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38 results about "Current generation" patented technology

Automatic switching of working modes control circuit

This disclosure provides a control circuit for automatically switching operating modes, including a current generation circuit, a first current difference circuit, a second current difference circuit, a valley control circuit, a PFM detection circuit, and an oscillator. The current generation circuit converts the control voltage into a first control current and generates a second control current of the same magnitude as the first control current through a first mirror. The first current difference circuit generates a fixed bias current. When the first control current is greater than the fixed bias current, the control circuit operates in a fixed-frequency PWM mode. The second current difference circuit generates a third control current of the same magnitude as the first control current through the first mirror. The valley control circuit adjusts the valley current when the lower transistor is turned on, and controls the frequency of the switching node to decrease by reducing the valley current. When the third control current is less than the fixed bias current, the overcurrent signal of the lower transistor is high, and the control circuit reduces the frequency by decreasing the valley current.
Owner:SILICON CONTENT TECH CO LTD

A method and system for globally invalidating an address translation cache based on a generation flag

ActiveCN122285554BCache invalidationParallel computing
The present application relates to address translation cache invalidation technology field, particularly to a kind of address translation cache global invalidation method and system based on generation mark.This application maintains current generation mark for each function mark, and records entry generation mark for each address mapping entry.When receiving global invalidation request, only flip the current generation mark of target function mark, without traversing any address mapping entry.Inquiry, compare entry generation mark with function mark current generation mark: if not equal, mark the entry as invalid and trigger re-request.Therefore, global invalidation is reduced from traversing N entries to flipping only one flag bit, time complexity is reduced from O (N) to O (1), eliminating performance jitter;Storage overhead is only a few KB, and hardware implementation is simple;Comparison operation can be parallel with query step, without increasing delay.
Owner:BEIJING YUNMAI XINLIAN TECH CO LTD

Organic electroluminescent elements and electronic devices

To provide an organic electroluminescent element that suppresses leakage current generation and has a long lifespan. [Solution] Organic electroluminescent element 1 having one or more light emission bands 5 and one or more charge generation transport bands, wherein one or more charge generation transport bands include a hole transport band 6, and the hole transport band 6 includes a first organic layer 61 containing a first compound and a second compound, and a second organic layer 62 containing a third compound, wherein the first compound and the second compound are different compounds, the first compound is a compound represented by formula (AC1), the third compound is a compound represented by formula (B1), and the third compound has one or more deuterium atoms. JPEG2026111349000375.jpg53170
Owner:IDEMITSU KOSAN CO LTD

A draft model inference optimization method and system for long context speculation decoding

This invention discloses a method and system for optimizing draft model inference for long-context speculative decoding, belonging to the field of electronic information technology. The method includes: dividing the historical context into multiple context units according to a predetermined strategy; evaluating the relevance of the context units to select the most relevant subset of contexts for the current generation step; adapting rotational position encoding to the tree-like draft tokens generated by the draft model, and simultaneously maintaining the position encoding state during sliding window pruning and rollback; jointly constraining attention reachability relationships, outputting results and scores, and generating a candidate token sequence; submitting the candidate token sequence to the target model for verification, and performing a consistent rollback of the generation state, context cache state, and position encoding state of the failed verification token sequences. This invention optimizes the inference process of the draft model by introducing a rollbackable sliding window mechanism and a relevance-based context retrieval mechanism.
Owner:XI AN JIAOTONG UNIV

Semiconductor equipment

To provide semiconductor devices that reduce manufacturing costs. [Solution] The semiconductor device includes a power device, a boost circuit, and an overcurrent detection circuit. The overcurrent detection circuit includes a sense circuit and a detection current generation circuit DCG that generates the detection current. The detection current generation circuit comprises a first current source I1_G that flows a first current I1 from a detection output node DC_OT, a first current circuit I1_CT that supplies a second current I2 greater than the first current I1 to the detection output node, a second current circuit I2_CT that supplies a third current I3 greater than the first current, a limiting circuit LM_CT connected between the second current circuit and the detection output node to limit the voltage at the detection output node, a first control circuit C1_CT that operates on the boost voltage from the boost circuit and controls the first current circuit according to the voltage output from the sense circuit, and a second control circuit C2_CT that operates on the power supply voltage and controls the second current circuit according to the voltage output from the sense circuit.
Owner:RENESAS ELECTRONICS CORP

