30results about How to "Avoid cross-coupling" patented technology

Described is a method wherein a seal ring is formed by patterning multiple layers each comprised of a dielectric layer with conductive vias covered by a conductive layer. Discontinuities are made in the seal ring encapsulating an integrated circuit. There are no overlaps between different sections of the seal ring thereby reducing coupling of high frequency circuits in the seal ring structures. In addition, the distance between signal pads, circuits and the seal ring are enlarged. Electrical connection is made between deep N-wells and the seal ring. This encapsulates the integrated circuit substrate and reduces signal coupling with the substrate.

The present invention relates to an integrated Doherty type amplifier arrangement and an amplifying method for such an arrangement, wherein a lumped element hybrid power divider (12) is provided for splitting input signals of main and peak amplifier stages (20, 30, 40) at predetermined phase shifts and non-equal division rates and at least one wideband lumped element artificial line (Zl, Z2) combined with wideband compensation circuit for receiving said first amplified signal and for applying said predetermined phase shift to said first amplified signal and its higher harmonics. Thereby, the low gain of the peak amplifier is compensated by providing the non-equal power splitting at the input. Moreover, the use of the lumped element hybrid power divider leads to an improved isolation between the input ports of the main and peak amplifiers decreasing final distortions of the output signal.

The invention discloses an electric automobile wireless charging method and system based on a double transmission-double picking mode. The electric automobile wireless charging method based on the double transmission-double picking mode comprises the steps of inputting direct current voltage into two inverter circuits; enabling an output end of the first inverter circuit to load high frequency alternating current to a first primary side transmitting coil through a first primary side resonance circuit so as to generate a high frequency magnetic field; generating electric energy after sensing the high frequency magnetic field through a first secondary side picking coil; inputting the electric energy into a first buck-boost converter through a first secondary side resonance circuit and a first rectification filter circuit; enabling an output end of the second inverter circuit to load high frequency alternating current to a second primary side transmitting coil through a second primary side resonance circuit to generate a high frequency magnetic field; generating electric energy after sensing the high frequency magnetic field through a second secondary side picking coil; inputting theelectric energy into a second buck-boost converter through a second secondary side resonance circuit and a second rectification filter circuit; converting the electric energy into load electric energyby using the two buck-boost converters; and outputting the load electric energy to a series-connected load.

The invention relates to a sensor of a micro-electromechanical system (MEMS), in particular to a high-gravity (g) acceleration sensor in a plane of the MEMS based on a resonance tunnelling structure (RTS), which solves the problems that the structure of the conventional MEMS high-g acceleration sensor cannot realize horizontal acceleration measurement and a detection result is easy to influence by a temperature. The high-g acceleration sensor in the plane of the MEMS based on the RTS comprises a silicon-based frame and a quality block, wherein two sides of the quality block are fixed with the silicon-based frame respectively by an independent supporting beam and two combination beams; the independent supporting beam is arranged along a central line of the quality block; the two combination beams are symmetrical about the central line of the quality block which is taken as a symmetry axis; each combination beam comprises a detection beam and two connection beams; a strain pressure sensitive element is arranged on the detection beam; the thickness and width of the detection beam are smaller than those of the connection beams; and the independent supporting beam, the quality block and the connection beams in the combination beams are equal in thickness. The acceleration sensor can realize the horizontal acceleration measurement and is reasonable and simple in structure, simple in process, and less influenced by an environmental temperature, works normally in a high-temperature environment, realizes three-axis integration easily and is applied to measurement of an impaction acceleration with a high-g value.

The invention relates to a bi-axial MEMS in-plane high-g sensor based on a micro beam detection structure. By means of the bi-axial MEMS in-plane high-g sensor, acceleration measurement in the horizontal direction can be achieved. The bi-axial MEMS in-plane high-g sensor comprises a silica-based supporting frame and four sensitive structures, wherein the silica-based supporting frame comprises a silica-based frame and a central anchor block fixedly connected to the surface of the silica-based frame, the four sensitive structures are evenly distributed around the central anchor block, and every four voltage dependent resistors in the same axial direction form a Wheatstone full bridge. Detection can be carried out in the X direction and the Y direction through two different units respectively, namely, two independent detection units in the X direction and the Y direction, and therefore measurement of high-g acceleration signals in the horizontal plane can be achieved. The bi-axial MEMS in-plane high-g sensor is reasonable and simple in structure, low in transverse sensitivity, easy to integrate, good in sensitivity and overload resistance and suitable for measuring the high-g impact acceleration, and the machining process is simple.

The invention discloses an inertial measurement system based on a high-integration-level accelerometer. The inertial measurement system comprises three orthorhombic all-optical-fiber inertial measurement units, wherein each all-optical-fiber inertial measurement unit consists of an accelerometer and a closed-loop optical fiber gyroscope; the three closed-loop optical fiber gyroscopes share one light source; and a free port of a coupler in each closed-loop optical fiber gyroscope supplies an input light source to the corresponding accelerometer. By adopting a multi-path multiplexing technology, the three accelerometers share one detector, so cross coupling is avoided and five light sources and two detectors are saved, the integration level, the stability and the reliability are improved, and low cost, low power consumption and minimization are realized.

