84results about How to "Achieve stabilization" patented technology

This invention relates to a laser interferometric control system and method that integrates multimodal collaborative photoelectric detection and intelligent control algorithms, belonging to the field of laser interferometry. It solves the problems of slow response speed, high complexity, and insufficient adaptability in existing laser interferometric control systems. The system includes: a light source module, whose optical path is connected to a static reference optical path module and an active adjustment optical path module. Both the static reference optical path module and the active adjustment optical path module are optically connected to an interference signal detection module, which outputs the interference contrast. A processing and decision-making module is configured to receive and fuse the interference contrast, first coordinate information, and second coordinate information, output adjustment action commands for the adjustment optical path adjustment components to adjust the interference contrast, and perform autonomous learning optimization based on the change in interference contrast before and after adjustment and the magnitude of the adjustment change, thereby achieving automatic adjustment and stable maintenance of the interference contrast. This invention is applied to laser interferometry.

The invention provides a dual-frequency single-port intermodulation tester, and the tester comprises an intermodulation control module which comprises an intermodulation controller, a first frequency source and a second frequency source, and the intermodulation controller controls the first frequency source and the second frequency source to generate two carrier signals with different frequencies through receiving a configuration instruction; and the multiplexer module comprises a plurality of power amplifier modules and a multiplexer, the plurality of power amplifier modules are used for amplifying the two paths of carrier signals, synthesizing the two paths of carrier signals through the multiplexer, outputting the synthesized two paths of carrier signals to a tested piece, and receiving and processing intermodulation products reflected back from the tested piece at the same time. According to the invention, the accuracy, the integration level and the field applicability of the intermodulation test are effectively improved.

The invention discloses a waste gas degradation treatment effect evaluation method and system, and relates to the technical field of waste gas treatment.The waste gas degradation treatment effect evaluation method comprises the steps that working condition parameters, pollutant concentration and reaction product spectral signals are synchronously collected in the operation process of a waste gas treatment device, and multi-source data are preprocessed to form a time sequence feature set; based on a time sequence feature set, carrying out feature modeling on the spectral signal, extracting main features of a product, comparing the main features with a standard fingerprint database, identifying an abnormal offset degree generated by a by-product, constructing a digital twin model by using working condition parameters, generating an ideal operation state, and calculating a deviation value between reality and ideal; the removal rate is calculated according to the pollutant concentration, the energy efficiency index is generated in combination with the energy consumption parameter, and the removal rate, the energy consumption index, the by-product deviation and the working condition deviation are integrated to form a multi-dimensional operation state vector. The controllability and response speed of the waste gas degradation treatment efficiency are effectively improved, and the intelligent adjusting capacity of the waste gas degradation process is remarkably enhanced.

The present invention provides a thermostatic piezoelectric oscillator capable of stabilizing the oscillation frequency. In the thermostatic piezoelectric oscillator (1), the core part (5) is sealed in a heat-insulating package (2) in a closed state. The core part (5) is supported in the package (2) by a core substrate (4). The core part (5) adopts a structure in which at least an oscillator IC (51), a crystal resonator (50), and a heater IC (52) are stacked in sequence.

The invention belongs to the crossing field of fine chemical engineering, crystal engineering and continuous production technologies, and particularly relates to a process and a device for continuously preparing 1, 3-cyclohexanedione crystals. The method comprises the following steps: respectively introducing a pre-cooled 1, 3-cyclohexanedione monosodium salt aqueous solution and an acidifying agent into a static mixer through a metering pump for mixing, introducing the materials into an aging tank for aging, and carrying out solid-liquid separation on the aged materials to obtain 1, 3-cyclohexanedione crystals. The invention provides a process and a device for continuously preparing a 1, 3-cyclohexanedione crystal, the process and the device are a brand-new continuous acidification crystallization process and system based on a static mixer, and aims to fundamentally eliminate local supersaturation, realize accurate control of the crystal form and morphology of 1, 3-cyclohexanedione and produce a high-quality flaky crystal form product. And the continuity, the stabilization and the high efficiency of the production process are realized.

