8results about How to "Solve the pressure drop" patented technology

The invention discloses a manufacturing method of a memory device and the memory device, and the manufacturing method comprises the steps: providing a semiconductor substrate which comprises a substrate and a hard mask layer on the substrate; a plurality of first grooves are formed in the active area of the substrate from the hard mask layer, one part of the first grooves are located in the storage area, the other part of the first grooves are located in the leading-out area, and the parts, in the substrate, of the first grooves are defined as base body grooves; forming a gate insulating layer and a semi-floating gate at the bottom of the groove of the substrate; one part of the semi-floating gate is in contact with the substrate, and the other part of the semi-floating gate is isolated from the substrate through a gate insulating layer; and forming an inter-gate dielectric layer and a first gate layer in the first groove, forming a control gate of the memory unit in the first groove of the memory region, and forming a lead-out wire of the memory unit in the first groove of the lead-out region, namely, enabling the lead-out region to be in contact with the outside, and solving the problem of voltage drop caused by large buried gate resistance.

The invention relates to the technical field of current measurement, in particular to a multi-range current measurement circuit. The multi-level current measuring circuit comprises multi-level current measuring branches, the multi-level current measuring branches work in parallel, the first-level current measuring branch is connected to a TP point, current to be measured flows through the TP point and flows to the multi-level current measuring branches from the TP point, and the current to be measured is decomposed into parallel current of the multi-level current measuring branches to be measured respectively. The first-stage current measurement branch is continuously in a starting state and bears measurement of the minimum current gear, and the measurement voltage of the first-stage current measurement branch serves as a control signal to control starting or stopping of shunting work of all the rear-stage current measurement branches; the parallel connection of each stage of current measurement branch is smoothly connected from small to large from a zero current state, and the parallel quit of each stage of current measurement branch is smoothly quit from large to small to the zero current state. According to the invention, the problems of switch shift current abrupt change and sampling resistor voltage drop in the current measurement technology are solved.

A display panel and a manufacturing method thereof, and a display device. The display panel includes an array substrate, an auxiliary electrode layer provided in the array substrate, a pixel defining layer provided on the array substrate, an undercut structure, a second electrode layer extending into the undercut structure, and an encapsulation layer covering the second electrode layer and the exposed surface of the undercut structure. The undercut structure includes a second groove and a shielding layer. The second groove penetrates the pixel defining layer and a portion of the array substrate to a surface of the auxiliary electrode layer. The shielding layer is provided on the pixel electrode layer and shields part of the notch of the second groove. The shielding layer and the second groove partially overlap in orthographic projection on the array substrate, and the width of the overlapping portion is one third to one half of the depth of the second groove.

The application discloses an encoder power supply switching circuit, which is characterized by comprising a first switching circuit, a second switching circuit and a power output end, wherein the power output end is used for connecting an encoder load, the first switching circuit is arranged between an encoder power supply and the power output end, the first switching circuit comprises a first diode, the positive electrode of the first diode is connected with the encoder power supply, and the negative electrode of the first diode is connected with the power output end; the second switching circuit is arranged between an encoder battery and the power output end, the second switching circuit comprises a first Pmos tube, the drain electrode of the first Pmos tube is connected with the encoder battery, the source electrode of the first Pmos tube is connected with the power output end, and the gate electrode of the first Pmos tube is connected with the encoder power supply. The application has the advantages that the automatic switching of the power supply of the encoder is realized, the problem of power supply voltage drop is solved, and the power supply switching circuit has a smaller voltage drop.

The invention discloses a cellulose and zirconium phosphate composite gel material for a dialysis system and a preparation method of the cellulose and zirconium phosphate composite gel material, and belongs to the technical field of biomedical materials.The method comprises the steps that an ionic liquid solution of cellulose is prepared, then a zirconium phosphate material is added and stirred, and a uniformly-dispersed mixed solution is obtained; under the action of a precipitant, the mixed solution forms hydrogel or organogel; the hydrogel, the aerogel formed after the hydrogel is dried or the aerogel formed after the organogel is dried is used as the cellulose and zirconium phosphate composite gel material to be used in a dialysis system. The cellulose zirconium phosphate composite gel material is controllable in size and good in biocompatibility, can be conveniently loaded in hemodialyzers with different sizes, is used for dialysate regeneration type hemodialysis, can release captured ions under the action of a high-concentration salt solution or an acid solution, and is good in reusability.

The present invention relates to an automatic switching circuit between an external power supply and battery power supply of a portable device, which comprises a first switch component, a second switch component, a third switch component, a charging management module and a power management module; one end of the first switch component is connected to the input end of the external power supply, and the other end is connected to the device load; one end of the second switch component and the third switch component are both connected to the power management module, and the power management module is connected to a rechargeable battery; the other end of the second switch component is connected to the device load, and the other end of the third switch component is connected to the charging management module, and the input end of the charging management module is connected to the external power supply. The present invention uses an ideal diode switch circuit designed with a PMOS tube to replace the power supply combining diode and the anti-reverse diode of the charging management circuit, which solves the voltage drop problem caused by the diode, improves the use efficiency of the rechargeable battery, and increases the service life of the battery.

The invention discloses a power supply circuit, which comprises a voltage stabilizing circuit for generating a regulating voltage according to a first power supply voltage; the first end of the first switching tube receives adjusting voltage; the first end of the second switching tube receives second power supply voltage, and the second end of the second switching tube is coupled to the second end of the first switching tube and outputs internal power supply voltage; when the first power supply voltage is smaller than the sum of the second power supply voltage and a first threshold value, the first switching tube is switched off, the second switching tube is switched on, when the first power supply voltage is larger than the sum of the second power supply voltage and a second threshold value, the first switching tube is switched on, the second switching tube is switched off, and the first threshold value is smaller than the second threshold value. The first threshold value and the second threshold value are introduced, and the first power supply voltage and the second power supply voltage are compared with the first threshold value or the second threshold value, so that the problem that the first power supply voltage generates voltage drop when passing through the voltage stabilizing circuit is solved, and the circuit is determined and controlled to maintain high voltage output; therefore, the normal work of a post-stage system under a relatively high voltage is ensured.

The invention provides an electromagnetic shielding protection circuit and device. The circuit comprises an input end, an output end, a grounding end, an anti-reverse connection circuit, a first protection circuit, a second protection circuit and a filter circuit. The anti-reverse-connection circuit is connected with the input end and the grounding end and is configured to receive the input power supply of the input end by using an MOS transistor in the circuit, and the circuit is disconnected when the input power supply is reversely connected; the first protection circuit is connected with the reverse connection prevention circuit and the grounding end and is configured to carry out voltage impact exceeding a first threshold value on the input power supply; the second protection circuit is connected with the first protection circuit and the grounding end and is configured to carry out current impact exceeding a second threshold value on the input power supply; and the filter circuit is connected with the second protection circuit, the grounding end and the output end, and is configured to filter differential-mode interference and common-mode interference of the input power supply, generate an output power supply and output the output power supply through the output end.