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

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.

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 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.

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.

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.

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 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.