49results about "One-port networks" patented technology

A transistor device package includes a component assembly comprising an interconnect structure, a transistor die having a front surface including gate, drain, and source terminal on a first surface of the interconnect structure, and one or more passive electrical components electrically coupled to the gate, drain, and / or source terminal by the interconnect structure. A thermally conductive flange is attached to a back surface of the transistor die, which is opposite the front surface, by a conductive adhesive. Respective patterns of the conductive adhesive are provided on the first surface of the interconnect structure, and least one of the respective patterns of the conductive adhesive provides an input, output, or ground signal path for the transistor device package. Related fabrication methods are also discussed.

The present invention relates to a high-frequency bandpass filter for an MR device, particularly for a transmitting and / or receiving configuration of an MR device, comprising a resonator configuration having a signal input, a signal output, and at least one resonator, wherein each resonator has a capacitor connected in parallel with an inductor, and the inductor comprises a conductive coil body having a substantially HF hermetically sealed cavity. As a result, a high-quality, high-electrical-load-tolerance, and simultaneously low-impedance HF bandpass filter is achieved that can be manufactured simply and at low cost.

A power control circuit comprising a power supply and a load, the load being synthesized by an impedance synthesizer comprising two-terminal impedance elements connected in series and grouped into impedance modules. The impedance elements in each impedance module have equal values, while the impedance elements between modules have a ratio uniquely defined by the number of impedance elements in the impedance module. A plurality of switches associated with the impedance elements short-circuit a selected number of impedance elements under control of a first analog signal, which can be pre-processed by an analytic function. The analog signal is converted to a digital signal by an analog-to-digital converter, then level shifted to control the switches associated with the impedance elements, so that the amount of power delivered to the load can be controlled by the first analog signal. Pulse width modulation is deployed to further control the power by a second analog signal, with the additional benefit of overload protection.

The application discloses a kind of capacitance inductance parity layer layered stack resonator, resonator includes the capacitance, inductance, first port, second port processed on substrate, the multilayer capacitance and multilayer inductance of resonator are layered stack and parallel and between first port and second port, inductance is inside capacitance, defect structure is arranged on each layer of capacitance between the uppermost layer of capacitance and the lowermost layer of capacitance, the via of inductance is vertically connected with the inductance of adjacent layer through defect structure.The application is only occupied with the plane area of one element in capacitance and inductance, with the characteristics of high integration, small size, high temperature resistance and integrated processing, can be applied to the design of passive devices such as filter, coupler with capacitance, inductance series-parallel structure.

The embodiment of the invention discloses an ultrasonic piezoelectric ceramic piece contact state detection circuit. According to one specific implementation mode of the method, the ultrasonic piezoelectric ceramic piece contact state detection circuit is composed of a low-pass filter circuit, a reference voltage setting circuit, an input detection circuit and an LED indicating circuit. According to the embodiment, a stable, efficient and easy-to-use scheme is provided for detecting the contact state of the ultrasonic application equipment and the human body.

The invention discloses a high-voltage-free frequency hopping filter and a manufacturing method thereof, and belongs to the technical field of frequency hopping filters, the high-voltage-free frequency hopping filter comprises a PCB, a 108-225 MHz channel frequency hopping filter and a 225-512 MHz channel frequency hopping filter are arranged on the PCB, the 108-225 MHz channel frequency hopping filter and the 225-512 MHz channel frequency hopping filter are both connected with a GaN chip switch, and the GaN chip switch is connected with a GaN chip. The GaN chip switch is used for driving the frequency hopping filters, and the input ends and the output ends of the 108-225 MHz channel frequency hopping filter and the 225-512 MHz channel frequency hopping filter are connected to the input radio frequency switch and the output radio frequency switch respectively. The GaN chip is used as a switch to drive the frequency hopping filter, so that the power consumption can be reduced, the product size is miniaturized, and the power capacitance value is greatly improved.

According to the present invention, an edgewise coil is maintained in a state of being wound around a core, without performing high-temperature processing.　This noise filter is provided with a core (10) having a form in which an upper flange portion (12) and a lower flange portion (13) are disposed at both axial ends of a shaft portion (11), and a first edgewise coil (22A) and a second edgewise coil (22B) that are disposed so as to coaxially surround the shaft portion (11), wherein at least a portion of each of the first edgewise coil (22A) and the second edgewise coil (22B) overlaps the upper flange portion (12) and the lower flange portion (13) when the shaft portion (11) is viewed in the axial direction.