Adaptive minimum duty cycle design for extending dc-dc converter operating voltage range

This application relates to an adaptive minimum duty cycle design for extending the operating voltage range of a DCDC converter. A method for a switched mode power supply (SMPS) includes providing an error voltage signal based on a difference between a sampled output voltage of the SMPS and a target voltage, and generating a clock signal characterized by an oscillation frequency. A switching control signal is generated based on the error voltage signal and the clock signal using pulse width modulation (PWM). The method further includes varying the oscillation frequency of the clock signal in a current generation circuit as a function of the error voltage signal, and applying the switching control signal to control a power switch of the SMPS.
Owner:DIODES INC

Organic electroluminescent elements and electronic devices

PendingJP2026111279AElectron holeHole injection layer
To provide an organic electroluminescent element that suppresses leakage current generation and has a long lifespan. [Solution] An organic electroluminescent element 101 having an anode 3, a cathode 4, one or more light-emitting bands 5, and one or more charge generation transport bands, wherein the light-emitting layer 51 contains a compound represented by formula (2) having at least one deuterium atom as a first host material, and at least one of the charge generation transport bands includes a first organic layer (e.g., a hole injection layer 61), and the first organic layer contains a compound represented by formula (AC1). TIFF2026111279000363.tif66170
Owner:IDEMITSU KOSAN CO LTD

Power series current source generation circuit and system for use in an analog-to-digital converter

ActiveCN114726369BHemt circuitsA d converter
The power series current source generation circuit applied to an analog-to-digital converter comprises a linear voltage-controlled current source and a power series current generation module; the linear voltage-controlled current source and the power series current generation module are electrically connected; the linear voltage-controlled current source is used for providing linear voltage-controlled current for the power series current generation module, and the power series current generation module is used for generating current proportional to the cube of a reference voltage. The power series current source generation circuit utilizes the exponential relationship between the collector current of an NPN type transistor and the base-emitter voltage; the power series current source generation circuit generates current proportional to the cube of the reference voltage; the current compensation circuit utilizes voltage bias to generate bias current, thereby solving the problem that the fixed voltage difference of the source follower changes with temperature.
Owner:XIAN AEROSPACE MINXIN TECH CO LTD

A method, system, and computer-readable storage medium for real-time generation of personalized content

PendingCN122311391AKnowledge servicesPersonalization
This invention discloses a method, system, and computer-readable storage medium for real-time personalized content generation, relating to the field of artificial intelligence content generation technology. It constructs and continuously updates a real-time state base for interactive objects, forming a controlled context snapshot of the current generation round based on this base. It jointly determines the target content's path location, single-generation granularity, whether an intervention action is triggered, the verification dimension after the current round's output, and the verification triggering conditions. The target content for the current round is then generated. After output, process feedback and task progress results are collected, and the verification results are combined to determine whether to continue generation, correct generation, downgrade output, switch paths, or switch interventions. The process feedback, task progress results, verification results, and corresponding adjustment results are written back to the real-time state base for use in subsequent rounds. This invention is applicable to learning, training, knowledge services, interest and skills guidance, task prompts, and other scenarios where content can be generated in real-time by artificial intelligence.
Owner:PEIYUAN EDUCATION TECHNOLOGY (SHANGHAI) CO LTD

Improved crayfish optimization algorithm-based three-expert collaborative scheduling method and system

