19 results about "Resonator filter" patented technology

One example includes an acoustic resonator filter system. The system includes a filter element arranged between a low-voltage rail and a filter-path node through which an RF input signal propagates to provide a filtered RF output signal. The filter element includes an acoustic resonator and a capacitive network arranged in parallel with the acoustic resonator.

The application discloses a manufacturing method of a resonant filter. The method comprises the following steps: manufacturing a first substrate and a resonant filter structure, wherein the resonant filter structure is formed on a first side of the first substrate, the resonant filter structure comprises a bulk acoustic wave resonant structure and a Lamb wave resonant structure, the bulk acoustic wave resonant structure and the Lamb wave resonant structure are electrically connected, the bulk acoustic wave resonant structure comprises a first electrode structure, the Lamb wave resonant structure comprises a second electrode structure, the second electrode structure comprises a first interdigital electrode and a second interdigital electrode, the first electrode structure and the second electrode structure share a same first electrode layer, the first interdigital electrode is electrically connected with the outside, and the second interdigital electrode is electrically connected with the first electrode structure.

A coupled resonator filter including a first parallel resonator including a first capacitance connected in parallel with a first inductance. The filter includes a second parallel resonator including a second capacitance connected in parallel with a second inductance and a third parallel resonator including a third capacitance connected in parallel with a third inductance. Magnetic coupling between the first inductance and the second inductance, between the second inductance and the third inductance, and between the first inductance the third inductance occurs in accordance with first, second and third coupling factors, respectively. A frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.

Hybrid lattice filters with acoustic baluns are disclosed. In one aspect, a hybrid lattice filter may be formed using acoustic elements. The hybrid lattice filter may operate with acoustic baluns such as coupled resonator filters (CRF) or stacked crystal filters (SCF). To achieve the desired common mode rejection, an additional rejection or low common mode intermediate impedance network may be supplied between the acoustic balun and the hybrid lattice filter. By combining the acoustic balun with the low common-mode intermediate impedance network and the hybrid lattice filter, a passband filter with a desired bandwidth may be created.

A coupled resonator filter including a first parallel resonator including a first capacitance connected in parallel with a first inductance. The filter includes a second parallel resonator including a second capacitance connected in parallel with a second inductance and a third parallel resonator including a third capacitance connected in parallel with a third inductance. Magnetic coupling between the first inductance and the second inductance, between the second inductance and the third inductance, and between the first inductance the third inductance occurs in accordance with first, second and third coupling factors, respectively. A frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.

The present invention relates to a fault signal detection system of target equipment using a resonance filter, which can precisely detect a fault signal of a coil in the target equipment regardless of frequency resolution, and can greatly improve a signal-to-noise ratio. To this end, provided is a detection device which detects a fault signal that may occur in a target coil (30) of the target equipment, comprising: a tuning capacitor (150) which is connected in series between a coil power source (120) and a coil inductor (160) with respect to a coil power source (120), the coil inductor (160), and a coil resistor (180) of the target coil (30), and is capable of tuning a frequency of the resonance filter; and a matching capacitor (140) which is connected to the coil power source (120) in parallel and can be matched with the frequency of the resonance filter, and thereby, a signal-to-noise ratio (SNR) may be further increased when the fault signal in the frequency domain passes through the resonance filter.

Structures for a micro-ring resonator filter and methods of forming a structure for a micro-ring resonator filter. The structure comprises a bus-ring coupling section including a first Mach-Zehnder interferometer, and a micro-ring resonator section including a ring resonator coupled to the first Mach-Zehnder interferometer. The ring resonator includes a second Mach-Zehnder interferometer.

The application discloses an energy generator topology and a control method thereof, and belongs to the field of energy generator design. The energy generator topology comprises an adjustable DC power supply, an input capacitor, an H-bridge circuit, a resonance filter, a current sampling transformer and a controller. The adjustable DC power supply outputs electric energy to an external bipolar plasma knife through the input capacitor, the H-bridge circuit and the resonance filter. The current sampling transformer collects the current value of the resonance filter output to the bipolar plasma knife in real time and outputs the current value to the controller. The controller receives the current value and determines the load state of the bipolar plasma knife. According to the load state, the working frequency of the switching device of the H-bridge circuit is controlled, so that the energy generator provides adaptive electric energy output for the bipolar plasma knife. The application can reduce the high current stress and thermal stress impact of high peak power on the energy generator, thereby greatly reducing the volume of the energy generator.

