58 results about "Positive feedback" patented technology

The application provides a common-source common-gate amplifier, comprising a signal input module, which is used for generating an input signal according to a power supply voltage; a cross-coupling module, which is electrically connected with the signal input module and is used for forming internal positive feedback according to an output signal; a first biasing module, which is electrically connected with the cross-coupling module; a first branch module, which is electrically connected with the first biasing module; a second biasing module, which is electrically connected with the cross-coupling module; a second branch module, which is electrically connected with the second biasing module; wherein the first biasing module and the second biasing module are used for providing biasing after an input common-mode feedback voltage, the first branch module and the second branch module are used for providing large-swing output biasing, and the first branch module and the second branch module are respectively electrically connected with the signal input module, and the signal input module is further used for outputting branch signals to the first branch module and the second branch module. The application improves the voltage swing, the gain and the bandwidth of the circuit under the single-stage amplifier structure.

The present disclosure provides a differential hysteresis comparison circuit and method, which comprises: a differential input circuit for inputting a first differential signal and a second differential signal; a positive feedback hysteresis circuit connected with the differential input circuit, for comparing the first differential signal and the second differential signal to obtain a differential comparison result, outputting a first comparison result signal when the differential comparison result is greater than a first threshold voltage, outputting a second comparison signal when the differential comparison result is less than a second threshold voltage, the first threshold voltage being greater than the second threshold voltage; and an output stage circuit connected with the positive feedback hysteresis circuit, for converting the first comparison result signal or the second comparison result signal into a single-ended signal output.

This invention belongs to the field of solid oxide fuel cell control and optimization technology, and particularly to a dual-input model predictive control method for solid oxide fuel cells with carbon deposition constraints. It includes the following steps: S1: Constructing a DIR-SOFC controlled object model with 11 state variables; S2: Solving for the optimal control increment through sequential quadratic programming; S3: Constructing a constraint system; S4: Introducing an adaptive setpoint for the output voltage that adjusts linearly with the load current density. The model dimension of this invention is expanded from the existing 3 states to 11 states, fully covering six gas phase partial pressures, bilinear coupling of carbon accumulation and catalyst activity, and three-zone thermal dynamics. The ODE white-box prediction engine accurately reflects MSR nonlinearity and positive feedback of carbon deposition. Compared with ARMAX black-box prediction, the error is reduced from approximately 3% to less than 0.8%, with an average single-step calculation time of 133ms, meeting the real-time constraint of a 1s sampling time.

This invention relates to the field of permanent magnet synchronous motor (PMSM) design technology, and discloses a method and device for integrated collaborative optimization design of the rotor magnetic circuit of a PMSM. The method includes: collecting time-series data of multi-source vibration and electromagnetic load under heavy-load conditions of forklift operation, and constructing a dynamic excitation phase space mesh for the rotor interface; performing multi-field coupled response simulation based on the mesh to drive a parameterized rotor model, generating a structural eddy current coupled simplex complex; constructing a combined constraint and sub-mode gain model for robust magnetic circuit optimization based on the complex, generating a geometrically reinforced candidate solution set; performing multi-objective collaborative convergence and three-dimensional model generation under the constraints of the candidate solution set, and outputting an anti-disturbance optimized rotor structure. This invention solves the problem that existing technologies cannot cope with dynamic multi-field positive feedback under complex forklift operating conditions, leading to decreased efficiency and low reliability of the motor during continuous operation, thus enabling the motor to adapt to forklift operation requirements.

This invention belongs to the field of analog integrated circuit design, and particularly relates to a low-dropout linear regulator with fast dynamic response and high stability. It includes: an error amplifier, a Class AB buffer stage circuit, an output power transistor, a positive feedback resistor compensation circuit, an undervoltage detection circuit, and a startup circuit. The Class AB buffer stage circuit is used to improve the transient characteristics of the low-dropout linear regulator, and the positive feedback resistor compensation circuit is used to improve the phase margin of the low-dropout linear regulator. This invention achieves fast dynamic response, essentially eliminates overshoot and undershoot phenomena, and significantly shortens the recovery time. It also maintains high stability while ensuring loop gain and includes undervoltage detection functionality to ensure smooth system startup.