The application discloses a three-teacher cooperative scheduling method and system based on an improved crayfish optimization algorithm, and comprises the following steps: constructing a multi-objective optimization objective function and performing scheduling feasibility constraint; acquiring basic data required for scheduling, initializing a population by using a double-layer coding mode of the improved crayfish optimization algorithm, and obtaining an initial generation population; decoding any individual in the current generation population, and converting the double-layer coding vector into a scheduling matrix; calculating a comprehensive target value of the decoded scheduling matrix by using the multi-objective optimization objective function, and obtaining a corresponding fitness value in combination with a robust correction term; updating and determining an optimal individual of the current generation according to the fitness sequence; performing position updating on any individual in the current generation population based on the improved crayfish optimization algorithm, and generating a next generation population; judging whether a preset termination condition is reached; if the termination condition is met, outputting a scheduling matrix corresponding to the optimal individual of the current generation, otherwise, continuing iteration.
Owner:SICHUAN QIMINGDAREN TECH CO LTD

A multi-room consistency layout generation method and system based on generative process constraint modulation

PendingCN122263231AReduce iterative adjustmentsImprove production efficiencyGeometric CADDesign optimisation/simulationGeneration processGenerative process
The application relates to the technical field of space automatic layout generation and generation process control, and discloses a multi-room consistency layout generation method and system based on generation process constraint modulation. The method comprises the following steps: acquiring space structure information of a target residential space; constructing a multi-room generation state model; constructing and updating a multi-room consistency constraint set in a layout gradual generation process; performing consistency constraint modulation processing on a candidate layout action in a current generation step, so that each room shares a consistency control condition in the generation stage; and outputting a multi-room overall layout scheme satisfying the multi-room consistency constraint set. Compared with the prior art in which each room is independently generated and then subjected to rule checking or scoring screening to realize consistency, the application cooperatively controls consistency relationships such as layout density, furniture scale and space blank proportion in the generation stage, so that the structural rationality, stability and generation efficiency of the multi-room overall layout result are improved.
Owner:SHENZHEN YISHUJIA INFORMATION TECHNOLOGY CO LTD

Single-specification one-dimensional blanking method and device based on improved genetic algorithm

This invention relates to the field of computer application technology, solving the technical problem of low profile optimization rate and multiple nesting methods leading to inconvenience in factory processing. Specifically, it relates to a single-specification one-dimensional blanking method and apparatus based on an improved genetic algorithm, comprising: generating an initial population according to gene encoding methods, and using depth-first search to optimize the initial population to obtain an incomplete population; using a heuristic algorithm to repair the genes of individuals in the incomplete population, calculating the fitness of each repaired individual according to a fitness function, and selecting the individual with the highest fitness value as the dominant population; using a heuristic algorithm to diversify the dominant population, and extracting the individual with the highest fitness value as the current generation population; finally, the optimal population obtained through crossover and mutation is considered as the one-dimensional blanking scheme. This invention, by integrating depth-first search into a genetic algorithm, significantly reduces the number of nesting schemes without reducing utilization, making it more suitable for factory processing needs.
Owner:ANHUI UNIV

Temperature coefficient adjustable current generating circuit, circuit board and current generating chip

The application relates to the technical field of current generation, and discloses a temperature coefficient adjustable current generation circuit, a circuit board and a current generation chip. The current generation circuit comprises a bias voltage generation unit, a first load unit, a first current mirror unit, a second load unit, a third load unit, an operational amplifier unit and a second current mirror unit. In use, the first bias current is generated on the first load unit, the first bias current is transferred to the second load unit through the first current mirror unit, the voltage is formed on the second load unit, the operational amplifier unit forms the second bias current on the third load unit, the current flowing through the output tube can be obtained by subtracting the current of the third branch from the current of the second branch, and then the temperature coefficient of the current flowing through the output tube can be adjusted by adjusting the temperature coefficient of the first load unit-third load unit.
Owner:JIANGSU JITRI INTELLIGENT INTEGRATED CIRCUIT DESIGN TECH CO LTD