The utility model provides a lifting device for coal mine well electromechanical installation. The lifting device comprises a lifting mechanism. The clamping stabilizing mechanism is fixedly mounted on the working surface of the top end of the lifting mechanism; the sliding protection mechanism is connected to the top opening of the clamping stabilizing mechanism in a sliding mode; the clamping stabilizing mechanism comprises a placing box, and the bottom of the placing box is fixedly connected with the lifting mechanism; the prevention plates are symmetrically arranged on the two sides of the inner cavity of the placement box; through the mechanical linkage design of the clamping stabilization mechanism and the sliding protection mechanism, dynamic stabilization and three-dimensional protection of the installation part are achieved, the sliding protection mechanism is rapidly opened and closed through a sliding rail, and broken stone is prevented from impacting the installation part.

The invention discloses a device and a method for generating nano-bubble fuel oil by utilizing oleophobic fibers and a Venturi flow field. The device comprises a Venturi tube, a nano-bubble generation reactor and a large bubble separator, the nano bubble generation reactor is filled with an oleophobic fiber module; the method comprises the steps that fuel oil flows through a Venturi tube to generate negative pressure to form liquid of pre-dissolved gas, the liquid enters a nano bubble generation reactor and flows through an oleophobic fiber module, micro-nano bubbles with large particle sizes are separated and discharged through an exhaust port in a large bubble separator, nano bubbles with small particle sizes stably exist in the liquid, and the micro-nano bubbles with small particle sizes stably exist in the liquid. The nanometer bubble fuel oil is obtained. The whole device system does not need high-energy-consumption equipment such as an external air pump and pressurized dissolved air, the structure is compact, the energy consumption is low, liquid of pre-dissolved air is formed only through negative pressure self-suction, and finally the liquid with the high concentration of D50lt is obtained; and therefore, the combustion efficiency can be remarkably improved, and pollutant emission can be reduced.

This application relates to the technical field of automated machining and provides a dedicated automated machining equipment and method for double-end face grinding and milling. The dedicated automated machining equipment for double-end face grinding and milling includes a base worktable device, a workpiece driving device, two sets of end face grinding devices, two sets of end face milling devices, a positioning device, a sensing and detection component, a PLC control system, and an operating system. This dedicated automated machining equipment for double-end face grinding and milling can coordinate the operation of each device through the PLC control system, realizing automated grinding and milling of the workpiece's double ends, thereby achieving the inventive objective of improving workpiece machining accuracy and expanding the equipment's adaptability. In addition, this application also provides a machining method applied to the aforementioned dedicated automated machining equipment for double-end face grinding and milling.

The utility model relates to electronic circuit technical field, concretely relates to an adjustable constant current source drive circuit, in the drive circuit, when the second input end of adjusting circuit receives voltage signal, current sampling circuit perceives the current of load and forms voltage difference at both ends, feedback circuit gathers voltage difference and forms feedback signal input to adjusting circuit, and adjusting circuit exports adjusting signal according to feedback signal and received voltage signal, and the process of adjusting signal and feedback signal, gathering voltage difference, repeatedly perceiving current is repeated until feedback signal and voltage signal are consistent, and load current reaches stable value. The adjustable constant current source drive circuit provided by the utility model embodiment, through the setting of current sampling circuit, feedback circuit, adjusting circuit and control circuit, not only realizes the closed loop control and accurate adjustment of load current, and through double -end sampling, avoids the problem of system power supply noise and unstable influence introduced by single -end sampling.

The utility model relates to the technical field of flue gas desulfurization, and discloses a desulfurizing agent spraying device for a dry desulfurization device, which comprises a material barrel, a cover is clamped and mounted on the material barrel, and a spraying component is arranged on the material barrel. According to the desulfurizing agent spraying device for the dry desulfurization device, in order to achieve fine spraying and stable supply of a desulfurizing agent, the spraying assembly is arranged and matched with the first motor to drive the spraying turbine to form powerful cyclone in the spraying pipe, and the desulfurizing agent in the material barrel is sucked into the spraying pipe through the opening; the spraying turbine and the spraying pipe are matched to form a venturi effect, negative pressure is generated at the inlet of the spraying pipe, the desulfurizing agent in the material barrel is continuously sucked, the continuity of the spraying process is ensured, a bottom motor drives a spiral plate to rotate, the desulfurizing agent is pushed upwards to the opening, and the desulfurizing agent is sprayed out from the outlet of the spraying pipe. And feeding interruption caused by gravity accumulation is avoided.