The application discloses a kind of balanced cutting adaptive control method, system and numerical control lathe, belong to numerical control machine tool technical field, solve double-spindle double-tool turret numerical control lathe in double-tool turret balanced cutting finishing stage, because of cutting fluid impact, servo response difference and temperature gradient cause cutting force-thermal deformation coupling vibration, lead to surface finish deteriorate, while conventional detection cannot be identified, finally cause precision parts batch scrapping problem.It includes the following steps: initialization and reference calibration step, determine the fixed parameters required for algorithm operation and store in numerical control system parameter table.The application is by collecting double-tool turret servo current and decoupling into high-frequency component and low-frequency component, using high-frequency component to adjust feed rate, using low-frequency component to offset radial position, to cut off the positive feedback coupling chain between cutting force fluctuation, chip shape change, cooling liquid jet deflection, temperature field distribution change and cutting depth fluctuation, suppress non-periodic dynamic vibration response, avoid machining surface finish deterioration.

This invention discloses a dynamic comparator for a successive approximation analog-to-digital converter (ADC), relating to the field of comparator technology. The dynamic comparator includes: a cascaded pre-amplifier circuit and a latch circuit; the pre-amplifier circuit includes at least a differential input pair of transistors, a positive feedback loop, and a first tail current source; the differential input pair is used to receive external differential input signals; the positive feedback loop and the first tail current source are both connected to the differential input pair; the first tail current source includes three NMOS transistors connected in parallel; the three NMOS transistors connected in parallel are used to dynamically bias the differential input pair; the positive feedback loop is connected between the two signal output nodes of the pre-amplifier circuit; the positive feedback loop is used to increase the gain of the pre-amplifier circuit. This invention addresses the problems of large footprint and difficult offset calibration in existing successive approximation ADCs.

The application relates to the field of integrated circuit design, in particular to a double-tail dynamic comparator based on a feedback structure, which comprises a preamplifier, a latch and a positive feedback structure which are cascaded with each other; the preamplifier comprises input ends VIP and VIN, output ends fn and fp, and is used for amplifying comparison signals of the input ends; the latch is used for carrying out digital judgment on the amplified comparison signals and latching a judgment logic level; and the positive feedback structure is used for providing a discharge path for fn and fp and increasing a differential voltage between fn and fp. The application introduces the design of the positive feedback structure, adds a new discharge path to the output node of the amplifier to accelerate the pre-amplification speed, and increases the differential voltage between the output nodes fn and fp, so as to reduce the regeneration time of the latch, inhibit the influence of non-ideal factors on the comparator when the input differential signal is small, and accelerate the comparison speed.

This invention provides a comparator circuit with latching function and its control method. The comparator circuit with latching function uses an initial voltage provided by a pre-comparison module. The initial voltage is dynamically adjusted based on the input comparison voltage to generate a first current variable. This first current variable is converted into a control voltage, and a first comparison result is output based on the control voltage. The first comparison result is compared and positive feedback latched by the latching module to obtain a second comparison result. This comparator circuit with latching function, designed for low-to-medium precision and low-frequency applications, replaces the redundant design and related bias circuits of multi-stage operational amplifier cascades with a pre-comparison module. The common-mode voltage bias is integrated into the structure of the pre-comparison module, simplifying the circuit structure. This comparator circuit does not interfere with the preceding or following circuits, reducing process sensitivity.

A control device actuates an active haptic operating element for a motor vehicle. The control device is designed to determine whether there is an activation of the operating element; to determine whether the operating element is assigned an available function if an activation of the operating element has been determined; and to actuate the operating element to emit an active haptic positive feedback when an activation of the operating element has been determined, and it has been determined that the operating element is assigned an executable function. The control device is designed to actuate the operating element to emit an active haptic negative feedback when an activation of the operating element has been determined, and it has been determined that no executable function is assigned to the operating element. The active haptic positive feedback and the active haptic negative feedback differ from one another.

This invention discloses an adjustable frequency microwave oscillator, comprising a feedback resonant network, an active transistor amplifier, and a phase adjustment network. The feedback resonant network includes a resonator. The active transistor amplifier is connected to the feedback resonant network through an input matching network and an output matching network. The phase adjustment network is equivalent to a variable capacitor. The signal passes through the input matching network, the active transistor amplifier, the output matching network, and the feedback resonant network to form a positive feedback oscillation. The phase of the loop is adjusted by regulating the equivalent variable capacitor of the phase adjustment network. The oscillation frequency is adjusted by the phase adjustment network, and the oscillation conditions of the oscillator are improved by a high-Q frequency selection network, enabling precise control of the frequency and power of the microwave oscillator.