A novel bandgap reference start-up circuit with degenerate state detection

PendingCN122172924AElectric variable regulationMOSFETSchmitt trigger
A novel bandgap reference startup circuit with degeneracy state detection is disclosed, particularly relating to the design of integrated circuit power control chips. The circuit includes a novel bandgap reference startup circuit and a bias voltage and enable signal generation circuit. The novel bandgap reference startup circuit comprises a startup circuit and an inverter, a degeneracy-removal current generation circuit, a bandgap core and process corner adaptive compensation circuit, and a Schmitt trigger circuit. This invention utilizes the on / off characteristics of MOSFETs to achieve startup. By detecting the difference in degeneracy state between the core devices of the second-order compensated bandgap circuit (such as BJTs and MOSFETs) at the degeneracy point and in normal operating conditions, it can accurately identify and effectively remove the bandgap reference circuit from the degeneracy state. Simultaneously, it adapts to the spurious operating point detection requirements of first-order bandgap circuits, accurately identifying the operating state of the reference circuit and effectively solving problems such as unreliable startup, high power consumption, inaccurate judgment, and poor adaptability in existing circuits.
Owner:LIAONING UNIVERSITY

Efficiency and privacy-oriented model-end cloud collaborative inference method and system

ActiveCN121919915Bavoid transmissionSupports full scene adaptationDigital data protectionBiological modelsAlgorithmTheoretical computer science
The application relates to an efficient and privacy-considered large model end-cloud collaborative inference method and system, which comprises the following steps: obtaining input and configuring KV cache control parameters through an end side; performing embedding calculation to generate a feature tensor and uploading the feature tensor to a cloud side; performing decoding layer inference on the cloud side according to authorization to call the KV cache and returning a hidden state; in a current generation step, performing speculative decoding prediction on subsequent tokens based on the hidden state on the end side, and calculating an end-side local inference result corresponding to a low-dimensional feature according to a dimension splitting rule; calculating a cloud-side local inference result corresponding to a high-dimensional feature on the cloud side, and returning the cloud-side local inference result after language self-adaptive cutting and encryption; fusing the two-end local inference results to obtain a complete distribution, sampling to generate an incremental token, uploading the incremental token to the cloud side for verification, and updating the KV cache.
Owner:HUNAN KUNLUNYUAN ARTIFICIAL INTELLIGENCE APPLICATION SOFTWARE CO LTD

A medical question and answer generation method and system fusing retrieval enhancement generation and security fuse mechanism

This invention discloses a medical question-answering generation method and system that integrates retrieval-enhanced generation and a security circuit breaker mechanism. The method includes: semantic vectorization and intent recognition of user-inputted medical consultation requests; if the request falls within the scope of medical consultation, triggering retrieval-enhanced generation; generating an answer based on the retrieval results using a large language model, and performing consistency checks between the retrieval content and the generated intent, inference-side checks based on medical logic operators, and security audits and risk measurements on the output side during the generation process; outputting the answer when all stages of verification pass, and executing an instruction-level security circuit breaker mechanism when an anomaly is detected, interrupting the current generation sequence and outputting a safety fallback statement. This invention, through the synergy of three-stage security verification and instruction-level circuit breaker, achieves real-time monitoring of generated content and physical blocking of high-risk information, significantly reducing the illusion rate of medical question-answering and improving the system's security and reliability.
Owner:SHANGHAI ZHONGKE XINTU DIGITAL TECHNOLOGY CO LTD

A domestic intelligent charging controller

The application discloses a kind of domestic intelligent charging controller in the field of electrical engineering, including the current generation circuit, voltage current acquisition circuit and battery charging circuit connected in turn along the direction of current;Current generation circuit includes photovoltaic electric board, and the junction of photovoltaic electric board and voltage current acquisition circuit is wrapped with protection component, and the protection component includes rubber shell, and there is sealed cavity between rubber shell and voltage current acquisition circuit, and the sealed cavity is communicated with the storage tank loaded with cooling liquid, and the storage tank is located on the radial side of rubber shell, and the inside of sealed cavity is provided with stretched shape memory plastic, and the other end of shape memory plastic is fixedly connected with tension spring in compressed state, relative to the prior art using clean energy, in the technical scheme, it is considered that photovoltaic panel receives thermal energy, which will have a high temperature effect on the circuit, resulting in increased cable resistance and reduced current flow, so the cable is cooled.
Owner:CHENGDU UNIV