This invention belongs to the field of aluminum wire bonding production technology, specifically relating to an automated drawing system for aluminum wire bonding production. The system includes a wire feeding device, a wire threading and drawing device, an intelligent wire storage device, a wire expansion and drawing device, and a wire take-up device arranged sequentially. The wire threading and drawing device performs initial diameter reduction and surface smoothing of the aluminum wire, and its internal oil supply structure effectively reduces friction damage during drawing. The intelligent wire storage device enables slow storage and release of the aluminum wire and automatic tension adjustment, ensuring that the operation of upstream and downstream processes does not interfere with each other. The wire expansion and drawing device uses a frustum-shaped expansion and drawing cylinder to perform secondary precise drawing and fine-tuning of the aluminum wire. The expansion strength detection component on the cylinder automatically adjusts the detection counterweight and rotational impact angle to perform real-time strength testing of the aluminum wire after drawing. This invention is rationally designed and can complete product quality sampling inspection of bonded aluminum wire without interrupting upstream production, thus improving the production efficiency of bonded aluminum wire.

The application discloses a medicine production waste liquid separation and recovery system, and belongs to the technical field of medicine production waste liquid separation and recovery.The separation and recovery system comprises a conical sedimentation chamber, a pulse backflush membrane assembly, a modular membrane package, a mixing tank and a micro vacuum pump.The mixing tank is used for containing medicine waste liquid or enrichment liquid.The slurry in the mixing tank is discharged into the conical sedimentation chamber.The conical sedimentation chamber is used for separating the slurry into large-particle impurities and suspension.The suspension comprises medium-particle and small-particle.The pulse backflush membrane assembly is used for separating the suspension into enrichment liquid and solvent permeate.The modular membrane package is used for separating the solvent permeate into enrichment liquid and high-concentration solvent.The application reduces the membrane pollution rate of the pulse backflush membrane assembly, realizes liquid level stability and concentration dynamic balance, improves the solid content control precision of the enrichment liquid, improves the recovery purity of the medicine production waste liquid and reduces the system operation energy consumption.

The present application relates to mineral grinding equipment technical field, specifically provide a kind of safety optimization control method and control system of mill operation, comprising: acquisition mill in the process of operation Multi-source physical field signal and pre-processing is carried out to Multi-source physical field signal, obtain pre-processing signal, calculate the spatial motion state feature corresponding to time-frequency feature, establish the working condition identification model of mill to obtain the operating state of mill, generate dynamic safety constraint, real-time planning optimal operating point, control mill when meeting dynamic safety constraint, make the operating state of mill close to optimal operating point, mill operation produces Multi-source physical field signal is collected again, form closed-loop control.The present application is through multi-dimensional physical field perception technology, improves the transparency of mill internal operating state, uses dynamic constraint shrink mechanism, effectively avoids the occurrence of malignant mill blocking accident.

This invention relates to the field of medical supplies technology, specifically to an intelligent transfer cabinet for body fluid specimens. The cabinet comprises a cabinet body, a partitioned storage system, a control unit (i.e., an industrial-grade main controller), and a communication and control execution module. The cabinet body is integrally formed from 304 stainless steel and includes multiple physically isolated specimen storage areas and a low-temperature storage area. The main controller, based on an ARM Cortex-A series processor and equipped with an embedded system, serves as the core for managing all modules. The communication module enables data interaction with the hospital information system, and the control execution module, controlled by the main controller, centrally manages the electromagnetic locks and status indicators of each storage compartment door. This invention achieves standardized and intelligent temporary storage and transfer of body fluid specimens, improving management automation and reliability, and ensuring storage hygiene and safety as well as the integrity of information management.

This invention belongs to the field of multi-agent cooperative intelligent control technology, specifically relating to a multi-manipulator cooperative control method for unknown disturbances. The method includes: establishing a dynamic model of a strictly feedback nonlinear multi-manipulator cooperative system; constructing the system's communication topology through a virtual coupling mechanism; building a unified system cooperative error model; introducing a preset time function and a globally preset performance function to map errors to an adjustable constraint performance space, ensuring dynamic convergence of all error signals within the user-defined performance range; designing task-level shape control forces and pose control forces within a distributed gradient descent framework to construct an overall task-level control force, driving the multi-manipulators to move cooperatively and maintain a stable formation in the task space; and designing a joint-level distributed adaptive control law under unknown disturbances using the passive characteristics of the nonlinear system. This invention enables multi-manipulator systems to achieve cooperative convergence and stable control within a preset time under unknown disturbances.

