10 results about "Switched filters" patented technology

The application discloses a kind of semi-integrated miniaturized LC filter, preparation method and switch filter group, the LC filter includes ceramic substrate, ceramic substrate is made of top layer, middle layer and bottom layer, wherein multiple capacitors are integrated in ceramic substrate middle layer by LTCC process, pad is provided on the surface of ceramic substrate top layer, multiple inductors are welded on pad;All inductors form the required circuit connection by pad and capacitor, rectangular pad is respectively provided at the left and right ends of ceramic substrate bottom layer, used as the input, output port of LC filter signal, ground pad is provided between the two rectangular pads of ceramic substrate bottom layer, to ensure that LC filter is well grounded.The capacitor is integrated in ceramic substrate in the application, the space occupied by the separated capacitor is saved, and the process is simpler than the process of semi-integrated LC filter and IPD process designed chip LC filter;Small volume separated inductor is used instead of integrated inductor, which can improve the Q value of the filter and reduce the loss.

The utility model discloses a one key presses and switches filter material's water outlet device, including the body that is equipped with the water passing cavity and the water outlet, and the water passing cavity is connected with the water outlet, is equipped with the ejection assembly in the body, and it can axial movement and has the cavity of placing filter material. Ejection assembly realizes the cavity switching in the body through the cooperation of the guide column and the undulating guide groove, and in combination with spring reset and one -way valve check structure ensures that the operation is convenient and safe. The utility model discloses through pressing quick replacement filter material, simplifies the operation step, prevents water flow splashing, optimizes water flow path to fully flush filter material, is applicable to carbonic acid spring wash head and a variety of scenes, has remarkable technical advantage and market application prospect.

The utility model discloses a kind of double filter element devices of three valve control positive and negative washing, it is related to filter relevant technical field.The utility model includes two groups of symmetrically arranged shell;The inside of shell is provided with filter element, and the both ends of filter element pass through towards the two port positions of shell, and the both end surfaces of shell are provided with the sealing cover of sleeve joint in the both end positions of filter element, and three-way valve one is set between the sealing cover above shell, and the both port of three-way valve one is connected with the sealing cover port of similarity by spiral pipe and is screwed, and three-way valve two is set between the both sealing cover below shell, and the lower part of position between two groups of shell is provided with backflush pipe, and the port position of backflush pipe is connected with on-off valve.The utility model is used in cooperation with three-way valve one, three-way valve two and on-off valve, cooperates three-way valve control, so that backwash liquid enters two groups of filter element simultaneously, significantly improves cleaning efficiency, simultaneously realizes switching filter / backflush mode, and simplifies operation.

This invention proposes a packaging model and method for a switching filter, relating to the field of electronic component packaging technology. The packaging model includes a fabricated packaging substrate, a switching chip and a filter chip disposed on the substrate, and a packaging cover covering the packaging shell. The substrate integrates matching circuits and interconnect structures, and the packaging cover is made of electromagnetic shielding material. The packaging method includes steps such as substrate pretreatment, chip mounting, wire bonding, packaging cover soldering, and performance testing. This invention, through optimized packaging structure design, effectively reduces the insertion loss and electromagnetic interference of the switching filter, improves its high-frequency performance and reliability, and is suitable for signal processing systems in fields such as communications and radar.

The invention provides a power converter, a data collector and a PLC system, and belongs to the technical field of PLCs. In the power converter provided by the invention, a first filter, a switching circuit and a switching filter bank are connected in series with a PLC chip and a coupler. And the PLC chip can control the switching circuit to connect one target filter in the switching filter bank with the first filter in series. Since the passbands of the plurality of second filters included in the switching filter bank are different from each other, in different application scenarios, the PLC chip can control the switching circuit to connect the different second filters with the first filter in series so as to form a combined filter with different passbands. Namely, the power converter has multiple selectable working frequency bands, and the working frequency bands can be flexibly switched according to the requirements of application scenes. Therefore, the flexibility of signal interaction between the power converter and the data collector is effectively improved, and the application flexibility of the power converter is effectively improved.

Systems and methods for implementing Soft-duplex functionality in an amplifier in a HFC network.

A signal amplitude equalization circuit based on a switch filter bank is characterized by being provided with a switch filter bank, the signal transceiver end of the switch filter bank being connected to a controller, the switch filter bank being provided with a radio frequency input switch, N filters and a radio frequency output switch; the input end of the radio frequency input switch acquires an original data signal, the radio frequency input switch being provided with N output ends, one output end of the radio frequency input switch being connected to one input end of the radio frequency output switch via one filter, and the output end of the radio frequency output switch outputting a data signal after in-band fluctuation optimization. Effect: The optimization of filter in-band fluctuation can be quickly realized at extremely low cost, which is flexible and efficient, and has extremely high economic benefits and practical value.

The application provides a modular radio frequency receiving front end with fast power-on capability. The modular radio frequency receiving front end comprises a filtering limiting front end, a switch filtering amplification circuit, a power division circuit, a large dynamic SDLVA circuit and an SDLVA power supply circuit, and is connected with each functional module through an SMP joint to realize modular design, detects the performance of each circuit through multi-stage self-checking, increases the isolation degree between the SDLVA chip and the rear-stage operational amplifier circuit through an operational amplifier, and provides the power supply voltage of the ns level rising edge for the SDLVA detection module, so as to reduce the complexity of the radio frequency signal interconnection and the power supply control wiring of the multi-channel receiving front end, and has the characteristics of modular design, high sensitivity, high reliability, strong universality and the like.

The utility model discloses a kind of multi-channel adaptive filtering systems for water quality analysis pretreatment, including sampling pipe and controller;The input end of the sampling pipe is equipped with water quality monitoring module connected with controller signal, and the output end of sampling pipe is equipped with multistage filtering module and bypass component;The utility model passes through water quality monitoring module real-time acquisition inlet water turbidity, COD etc. Index, controller is automatically switched filtering path according to preset multistage threshold value, unnecessary fine filtration is reduced through bypass component, avoid filter element and plug in advance due to excessive interception suspended solids;Through water quality detection condition intelligent switching, improve filter element service life, reduce equipment operation energy consumption;With higher practical value.