Interleaved pfc circuit branch equalization control method, device and circuit and air conditioner

ActiveCN115360895BControl signalHemt circuits
The application discloses a kind of staggered PFC circuit branch equalization control method, device and circuit and air conditioner, belong to PFC circuit control field;After obtaining the branch current and dry way current of PFC circuit, according to each branch current and dry way current generation each branch IGBT control signal, then according to control signal control each branch IGBT's on-off, to make each branch current same;The target of each branch current is set to same value and is adjusted, so when generating IGBT control signal, it can guarantee that each branch IGBT current is same.Due to the scheme of the application directly according to each branch current is adjusted, so even if the component electrical parameter deviation of each branch is larger, the current obtained by final adjustment is also same, and the branch current deviation of large current does not cause the safe value that IGBT bears to be exceeded and then damage IGBT, while ensuring the normal work of PFC circuit, each branch IGBT can be protected, and the service life of IGBT is prolonged.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI

Driving circuit for low-dropout regulator, and chip

Disclosed in the present application are a driving circuit for a low-dropout regulator, and a chip. The driving circuit comprises: a reference voltage generation module, a bias current generation module and a selection module, wherein the selection module is connected to both the reference voltage generation module and the bias current generation module, and receives a control signal, the selection module outputs a target bias current and a first reference voltage to a low-dropout regulator during a first time period on the basis of the control signal, such that the low-dropout regulator switches from a first power consumption mode to a second power consumption mode, and the selection module outputs a second reference voltage to the low-dropout regulator after the first time period, so as to maintain the second power consumption mode, the power consumption of the first power consumption mode being less than the power consumption of the second power consumption mode, the target bias current gradually increasing to a preset value over time, and the second reference voltage being established by the reference voltage generation module within the first time period. In this way, the wake-up speed of a low-dropout regulator is increased, and the wake-up time of the low-dropout regulator is reduced.
Owner:NAVINFO

Power control circuit and input / output circuitry

This application discloses a power control circuit and an input / output circuit system. The power control circuit generates intermediate voltages with different voltage values ​​through the coordinated operation of a bias current generation module and a voltage divider generation module. The power supply terminal of the first-level logic unit of the multi-level logic conversion module is coupled to the intermediate voltage terminal corresponding to the minimum intermediate voltage. This ensures that the voltage difference between the intermediate voltage terminal and the first voltage domain is less than the threshold voltage of the input MOS transistor in the first-level logic unit. This avoids the possibility of a large static leakage current after the first power domain is powered on, enabling the circuit to maintain a low static power consumption state and solving the problems of uncertain output signals and excessive static power consumption in related technologies.
Owner:GUANGZHOU ZENGXIN TECH CO LTD

Conduction behavior-aware current generation method and device for multi-branch parallel inverter system

PendingCN122339208APower qualityControl theory
This application discloses a method and apparatus for generating current based on conduction behavior sensing in a multi-branch parallel inverter system, relating to the field of power electronics and power conversion technology. The method includes: synthesizing acquired output current information within a predetermined time window and calculating a normalized change; when the normalized change meets a preset conduction criterion, determining that the load has transitioned from a non-conducting state to a conducting state; after determining that the load has entered the conducting state, adjusting the generation process of the active current reference output by the voltage regulation stage; and after the conduction phase ends, releasing the constraints and restoring the conventional generation method. This application also provides a method for the coordinated operation of parallel branches in a multi-branch parallel inverter system, which disperses current ripple by enabling each parallel inverter branch to complete the modulation output with staggered modulation execution timing. This application can effectively suppress transient current excitation, reduce output current ripple, and improve system power quality and operating efficiency.
Owner:WENZHOU UNIV +1