The utility model discloses a kind of line integration devices for internet equipment, including fixed plate, the top end both sides edge of the fixed plate is evenly provided with multiple equidistantly arranged fixing pieces, the fixing piece is composed of two first fixed cylinder and second fixed cylinder oppositely arranged, and second fixed cylinder is located directly below first fixed cylinder, the first fixed cylinder and second fixed cylinder left and right sides are integrally formed with side plate. The utility model is fixed by unique fixing piece design, utilize internal fixing mechanism accurate to line clamping constraint, prevent shaking displacement, multiple fixing pieces can simultaneously integrate and fix multiple lines, cooperate external fixing mechanism operation convenient, realize line orderly management, and limit plate in internal fixing mechanism adopts arc rubber plate, can adapt to different shape thick and thin line, protect line from being damaged, by spring flexible adjustment, prolong line service life, reduce maintenance cost and equipment failure risk.

The utility model belongs to the field of feeding equipment, and particularly relates to a pre-needling machine feeding device for non-woven fabric production, which comprises a feeding shell, two rotating shafts are rotatably mounted on the inner wall of the front side and the inner wall of the rear side of the feeding shell, rotating rollers are fixedly mounted on the rotating shafts, and the two rotating rollers are sleeved with the same feeding belt in a transmission manner; lower rotating shafts are rotatably mounted on the inner walls of the front side and the rear side of the feeding shell, lower feeding rollers are fixedly mounted on the lower rotating shafts, upper rotating shafts are rotatably mounted on the inner walls of the front side and the rear side of the feeding shell, and upper feeding rollers are fixedly mounted on the upper rotating shafts; a plurality of U-shaped plates are installed at the top of the feeding shell at equal intervals, and U-shaped bases are installed in the U-shaped plates in a sliding mode. The non-woven fabric pre-pressing device is reasonable in design, the feeding assembly and the pre-pressing assembly are linked through the driving mechanism, stable conveying and pre-pressing of non-woven fabric are achieved, the pre-pressing pressure can be flexibly adjusted through the height adjusting mechanism, and the production quality and applicability are effectively improved.

The application provides a robot mechanical arm cooperative control method based on imitation learning. The method comprises the following steps: constructing a robot historical state data set, performing feature extraction on the robot historical state data set through an encoder structure to obtain a latent feature representation; obtaining a color image and a depth image of a target operated by a robot to be predicted through a binocular camera, performing feature extraction processing on the color image and the depth image through a mode classification module and a visual feature extraction network to obtain a mode feature and a visual feature vector; inputting joint state information, the latent representation, the operation mode feature and the fused visual feature into a decoder to obtain an action block prediction result, performing weighted averaging on action blocks at multiple continuous time points based on a time series integration weighting mechanism to obtain a continuous control trajectory of the robot mechanical arm. The application solves the multi-stage strategy discontinuity and error accumulation problems existing in the traditional control algorithm, and realizes smooth action, stable task and double-arm cooperative control.

The application provides an environment-friendly, degradable, antibacterial and tough polylactic acid-based elastic fiber and a preparation method thereof, and relates to the technical field of fiber materials, and comprises the following components in percentage by mass: 55-80wt% of polylactic acid, 13.7-17.5wt% of polyhydroxyalkanoate, 0.5-5wt% of a metal antibacterial agent, 5-20wt% of a thermoplastic polyurethane elastomer, and 0.8-2.5wt% of a star-shaped hyperbranched compatibilizer; the molecular structure of the star-shaped hyperbranched compatibilizer comprises a polylactic acid oligomer segment, a polyethylene glycol segment and a pyrocatechol group; the polylactic acid provides the degradability and basic strength of the matrix; the polyhydroxyalkanoate enhances the toughness, degradability and processability; the metal antibacterial agent endows the fiber with high-efficiency and broad-spectrum antibacterial function; the thermoplastic polyurethane elastomer contributes excellent elasticity and flexibility; and the star-shaped hyperbranched compatibilizer improves the compatibility of the fiber system; and the components synergize under the above-mentioned ratio to lay a multifunctional foundation of the fiber, including the antibacterial function, good elasticity and environment-friendly degradability.

The invention relates to an automobile motor shell deep drawing, trimming and stamping forming device which comprises an upper die and a lower die, the lower die is provided with a stamping base and a material supporting part used for supporting material belts, the feeding side and the discharging side of the material supporting part are each provided with a material belt stabilizing mechanism, and each material belt stabilizing mechanism comprises a clamping assembly and a driving assembly; the clamping assembly comprises at least one pair of oppositely-arranged clamping pieces, each clamping piece is provided with a fixed part and a movable part, and the movable parts can be controlled by the driving assembly to do opening and closing movement relative to the fixed parts so as to clamp or release the suspension sections of the material belts. The technical problem that the initial conditions for materials to flow into a female die are inconsistent due to the fact that a suspension section of a material belt vibrates up and down or drifts transversely in actual production of existing automobile motor shell stamping forming equipment is solved.