The invention relates to the technical field of communication equipment, and discloses a frequency hopping filter with a hopping transmission zero point, a hopping control method and communication equipment. At least one resonant inductor of an LC resonant circuit of the frequency hopping filter is connected with a radio frequency switch feedback capacitor array in parallel; the frequency of a transmission zero point at a higher harmonic of the frequency hopping filter is controlled by controlling the opening and closing of a channel where each feedback capacitor in the radio frequency switch feedback capacitor array is located, so that the frequency of the transmission zero point changes along with the center frequency of the frequency hopping filter; and finally, far-end suppression, relative bandwidth stability and frequency hopping accuracy in a wide frequency range are improved.

The embodiment of the invention provides a high-frequency pulse interference detection and suppression method. The method comprises the following steps: extracting a rising edge of an input signal through a rising edge extraction unit; modulating each extracted rising edge into a pulse wave with a fixed pulse width and a fixed amplitude through a first modulation unit; filtering the pulse wave through a filtering unit, and converting the frequency information of the input signal into a voltage signal; comparing the voltage signal with a fixed level through an over-frequency judgment unit, and outputting a judgment result; the over-frequency judgment unit has a hysteretic characteristic; carrying out duration prolonging processing on the judgment result through a second modulation unit, and outputting an over-frequency signal; and controlling the conduction state of the suppression circuit gating switch according to the level of the over-frequency signal. According to the invention, the problems of manufacturing precision and consistency caused by the need of extremely small current and capacitance are avoided, the accurate detection of MHz-level high-frequency interference is realized, the top-speed transmission of signals without interference is ensured, and the unification of high reliability and low delay is realized.

The invention discloses a method and device for inhibiting VFTO based on an adjustable RLC filter circuit, and the method comprises the steps: firstly installing an adjustable RLC filter device at a conducting rod side of a GIS high-voltage switch, collecting VFTO transient overvoltage waveforms at two ends of the high-voltage switch through a high-frequency voltage transformer, and extracting main frequency components through a frequency domain analysis algorithm; the control unit switches the connection mode of an inductance element and a capacitance element in the filter network through a high-voltage switch according to the analysis result, adaptively adjusts the resonant frequency of the filter, and ensures the precise matching of the resonant frequency and the VFTO dominant frequency through iterative optimization; the method solves the problem that an existing suppression method is difficult to give consideration to broadband coverage and simple and convenient structure, has the advantages of being rapid in response, stable in suppression effect and high in adaptability, and can be applied to VFTO dynamic suppression of GIS disconnecting switches or bus key nodes.

This provides an electronic component that can strengthen the ground of a shield. [Solution] The electronic component 1 comprises a base body 2, a shield E covering the end faces 2a, 2b and sides 2e, 2f of the base body 2, a ground terminal located on the main surface 2d and connected to ground, an inductor conductor and a capacitor conductor located inside the base body 2, a shield connecting conductor 19 electrically connecting the shield E located on side 2e and the shield E located on side 2f, and a connecting conductor electrically connecting the shield connecting conductor 19 and the ground terminal.

The invention provides a frequency mixing circuit and communication equipment, relates to the technical field of communication, and can reduce the power consumption of the frequency mixing circuit while realizing frequency mixing. The mixer circuit comprises a first switch tube, a second switch tube and a first filter. The source electrode of the first switch tube is used for being connected with a grounding end; the grid electrode of the second switch tube is connected with the grid electrode of the first switch tube, the grid electrode of the first switch tube and the grid electrode of the second switch tube are used for receiving a local oscillator signal, the source electrode of the second switch tube is connected with the drain electrode of the first switch tube, and the drain electrode of the second switch tube is used for receiving a first signal and outputting a second signal; the second signal is a signal generated after frequency mixing of the local oscillator signal and the first signal; the first end of the first filter is connected with the source electrode of the second switch tube, the second end of the first filter is used for being connected with a grounding end, and the first filter is used for filtering local oscillation signals of the source electrode of the second switch tube.

The present disclosure relates to an impedance matching arrangement (100, 200) comprising a first port (101, 201), a second port (102, 202), a transmission line (103, 109; 203, 228) configured to guide electromagnetic waves between the first and second ports (101, 102; 201, 202), and a movably attached dielectric part (104, 105; 204, 205). The transmission line is formed by a first conductor (103, 203) and a second conductor (109, 228) and comprises a primary section (108a, 108b, 108c; 148a, 148b, 148c; 208a, 208b, 208c) and a secondary section, (106, 107; 146, 147; 206, 207). The dielectric part (104, 105; 204, 205) comprises a dielectric material arranged adjacent to the first conductor (103, 203) and / or the second conductor (109, 228) of a part of the transmission line (103, 109; 203, 228) and arranged movable along the transmission line (103, 109; 203, 228). In absence of the dielectric part (104, 105; 204, 205), the primary section (108a, 108b, 108c; 148a, 148b, 148c; 208a, 208b, 208c) has a primary local characteristic impedance (Z0) and the secondary section (106, 107; 146, 147; 206, 207) has a secondary local characteristic impedance (Z1, Z2) different from the primary local characteristic impedance (Z0).