Temperature coefficient current generating circuit, chip and electronic device

PendingCN122284757AEliminate the influence of current temperature characteristicsImprove activity stabilityCapacitanceControl signal
This application discloses a temperature coefficient current generation circuit, chip, and electronic device. The circuit includes: a voltage generation module providing first and second reference voltages, the difference between which has a positive temperature coefficient; a clock signal generation module generating at least one set of clock control signals containing non-overlapping relationships; a switched capacitor module responding to the clock signal, coupling the second reference voltage to an internal capacitor for charging in a first operating phase, and coupling the first reference voltage to the internal capacitor and discharging it to output voltage in a second operating phase; an error amplification module generating an error control signal based on the output voltage; and a current output module providing an output current based on the error control signal. This application replaces resistors with a switched capacitor network, making the output current independent of resistance, eliminating the influence of resistor temperature drift, and allowing for flexible adjustment via clock frequency or capacitor value, thus improving current accuracy and design freedom.
Owner:CHENGDU CHIPSEA INNOVATION TECH CO LTD +1

A multi-working-condition simulation ablation test platform and method for switch contacts

This invention belongs to the field of power equipment fault diagnosis technology, specifically relating to a multi-condition simulated ablation test platform and method for switch contacts. The test platform includes a multi-load switching unit, a gradient current generation module, a synchronous acquisition module, an environmental control module, and a central control unit. The central control unit incorporates a wide-range environment adaptation algorithm, compensating for environmental errors through temperature and humidity correction formulas, and introducing weighting factors to correct arc energy for different load types, thus improving the simulation accuracy of contact ablation under wide-range environmental stress and load changes. The synchronous acquisition module, combined with the environmental control module, achieves simultaneous acquisition of four-dimensional characteristic data: dynamic resistance, ablation morphology, arc energy, and environmental parameters. This transforms the ablation process from qualitative observation to quantitative measurement, providing solid microscopic data support for in-depth exploration of the ablation mechanism and the establishment of accurate physical models.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD RESEARCH INSTITUTE +1

Solar cell structures for improved current generation and collection

In one aspect, optoelectronic devices are described herein. In some implementations, an optoelectronic device comprises a photovoltaic cell. The photovoltaic cell comprises a space-charge region, a quasi-neutral region, and a low bandgap absorber region (LBAR) layer or an improved transport (IT) layer at least partially positioned in the quasi-neutral region of the cell.
Owner:THE BOEING CO

A video generation method and related apparatus

The application discloses a video generation method and related device, by dividing the video generation process into N generation stages after obtaining the video description text used for describing the target video, the target video is generated. By displaying the generated content and providing the to-be-evaluated question when the interactive condition of the i-th generation stage is reached, the user can interact with the video generation process, by displaying the generated content of the i-th generation stage, the user can more timely find the deviation between the generated content and the demand, and adjust or confirm through the feedback information, so that the video generation process has stronger controllability. In response to the feedback information being the acceptance of the generated content, the video generation is continued based on the generated content, and in response to the feedback information being the content adjustment instruction, the video generation of the i-th generation stage is re-performed based on the content adjustment instruction. Since only the current generation stage needs to be re-performed for video generation, the complete video is avoided from being regenerated, and the computational overhead is reduced.
Owner:TENCENT TECH (BEIJING) CO LTD

A method for handling a phase-to-phase short circuit in a three-phase power system

The application discloses a kind of processing methods of three-phase power system phase short circuit, there are several switches on three-phase power system, switch can detect current signal and voltage signal, when phase short circuit fault occurs and thereby generates short circuit current, from short circuit current generation time, when certain the switch detects short circuit current continues to preset tripping duration, it is tripped, the switch that does not detect the short circuit current detects voltage signal, certain the switch does not detect the voltage signal again after the planned opening time of the first switch upstream of the switch, it is tripped.The method can cut off the switch closest to the phase short circuit fault point on both sides to remove short circuit fault and make the system self-healing, and it is convenient to operate, and practical.
Owner:BAODING YUXIN ELECTRICAL TECH