The invention improves Techebyshev type microwave filter. Its basic structure adopts distributive coupling line structure. The length of (2)-(N-1) node micro wave transmission line in the middle is 1/4 wave length of designed frequency, and one end of the transmission line connects to ground via micro through-hole (V2-VN-1). The both end of two node in head and end(1),(N)micro wave transmission line connects to ground via micro through-hole (V1,V1'),(VN,VN'). The signal coupling adopts tapped line structure (T1, T2). The distance from (T1, T2) to(V1,V1'),(VN,VN')is L1,L2. By adjusting L1 and L2, implement two transmission zeros at appropriate frequency point and improve outband rejection property.

A phased array antenna system with two dimensional scanning includes a two dimensional array A of antenna elements A_1,1 to A_12,12 arranged in lines; each line is associated with a respective first rank corporate feed network 16₁ to 16₁₂ having outputs 17_1,1 to 17_12,12 connected to respective antenna elements A_1,1 to A_12,12 and inputs for variable relative phase input signals. These corporate feed networks each have first and second inputs A1/B1 to A12/B12 connected respectively to outputs 17_{1 CD}/17_12CD to 17_1EF/17_12EF of different second rank corporate feed networks 16_CD and 16_EF. The corporate feed networks 16₁ to 16_EF convert input signals of variable relative phase into relatively greater numbers of output signals for a phased array. The system (30) includes a phase varying circuit 40 for varying phase differences between input signals to each second rank corporate feed network 16_CD or 16_EF and between input signals to different second rank corporate feed networks 16_CD and 16_EF to provide control of antenna beam direction in two dimensions.

The invention provides an electric energy and signal parallel wireless transmission system based on multi-modulation-wave composite SPWM control. The electric energy and signal parallel wireless transmission system comprises a primary circuit and a secondary circuit. In the primary circuit, high-speed serial bits form n paths of parallel binary sequences through an encoder, the n paths of parallelbinary sequences are sent to a multi-modulation-wave composite SPWM control circuit to be subjected to amplitude modulation, then composite pulse waves are output based on SPWM control, and a composite high-frequency current is generated in a primary coil in a magnetic coupling coil. In the secondary circuit, a secondary coil and a secondary electric energy compensation capacitor form an electricenergy transmission channel, electric energy modulation wave frequency components in the composite high-frequency current are separated to supply power to a load resistor, a signal separation channelnetwork separates n paths of signal modulation wave components with different frequencies, and a signal demodulation circuit network demodulates signals and then sends the signals to a decoder to recover high-speed serial bits. According to the invention, no cross coupling interference and stable parallel synchronous transmission of electric energy and multiple paths of signals are realized, andthe signal transmission rate is effectively improved while the stability of the electric energy is ensured.

The invention relates to a waveguide display element comprising a waveguide body and an in-coupling grating (21) arranged to the waveguide body. The in-coupling grating (21) is configured to couple incoming light into the waveguide body into two separate directions (26A, 26B) using opposite diffraction orders (IC:+1, IC:−1) for splitting the field of view of the incoming light. Further the in-coupling grating (21) is configured, typically by setting its period suitably short, such that said coupling takes place only at wavelengths below a threshold wavelength residing in the visible wavelength range. The invention also relates to a waveguide stack (51 A, 51 B, 51 C).

The invention relates to a position sensor (100) for an electronic position measuring device (1000), said position sensor (100) comprising a signal generation device (110) for generating a periodic magnetic signal (S), and an electric power supply device (120) for supplying the signal generation device (110) with electric energy. The position (x) of the position sensor (100) is determined by means of the position measuring device (1000).

A sensor switch including a first sensor electrode and a second sensor electrode at least partially surrounding the first sensor electrode. An evaluation and control circuit of the sensor switch is configured to generate a switch output signal if a first sensor electrode attenuation signal indicates a high signal attenuation, a second sensor electrode attenuation signal indicates a low signal attenuation, and a cross-coupling signal from the first to the second electrode indicates a low cross-coupling.

The invention relates to the technical field of sensing, and discloses a two-parameter in-situ sensor based on a waveguide grating, a sensing system and a preparation method.The sensor comprises an optical waveguide substrate, and a first straight optical waveguide and a second straight optical waveguide are arranged in the optical waveguide substrate in parallel; the two ends of the first straight optical waveguide are connected with the first transmission optical fiber and the second transmission optical fiber respectively, the two ends of the second straight optical waveguide are connected with the third transmission optical fiber and the fourth transmission optical fiber respectively, and the first straight optical waveguide is provided with a first Bragg grating. A second Bragg grating and a third Bragg grating are separately arranged on the second straight optical waveguide, a miniature air groove is formed in the upper surface of the optical waveguide substrate, and the miniature air groove is located between the second Bragg grating and the third Bragg grating. The temperature-sound time-space synchronous in-situ measurement is realized, and the measurement precision is improved.