A galvanometer motor control method based on resonant filtering and a Luneburg observer, relating to the field of motor control, is disclosed. The drive control system of the galvanometer motor includes a position PI controller, a resonant filter, a speed PI controller, a current PI controller, and a DA conversion drive circuit connected in sequence, and a Luneburg observer positioned between the resonant filter and the speed PI controller. The method includes the following steps: the position PI controller processes position-related information; the resonant filter performs resonant filtering on the parameters output by the position PI controller; the Luneburg observer introduces an observation gain matrix to stabilize itself and estimates the speed; and the speed PI controller processes the speed estimate to generate the voltage controlling the galvanometer motor. This invention employs coordinated control of position, speed, resonant filter, Luneburg observer, and current, enhancing the system's dynamic performance, reducing inter-loop coupling effects, and improving control accuracy.

Technologies are described for a light emitting diode (LED) driver configured for powering LED(s) and having a wide input voltage range between about 100V and about 528V, high power factor, low total harmonic distortion (THD), and low output current ripple load. The LED driver has a single stage buck-boost type converter with output current regulation, an output current regulation circuit, a ripple control circuit having a transient voltage suppressor (TVS) and a parallel resonant LC filter, a power factor correction (PFC) control circuit having a digital compensation block, a PFC controller, and a gate drive IC.

Provided is an elastic wave device having an elastic wave resonator and a longitudinal coupling type elastic wave resonator filter, which can more effectively suppress a lateral mode. An elastic wave device (1) has an elastic wave resonator (5) and a longitudinal coupling type elastic wave resonator filter (6), and the length of the first and second edge regions (C1, C2) in the IDT electrode, which is the dimension in the direction in which the electrode fingers (21, 22) extend, is set shorter in the longitudinal coupling type elastic wave resonator filter (6) than in the elastic wave resonator (5).

A linear waveguide layer (22), a coupling layer (21), and an annular waveguide layer (23) are continuously formed on a semiconductor substrate (9). The annular waveguide layer (23) and the coupling layer (21) are etched to form an annular waveguide (8). The linear waveguide layer (22) is subjected to anisotropic wet etching to form a linear waveguide (7). The ring waveguide (8) and the linear waveguide (7) are optically coupled via a coupling layer (21) to constitute a ring resonator filter (5). When anisotropic wet etching is performed on the linear waveguide layer (22), the linear waveguide layer (22) below the annular waveguide (8) is removed in a region not covered by the linear pattern (25) using a chemical solution having selectivity in the direction in which the linear pattern (25) extends with respect to the linear waveguide layer (22).

The application relates to a high-Q resonant filter based on an LTCC process, the most core part of the architecture is composed of a resonant unit A, a resonant unit B and an inter-stage coupling unit to form a basic resonant coupling filter unit, wherein the resonant unit innovatively introduces multiple hole columns in parallel to form an equivalent large via, thereby greatly improving the Q value of resonant inductance, and by adjusting the size of the hole column coil and the distance between the hole column coils, the magnetic coupling strength of adjacent resonant units can be adjusted, and by further adjusting the size of the inter-stage coupling capacitor, the overall coupling strength of the inter-stage coupling unit can be flexibly adjusted, and the cross-stage coupling capacitor can be flexibly adjusted to deepen the single-side rectangular coefficient; in addition, the application adopts a mirror-symmetrical layout mode in the internal structure, reasonably optimizes the internal space structure, reduces the design and debugging difficulty and avoids errors in the production process, so that the high-Q LC resonant coupling filter has better controllability and a better rectangular coefficient.

A composite filter device includes first and second filter chips mounted on an upper surface of a substrate by first and second conductive bonds. The first filter chip includes a longitudinally coupled resonator filter. The second filter chip does not include a longitudinally coupled resonator filter. A height of the first conductive bond is lower than a height of the second conductive bond.