The utility model provides a game device of mesa angle adjustable, including mesa board, the outside of mesa board is provided with hinge, the bottom of mesa board is provided with electric telescopic link angle adjusting assembly, the mesa board is connected with the table body through the hinge, the inside bottom fixed mounting of table body has computer control box, the top of computer control box is provided with desktop angle sensor, the inside fixed mounting of table body has LED luminous control device, the outside of mesa board is provided with dynamic star disk subassembly. This game device of mesa angle adjustable, through setting dynamic star disk subassembly, can through adjusting desktop angle and star disk rotation state, obtains rich game experience, solved the problem that traditional device track is single, realizes the stepless regulation and stable control of desktop angle, simultaneously, star disk can move in any position on the desktop, and player can form dynamic interaction through operation and device, improves the participation and challenge of game, has reduced production and use cost.

The invention discloses an intraocular pressure measurement method based on a non-contact technology, and relates to the technical field of intraocular pressure detection.The intraocular pressure measurement method comprises the steps that speckle images are collected and enhanced, structured light is fused to obtain a three-dimensional point cloud, and a cornea initial geometric matrix is obtained through fitting; controlling an airflow nozzle to be automatically aligned according to the normal direction of the cornea based on the initial geometric matrix, carrying out frequency sweeping resonance excitation, collecting optical, speckle and acoustic three-channel responses, then carrying out time registration and feature consistency alignment, extracting cornea resonance feature vectors through short-time Fourier transform, and obtaining estimated intraocular pressure in combination with mechanical spectrum inversion. Stable intraocular pressure is obtained through nonlinear self-correction and residual feedback, and finally measurement data are calculated and output in combination with optical, acoustic and frequency spectrum modal consistency verification and confidence interval calculation. The controllable triggering of the cornea multi-order mechanical response under the low-energy excitation is realized through the automatic alignment of the airflow nozzle according to the normal direction of the cornea and the adoption of the sweep-frequency resonance excitation.

The invention relates to an aluminum and lithium co-extraction method of clay type lithium ore. The aluminum and lithium co-extraction method comprises the following steps: (1) pretreating the clay type lithium ore to obtain crushed ore; (2) the crushed ore is subjected to two-step countercurrent hydrothermal leaching, and aluminum-lithium-rich leaching liquid and leaching residues are obtained; and (3) carrying out adsorption lithium extraction on the aluminum-lithium-rich lixivium to obtain a lithium-rich solution and an adsorption raffinate, carrying out post-treatment on the lithium-rich solution to obtain a lithium salt product, and carrying out post-treatment on the adsorption raffinate to obtain a meta-aluminate product. The method realizes efficient separation and resource utilization of multiple components such as lithium, aluminum and the like, has high lithium salt purity and stable meta-aluminate product quality, and has the characteristics of short process, low energy consumption and suitability for industrial production.

This invention relates to a conveying device for conveying a motor vehicle body (2) along a conveying path (4) during painting in motor vehicle manufacturing. The conveying device includes a chain conveyor (5) having chain strands (6) circulating along the conveying path. Fixed receiving elements (7) and loose receiving elements (8) are arranged at predetermined distances from each other along the entire length of the chain strand and are movable along the conveying path by means of the chain strands. The fixed receiving elements constitute crossbeams detachably connected to the motor vehicle body, and the loose receiving elements have resting areas (12) on which another crossbeam (13) detachably connected to the motor vehicle body can be supported. The crossbeams maintain the same crossbeam distance across the vehicle model, corresponding to the distance between the fixed receiving element and the following loose receiving element. The invention also relates to a method and painting apparatus for painting a motor vehicle body.