This suppresses the degradation of attenuation characteristics caused by spurious emissions in the filter device. [Solution] The filter device 100 comprises a laminate 110 in which multiple dielectric layers LY1 to LY14 are stacked, an input terminal T1, an output terminal T2, a ground terminal GND, a first path and a second path, and capacitor electrodes PC20 to PC23. The first path is connected to the input terminal T1. The second path is connected to the output terminal T2. Capacitor electrode PC22 is connected to the first path. Capacitor electrode PC23 is connected to the second path. Capacitor electrode PC20 is connected to both the first and second paths. When viewed from the stacking direction of the laminate 110, at least a portion of capacitor electrode PC20, at least a portion of capacitor electrode PC22, and at least a portion of capacitor electrode PC23 overlap with capacitor electrode PC21.

The invention discloses an optical power acquisition device and method, and relates to the technical field of optical signal detection. The device comprises a photoelectric detector for converting an optical signal into a current signal, a trans-impedance amplifier for converting the current signal into a pulse voltage signal, a peak value detector for detecting a peak value of the pulse voltage signal, an RC filter network for filtering noise of the pulse voltage signal, and a low-frequency amplifier for amplifying a low-frequency pulse voltage signal, the ADC acquisition module is used for converting the amplified pulse voltage signal into a digital signal; the first feedback network is used for adjusting the gain of the trans-impedance amplifier; the second feedback network is used for adjusting the gain of the low-frequency amplifier; the microcontroller is used for controlling the first feedback network to adjust the gain of the trans-impedance amplifier according to the peak value of the pulse voltage signal and controlling the second feedback network to adjust the gain of the low-frequency amplifier according to the digital signal; according to the invention, the collection precision of the optical power can be improved.

This invention improves the characteristics of LC filters and suppresses their large size. One embodiment of the LC resonator (1A) includes a first planar electrode (102), a second planar electrode (103), a first line electrode (101), a first conducting conductor (111), a second conducting conductor (112), and a third planar electrode (104). The second planar electrode (103) is opposite to at least a portion of the first planar electrode (102) in a specific direction (Z). The first conducting conductor (111) and the second conducting conductor (112) extend from the first line electrode (101) along the specific direction (Z) and are connected to the first planar electrode (102) and the second planar electrode (103), respectively. The third planar electrode (104) is opposite to at least a portion of the second planar electrode (103) in a specific direction. The second planar electrode (103) is disposed between the first planar electrode (102) and the third planar electrode (104) in the specific direction (Z).

The invention relates to a circuit for drift detection in an electrical signal filter, a corresponding apparatus and a method. The switching circuit outputs a modulation signal. The low-pass filter circuit receives the modulated signal and applies a low-pass filtering process at a low-pass cutoff frequency to generate a demodulated signal to the load impedance. The replica circuit receives the modulated signal and generates a reference signal by applying a low-pass filtering process of the low-pass filter circuit. A signal processing circuit applies signal processing to the demodulated signal and the reference signal to generate at least one indicator signal indicating a change in the low-pass cutoff frequency.

The invention belongs to the technical field of plate structure vibration noise, particularly relates to a periodic piezoelectric edge composite vibration reduction superstructure with a double-frequency resonance effect, and provides the following scheme: the periodic piezoelectric edge composite vibration reduction superstructure comprises a substrate, an edge acoustic black hole structure, a viscoelastic damping harmonic oscillator, a piezoelectric patch and a piezoelectric shunt circuit, the edge acoustic black hole structures are arranged to be hollow structures on the two sides of the base plate, the viscoelastic damping harmonic oscillators are arranged to be damping materials filled in the hollow structures, a plurality of steel mass blocks are arranged in the damping materials, piezoelectric patches are arranged at the positions, corresponding to the steel mass blocks, of the edge of the base plate, and piezoelectric shunt circuits are externally connected to the two poles of the piezoelectric patches. And the plurality of steel mass blocks are distributed at equal intervals. The composite vibration reduction superstructure has a dual-energy dissipation and dual-harmonic oscillator metamaterial vibration reduction mechanism, and the vibration reduction and noise reduction effects of the plate structure are further improved.

