate complex low intermediate frequency digital signals, and a signal processing section configured to reduce image and signal leakage in the complex low intermediate frequency signals. The signal processing section selects a signal channel of the complex low intermediate frequency signals and suppresses channel components adjacent to the signal channel. In one embodiment, the signal processing section includes a complex digital signal channel select filter to select the signal channel and suppress the adjacent channel components. In other embodiments, the complex digital signal channel select filter selects the signal channel, shapes the selected signal channel to generate a shaped signal channel, and equalizes a group delay of the shaped signal channel.

To provide an optical information recording medium capable of attaining high density recording and reducing the leakage of signals to adjacent tracks (cross-talk). The optical information recording medium includes: a first substrate having a pre-groove; an undercoating layer, a dye recording layer, and a reflective layer provided in this order on the first substrate; and a second substrate bonded to the reflective layer via an adhesive layer or a sticky layer, in which the pre-groove has a track pitch of 0.1 to 0.6 μm and a groove depth of 20 to 200 nm.

The invention discloses a preparation method of a fluorescent aptamer sensor based on conformation entropy driving DNA assembly reaction. The preparation method comprises the following steps: (1) preparing g-CNQDs; (2) preparing Zn-MOF; (3) preparing a g-CNQDs@Zn-MOF solution: synthesizing the g-CNQDs@Zn-MOF solution from the Zn-MOF and the g-CNQDs; (4) carrying out biological functionalization on the g-CNQDs@Zn-MOF: connecting an MB chain to the g-CNQDs@Zn-MOF; and (5) forming the fluorescent aptamer sensor. The sensor is used for detecting the novel coronavirus, and analysis can be completed within 30 min.

The invention relates to a waveguide filter with a welding structure. The waveguide filter comprises a cavity and a cover plate, wherein the cover plate is arranged above the cavity; and the waveguide filter is characterized by also comprising a tin soldering layer, wherein the tin soldering layer is arranged between the cover plate and the cavity; and the shape of the tin soldering layer is the same as that of the upper surface of the cavity. Compared with the prior art, the waveguide filter has the advantages of effectively reducing the signal leakage, along with simple structure, reliable performance, low cost and the like.

The invention provides a transmission line, which includes a first grounding layer, a second grounding layer spaced apart from the first grounding layer, and a third grounding layer located between the first grounding layer and the second grounding layer. The transmission line is characterized in that the transmission line also includes a micro-strip line signal line for transmitting signals, a conductive blind hole electrically connected with the micro-strip line signal line, and a strip-line signal line electrically connected with the micro-strip line signal line through the conductive blind hole; the third grounding layer is provided with an avoidance slot, and the strip-line signal line is located in the avoidance slot; the micro-strip line signal line is located on one side of the third grounding layer away from the first grounding layer; the conductive blind hole is located between the second grounding layer and the third grounding layer, and one end of the conductive blind hole extends into the avoidance slot; and the first grounding layer is provided with a tuning blind hole which extends towards the conductive blind hole, and a parasitic capacitor is formed between the tuning blind hole and the conductive blind hole. By setting the tuning blind hole, the problems of differential loss mutation and signal leakage at the conductive blind hole can be reduced.

A cable television tuner includes a metal cabinet having compartments isolated from first to fourth. In the first to fourth isolated cells, a data circuit, an input filter circuit, a first mixer circuit, a first local oscillator circuit, a first intermediate frequency circuit, and other components are accommodated. In the fifth isolated chamber, a second intermediate frequency circuit and an integrated circuit including a second local oscillator circuit are housed. According to such a structure, the present CATV tuner is defined as an up / down tuner. A third isolated cell containing the first local oscillator circuit and a fifth isolated cell containing the second local oscillator circuit are disposed adjacent to each other. Both the transmission line and the terminals are used by the first PLL circuit and the second PLL circuit.

The invention discloses a modified detection coil, comprising an integration structured detection coil frame (9), detection coil shielding plates (10) arranged at two sides in the width of the detection coil frame (9), and a detection coil wave guiding tube (13). The detection coil frame (9) is provided therein with a containing cavity. The containing cavity is provided therein with an adjustable capacitor (12) and a detection coil framework (11). One end of the adjustable capacitor (12) is fixedly arranged on the front end plate (9-3) of the detection coil frame (9) and the other end extends towards the containing cavity. One end of the detection coil framework (11) is fixedly arranged on the back end plate (9-4) of the detection coil frame (9) and the other end extends towards the containing cavity. One end of the detection coil wave guiding tube (13) is fixedly arranged on the front end plate (9-3) and the other end extends to the exterior part of the detection coil frame (9). The detection coil provided by the invention is simple in structure and can achieve an improved shielding effect.

A continuous wave radar system comprises a substrate, a transmitter disposed on the substrate, a receiver disposed on the substrate, and an isolating device comprising a plurality of metal plates parallelly disposed on the substrate between the transmitter and the receiver for isolating leakage signal transmitted from the transmitter to the receiver. The metal plates are grounded with the transmitter and the receiver via electrical connection between the metal plates and the substrate. The metal plates are so arranged that an eddy current induced in each of the metal plates is directed away by grounding when the leakage signal passes through the metal plates.

A signal isolation structure for electromagnetic communication is disclosed. Methods, systems, and apparatus for EM isolation structures. One of the devices includes a communication module comprising: a printed circuit board; a plurality of integrated circuit packages, each integrated circuit package including at least one transmitter, receiver, or transceiver; and one or more metal barrier structures configured to at least partially surround a corresponding integrated circuit package of the plurality of integrated circuit packages, wherein each metal barrier structure is configured to reduce signal leakage from the corresponding integrated circuit package.