The invention discloses a reactive additive with antioxidant and flame-retardant functions and a preparation method and application thereof, and relates to the technical field of antioxidant and flame-retardant additives, the reactive additive comprises a compound with a single molecular structure, and the compound comprises a phosphorus-nitrogen intumescent flame-retardant structural unit and a hindered phenol antioxidant functional structural unit which are directly connected through chemical bonds; wherein the phosphorus-nitrogen intumescent flame retardant structural unit is a phosphonitrilic chloride trimer derivative residue; according to the reactive additive with the antioxidant and flame-retardant functions as well as the preparation method and the application thereof, a phosphorus-nitrogen intumescent flame-retardant core (phosphonitrilic chloride trimer derivative residue) and a hindered phenol antioxidant unit (3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate residue) are covalently linked through a chemical bond; the reactive additive with a single molecular structure is constructed, so that the inherent defects of poor compatibility and easy migration and precipitation of an antioxidant and a flame retardant in a traditional physical compound system are solved from the molecular structure, and intramolecular synergy and long-acting stability of functional groups are realized.

The invention relates to the technical field of intelligent interception, and discloses a dangerous area personnel intrusion intelligent interception device which comprises an outer box and a stand column, the stand column is located on the left side of the outer box, a base is fixedly installed at the bottom of the outer box, and a moving assembly is arranged at the bottom of the base. Infrared cameras are fixedly installed on the left side and the right side of the outer box, an intercepting guardrail movably connected with the right side of the stand column is movably installed on the left side of the outer box, a box door is hinged to the right side of the inner wall of the outer box, and a warning screen is movably installed on the front side of the inner wall of the outer box; the front side of the outer box is fixedly provided with an identity verifier located above the warning screen, and the front side of the outer box is fixedly provided with a voice warning indicator located above the identity verifier. According to the intelligent interception device for personnel intrusion in the dangerous area, by arranging the stabilizing mechanism, the purpose of arranging the supporting structure is achieved, and by arranging the cleaning mechanism, the safety of personnel intrusion in the dangerous area is improved. The purpose that the camera is provided with a self-cleaning structure is achieved.

The application discloses a screw automatic feeding and discharging carrying robot, and relates to the technical field of intelligent industrial robots, which comprises a mechanical arm arranged on the side of an installation assembly line, a moving platform fixed to the upper side of the end arm part of the mechanical arm, a continuous feeding device movably arranged on the moving platform, a control connector rotatably arranged at the end of the arm part of the mechanical arm, a conveying pipe rotatably arranged at the top end of the control connector, a clamping and grabbing positioning device arranged at the lower part of the control connector and fixedly connected with the bottom of the conveying pipe, a control assembly fixedly arranged at the upper part of the control connector and located on the outer side of the conveying pipe, and a temporary storage conveying device rotatably arranged on the conveying pipe and abutting the control assembly on the outer side. The application realizes automatic adaptation and efficient and stable conveying of screws of different specifications, and achieves the technical effects of convenient change, stable feeding, reliable clamping and high tightening precision.

The invention relates to a dynamic object removed solid state laser radar and inertia coupled positioning and three-dimensional reconstruction method, and belongs to the field of three-dimensional scene positioning and mapping. According to the method, voxels serve as basic units, a local dynamic map composed of a plurality of recent frame observations is constructed, a hidden Markov model is adopted for modeling a voxel state updating process, probability updating is carried out on the occupancy state of the voxels through a state transition model and an observation model, and therefore modeling of the time sequence change characteristics of the voxels is achieved. Analyzing time sequence change characteristics of voxel observation in a sliding window, discriminating dynamic voxels and removing corresponding dynamic points, and performing tight coupling fusion with motion information provided by an inertial measurement unit only by using point clouds in static voxels as geometric constraints, so as to obtain motion information of the inertial measurement unit; therefore, high-precision positioning and stable mapping of the mobile carrier in a dynamic environment are realized.

The display driver and the display driver interface provided by the present disclosure comprise: the gate of the first switch tube and the gate of the third switch tube are connected with the first differential input end respectively, and the gate of the second switch tube and the gate of the fourth switch tube are connected with the second differential input end respectively. The source of the first switch tube is connected with the source of the second switch tube, the source of the third switch tube is connected with the source of the fourth switch tube, the drain of the first switch tube is connected with the drain of the third switch tube, and the drain of the second switch tube is connected with the drain of the fourth switch tube. The source of the fifth switch tube is connected with a voltage source, and the drain of the fifth switch tube is connected with the source of the first switch tube and the source of the second switch tube. The first resistor is connected in series with the first differential output end and the second differential output end. The input end of the feedback circuit is connected with the drain of the first switch tube, the third switch tube, the second switch tube and the fourth switch tube, and the output end of the feedback circuit is connected with the gate of the fifth switch tube. The common-mode voltage of the output signal can be flexibly adjusted.