The invention belongs to the field of satellite communication, relates to the design of a low-noise amplifier, and particularly provides a low-noise amplifier with high out-of-band rejection, which is used for solving many problems caused by a switched capacitor array in the existing low-noise amplifier with high out-of-band rejection. The low-noise amplifier adopts a two-stage cascode structure, and three interference suppression resonant cavities are introduced on the basis of the low-noise amplifier, namely a parallel resonant cavity LCtrap1 formed by LT1 and CT1, a three-coupling transformer T-C formed by Lpri, Lsec, Ltrap and Ctrap, and a parallel resonant cavity LCtrap2 formed by LT2 and CT2; through collaborative optimization of the three resonant cavities, leakage signals of the whole transmitting frequency band are effectively suppressed; and moreover, the use of a switched capacitor array is avoided, and the complexity of digital control is greatly reduced in the application of a fully-integrated silicon-based multichannel receiving phased array chip.

A nonlinear microwave resonator (10) comprises an NbN / AlN / NbN structure in which an NbN thin film is used for a lower layer electrode (2) and an upper layer electrode (4), and in which an AlN thin film is used for a dielectric film (3) that is provided between the lower layer electrode and the upper layer electrode. This structure constitutes a Josephson junction that is formed by using the NbN thin film as a superconductor and the AlN thin film as the dielectric film (3), and the structure functions as a Josephson element (10b). In addition, the structure constitutes a capacitor (10a) that has NbN as an electrode and AlN as a dielectric film (insulating layer), and functions as the nonlinear microwave resonator (10).

An electric field sensor device includes: an antenna device that has a dipole structure that receives an electric field, the antenna device including a first antenna element connected to or in contact with a ground and a conductor existing with a certain resistance value, and a second antenna element grounded to an earth ground or not grounded to an earth ground; a rectifier circuit that rectifies a signal induced in the antenna device; and a detection unit that detects a level of an output voltage of the rectifier circuit. The detection unit detects a change in level of the output voltage caused when the first antenna element or the second antenna element not grounded to an earth ground is spatially coupled to or in contact with another conductor different from the conductor, and detects a state or a situation of the other conductor.

A filter device includes a first LC series resonator to resonate in series at a first series resonant frequency with a first inductor and a first capacitor, and a second LC series resonator to resonate in series at a second series resonant frequency with a second inductor and a second capacitor. The first and second LC series resonators are connected in parallel and resonate in parallel at a parallel resonant frequency. The second series resonant frequency is lower than the first series resonant frequency. The parallel resonant frequency is between the first and second series resonant frequencies.

The invention discloses an asynchronous serial communication method and system based on single-line time coding, relates to the technical field of asynchronous serial communication, and is cooperatively completed by a sending device and a receiving device. A sending end detects the state of a line before communication, and when the line continues to be in an idle state with the low level exceeding 500 microseconds, transmission is initiated. During sending, the data frame is converted into a pulse sequence with a specific width according to a time coding protocol, conflict detection is executed after each high-level pulse, and sending is terminated when a line is found to be pulled down. And the receiving end identifies the communication start by monitoring the start bit pulse pair, so as to calibrate the time sequence of the receiving end. When a data bit is decoded, the pulse width is accurately measured by sampling for multiple times and averaging, and a logic value is judged according to a width range. A pull-up resistor, open-drain output and an RC low-pass filter are combined on hardware to ensure signal quality, and a low-power-consumption mode is supported to enter in an idle state.

To provide substrate supports for processing chambers, and RF grounding structures for use therewith.SOLUTION: A chamber body 102 at least partially defines a processing volume therein. A first electrode is disposed in the processing volume. A pedestal 110 is disposed on a side opposite the first electrode 101, . A second electrode 113 is disposed in the pedestal 110. An RF filter 114 is coupled to the second electrode through a conductive rod 107. The RF filter 114 includes a first capacitor 130 coupled to the conductive rod 107 and to ground. The RF filter 114 also includes a first inductor coupled to a feedthrough box. The feedthrough box 125 includes a second capacitor 136 and a second inductor 134 coupled in series. A direct current (DC) power supply 126 for the second electrode is coupled between the second capacitor 136 and the second inductor 134.SELECTED DRAWING: Figure 1

A variable capacitance element (100) includes a switching section (10) configured as a field effect transistor, and an element section (20) electrically connected to the switching section (10) and configured as a capacitor (passive element). The element section (20) includes a terminal electrode (5a) (first terminal electrode) electrically connected to a source electrode (5), and a terminal electrode (22) (second terminal electrode) configured as a first capacitor (first passive element) between the source electrode (5) and a drain electrode (6), and configured as a second capacitor (second passive element) at least between the drain electrode (6).