The invention discloses an adjustable resonant filter and a communication system, and relates to the technical field of communication, and the disclosed tunable filter comprises an optical resonant structure and at least one layer of lithium niobate film. The lithium niobate thin film is arranged in an optical resonance structure; the lithium niobate film is electrically connected with the electrode; the tuning voltage applied by the electrode is received through the lithium niobate film, and the refractive index is changed based on the electro-optical effect generated by the tuning voltage, so that the resonant wavelength of the optical resonant structure is adjusted. The electro-optical effect of the lithium niobate film is directly utilized, and the refractive index of the lithium niobate film can be instantaneously changed by applying an electric field, so that tuning of resonant wavelength is realized, physical process time required by mechanical movement or an electrothermal effect is avoided, and the response speed is effectively improved.

An acoustic wave filter having a coupled resonator filter is provided. The acoustic wave filter includes an acoustic coupling unit, a first unit of resonators disposed on a first side of the acoustic coupling unit, and a second unit of resonators disposed on a second side, opposite the first side, of the acoustic coupling unit. The first unit of resonators and the second unit of resonators are in an acoustic communication. The first unit of resonators includes a first resonator and a second resonator electrically coupled to the first resonator. The first resonator comprises a first electrode and a second electrode, and wherein the second electrode of the first resonator is disposed adjacent to the acoustic coupling unit and is configured to receive a signal input. A wireless device may include the acoustic wave filter.

Provided is a quadruple-mode resonator capable of having a reduced resonator height. In this quadruple-mode resonator 1, electromagnetic field energy is confined in an outer peripheral conductor 2 forming a rectangular parallelepiped having a height smaller than the length and width thereof. The quadruple-resonant modes are the four modes of TM120, TM210, TE101, and TE011, with the height direction as the propagation direction of electromagnetic waves. A cross-shaped conductor plane pattern 3 is horizontally disposed at the center portion of the outer peripheral conductor 2. Inter-TE mode coupling conductors 4 are provided that each have one end connected to a side surface of the outer peripheral conductor 2 and are disposed horizontally. TM / TE mode coupling conductors 5 are provided that each have two ends connected to the lower surface and a side surface of the outer peripheral conductor 2. Two electric field probe input / output terminals 6 are provided that are insulated from the outer peripheral conductor 2 and inserted into the outer peripheral conductor 2 through the upper surface thereof.

The invention relates to the technical field of circuits, in particular to a resonator filter structure based on a supporting structure, a filter and electronic equipment. The resonator filter structure based on the supporting structure comprises a substrate and a circuit structure integrated on one side of the substrate, the substrate comprises a resonator region and a capacitor region; the resonator area is provided with a resonator circuit structure, and the capacitor area is provided with a capacitor structure; an acoustic mirror in the resonator circuit structure and a capacitor dielectric layer of the capacitor structure are air; one electrode layer of the capacitor structure and one electrode layer of the resonator circuit structure are connected with each other, and are formed through the same deposition process after deposition and graphical processing; the resonator circuit structure comprises at least one resonance unit; the resonator filter structure based on the supporting structure further comprises the supporting structure used for supporting the upper electrode layer of the capacitor unit in the capacitor structure.

The invention relates to the technical field of filters, and discloses a duplexer and a communication device.The duplexer comprises a sending filter and a receiving filter, and at least one of the sending filter and the receiving filter comprises a coupling resonant filter, at least one first impedance element filter and a functional unit, the coupling resonant filter comprises a plurality of first resonators arranged along a first direction; the at least one first impedance element filter is arranged on at least one side of the coupled resonant filter in the second direction, and a blank area exists on at least one side of the coupled resonant filter in the first direction; the functional unit is located in the blank area, and the functional unit is electrically connected with at least one of the coupling resonance filter and the first impedance element filter. According to the invention, by arranging the function unit, the available area on the layout can be fully utilized, the influence caused by mutual coupling of sound wave energy between the coupling resonant filter and the function unit which are arranged side by side can be avoided, and the out-of-band rejection and the isolation degree can be improved.