An inductively coupled impulse current generation device and method

The application relates to an inductive coupling-based impulse current generating device and method, which generates impulse current through electromagnetic induction principle and comprises a primary drive module for energy input, a magnetic coupling core module for magnetic energy conversion, a secondary induction module for current output and a waveform regulation module for waveform regulation. The secondary current waveform is collected in real time, the wavefront time, the half-peak time and the secondary impulse current peak value are calculated based on an optimization formula and compared with set values, if the waveform parameters or the current peak value deviate more than the set threshold value, the waveform regulation module and the correction coefficient are adjusted. Compared with the prior art, the application can realize impulse current output and high-frequency lightning current transient characteristic simulation, and provide high-precision and high-efficiency test technical support for lightning protection performance verification of power equipment.
Owner:STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER CO

Temperature detection circuit, method, chip and electronic device

This application provides a temperature detection circuit, method, chip, and electronic device. The temperature detection circuit includes a current generation module, a temperature detection module, and a control module. The current generation module generates a first current and a second current. The temperature detection module generates a first voltage difference and a second voltage difference based on the first current and the second current. The first voltage difference and the second voltage difference have positive temperature coefficients. The control module converts the first voltage difference and the second voltage difference into a first temperature and a second temperature, respectively, and calculates the temperature difference between the first temperature and the second temperature. When the temperature difference is less than or equal to a preset temperature value, the first temperature or the second temperature is selected as the temperature detection result. The temperature detection result can be obtained when the current generation module is fault-free, thereby improving the reliability of the temperature detection result.
Owner:CHIPSEA TECH SHENZHEN CO LTD

Reference current source circuit with second order temperature compensation based on triode beta parameter

The present application belongs to the technical field of digital-to-analog converter, and particularly relates to a reference current source circuit based on triode beta parameter for second-order temperature compensation, aiming to solve the problem of low temperature coefficient of current of existing bandgap reference circuit, leading to increased power consumption and area of the circuit. The present application comprises: a positive temperature coefficient current generation circuit for generating a positive temperature coefficient current Ip and a first bias voltage U1; a negative temperature coefficient current generation circuit for generating a negative temperature coefficient current In and a second bias voltage U2 based on the first bias voltage U1 through second-order temperature compensation of beta parameter; and a first-order temperature compensation synthesis circuit for generating a stable current I based on the positive temperature coefficient current Ip, the negative temperature coefficient current In and the second bias voltage U2. The present application improves the stability of the reference current, thereby improving the conversion accuracy of the digital-to-analog converter, and is more suitable for high-precision application scenarios; meanwhile, the influence of process parameter fluctuation in the chip manufacturing process is eliminated.
Owner:BEIJING MICROELECTRONICS TECH INST +1

A load and dimming compensation circuit for LED driving chip

PendingCN122458258AHemt circuitsLoad regulation
The application relates to the technical field of LED driving and discloses a load and dimming compensation circuit for an LED driving chip, which comprises a sampling and feedback reference establishment module, a bias current generation module, a dimming range expansion module, a bias voltage synthesis injection module, a dynamic compensation implementation module and a dimming continuous expansion module. By generating a first bias current associated with an output voltage and a constant second bias current, a total bias voltage is formed on a bias resistor and injected into a current sampling path, so that an equivalent sampling voltage contains a load adjustment compensation component and a dimming range expansion component. The application can keep the output current stable under different output voltages, expand the dimming range to below the closing threshold of a traditional scheme, realize continuous and smooth dimming from maximum brightness to near zero brightness, and eliminate current mutation and flickering.
Owner:CHIPLIGHT TECH SHENZHEN CO LTD