The application belongs to the technical field of filter optimization, and discloses an EMI filter optimization method and system based on noise source impedance, which comprises the following steps: measuring noise source impedance corresponding to common mode and differential mode of a transformer and original noise, judging insertion loss demand based on the original noise, and determining a frequency point of interest by using the insertion loss demand; determining a capacitance value of a safety capacitor based on a capacitance value determination rule, analyzing an inductance value required by the frequency point of interest under a topology cluster by using an impedance characteristic value of the safety capacitor after the impedance characteristic value of the safety capacitor is determined according to the capacitance value, and determining a common mode optimal topology; selecting a magnetic core based on a magnetic core selection rule, determining a total differential mode capacitance and a number of turns required by an inductance corresponding to the frequency point of interest according to the magnetic core information, and selecting a differential mode optimal topology by using the total differential mode capacitance; and determining a filter optimization scheme according to the common mode optimal topology, the differential mode optimal topology and the impedance characteristic value. The application realizes the functions of quantitative and accurate optimal topology and parameter optimization design of the filter.

In an electronic component having a first coil and a second coil arranged inside an element body, the coupling coefficient between the first coil and the second coil can be finely adjusted while suppressing an increase in the height of the element body. [Solution] The electronic component (1) includes an element body (3) formed by stacking multiple insulating layers in the Z-axis direction, and a primary coil (L1) and a secondary coil (L2) arranged in the Z-axis direction inside the element body (3). The secondary coil (L2) has multiple wiring patterns (15-19) arranged at intervals in the Z-axis direction. The primary coil (L1) includes multiple wiring patterns (11-14) arranged at intervals in the Z-axis direction, and a gap (GA) arranged in the area sandwiched between adjacent wiring patterns (13, 14). The thickness of the gap (GA) is greater than the distance between adjacent wiring patterns (11-13, 15-19) without the gap (GA) in between.

An electronic filter includes a splitter (14) that is configured to split a signal of interest and an other spectral content onto a first circuit leg (16) and a second circuit leg (18), and a signal generator (32,20, 34) that is configured to generate an activator signal. A first combiner (22) on the first circuit leg is configured to inject the activator signal at a frequency matching the other spectral content, and a second combiner (24) on the second circuit leg is configured to inject the activator signal at a frequency matching the other spectral content. The activator signal in the second circuit leg is phase shifted approximately 180 degrees relative to the activator signal in the first circuit leg. A first frequency selective limiter (26) on the first circuit leg is configured to attenuate both the activator signal and the other spectral content on the first circuit leg by a first dB of attenuation to a threshold power level of the first frequency selective limiter, and a second frequency selective limiter (28) on the second circuit leg is configured to attenuate both the activator signal and the other spectral content on the second circuit leg by a second dB of attenuation to a threshold power level of the second frequency selective limiter. A third combiner (30) is configured to generate a filter output based on combining the attenuated activator signal, the attenuated other spectral content, and the signal of interest from the first frequency selective limiter with the attenuated activator signal, the attenuated other spectral content, and the signal of interest from the second frequency selective limiter. The first and second frequency selective limiters may comprise spin wave limiters which are magnetostatic devices.

Provided are a variable capacitance circuit, a circuit device, and an oscillator that can improve the linearity of a capacitance value change. The variable capacitance circuit includes a capacitor array having a first capacitor in which a plurality of MIM capacitors are connected in parallel and a second capacitor in which a plurality of MIM capacitors are connected in series, and a switch array having a first switch and a second switch. At least one of a shape pattern of a first electrode of the first capacitor, a first ground shield, a second electrode of the second capacitor, and a second ground shield is set in a manner such that a first capacitance difference in each 1 LSB of a first capacitance value with respect to the first capacitor when the first switch is on and off is close to a second capacitance difference in each 1 LSB of a second capacitance value with respect to the second capacitor when the second switch is on and off.

To improve an attenuation characteristic in a non-passage band including a high-frequency band while improving a loss against a signal in a passage band.SOLUTION: In a multiplexer 7B, a first inductor via VH1, a second inductor via VH2, and a third inductor via VH3 form a first inductor LH1, a second inductor LH2, and a third inductor LH3, respectively. A fourth inductor via VH4 forms a fourth inductor LH4. A fifth inductor via VH5 forms a fifth inductor LH5. A sixth inductor via VH6 forms a sixth inductor LH6. At least one of the fourth inductor via VH4, the fifth inductor via VH5, and the sixth inductor via VH6 is arranged in a boundary region 74 of a first filter 71B and a second filter 72B.SELECTED DRAWING: Figure 22