This invention discloses a sequence recommendation method based on the fusion of positive and negative feedback and logical rules, comprising: dividing user behavior into positive and negative feedback; constructing a feedback sequence, including positive and negative feedback sequences, based on user behavior and time sequence; processing the features of the user behavior sequence and the feedback sequence to obtain corresponding embedded features; using the self-attention mechanism of a deep learning model to process the input embedded features, capturing the internal dependency features of the original user behavior sequence; and using a cross-attention mechanism to cross-associate the feedback sequence and the input user behavior sequence to capture the dynamic relationship between user behavior and feedback; and through an output layer, mapping the model's intermediate features to user preference ratings for target items, outputting a rating list for recommendation ranking. This invention significantly improves the performance, interpretability, and adaptability of recommendation systems by combining positive and negative feedback information from user behavior with logical rules.

This invention provides a negative resistance oscillator and inductor sensor system with multi-parameter programmable characteristics, relating to the field of electronics and electrical engineering. It includes an amplification unit, a resonant circuit, and a feedback network. The resonant circuit is connected between the non-inverting input terminal and a reference potential. The feedback network consists of first, second, and positive feedback units connected between the inverting input terminal, the output terminal, and the non-inverting input terminal. The equivalent parameter values ​​of the feedback units are configured through programming to collaboratively determine the equivalent negative resistance, matching it with the equivalent loss of the resonant circuit. The beneficial effects are that programmable parameter configuration achieves precise matching of the equivalent negative resistance with resonant circuits of different specifications, solving the problems of poor adaptability and rigid settings in traditional oscillators. Furthermore, active compensation for temperature characteristics is achieved through multi-parameter collaborative adjustment, significantly improving the system's versatility, flexibility, and stability under different hardware environments and temperature scenarios.

The present disclosure relates to a memory device based on a bulk silicon substrate and to a technology for implementing stable memory operation without a capacitor. Specifically, the present disclosure relates to a technology for improving operational reliability of a memory device by preventing electrical interference and blocking leakage current by utilizing a positive feedback mechanism and a triple-well layer. The present disclosure relates to a technology for amplifying accumulation of electrons and holes through a positive feedback mechanism during memory operation, thereby improving switching speed and electrical reliability of the device. In addition, the present disclosure provides a memory device capable of operating stably even at low voltages by preventing electrical interference through the triple-well layer and blocking unnecessary current leakage.

This invention relates to the field of power equipment condition monitoring technology, and discloses an online monitoring and evaluation device and method for series compensation capacitors. The method includes: acquiring operating signals and extracting steady-state operating characteristics and transient characteristic parameters; combining historical cumulative fatigue damage, calculating the dynamic frequency-varying equivalent series resistance modulated by the damage positive feedback effect, and substituting it into the thermal differential equation to iteratively calculate the dynamic hot spot temperature sequence; for transient events, constructing a cross-coupling term characterizing the synergistic effect of electrodynamics and thermomechanical softening, and calculating the high-frequency equivalent partial discharge; performing thermomechanical softening correction on the transient overvoltage peak to obtain the thermomechanical equivalent transient stress, and dynamically updating the electro-thermal-mechanical coupled cumulative fatigue damage by combining real-time dynamic hot spot temperature and high-frequency equivalent partial discharge; finally outputting a health status index. This invention integrates the time-varying evolution of thermal stress and the multi-physics field transient synergistic damage mechanism, significantly improving the accuracy of equipment damage quantification.

The application discloses a kind of active behavior control system and method based on dynamic parameter hysteresis feedback.The system takes the feedback loop of dynamic parameter as one of main control mechanisms, optionally combined with hysteresis mapping to prevent state frequent switching, and can integrate multi-modal emotion adaptive cooling, explainability generation, compliance audit, positive feedback incentive and social collaboration, atomic ability management and value realization, etc. The whole link closed loop containing task execution and value realization is realized in optional embodiment. The application is helpful to improve at least one of response sensitivity, control stability and feedback attribution accuracy of the system by means of asymmetric response, hysteresis interval, causal reasoning, feedback attribution and event binding, safety fuse and autonomous authority boundary definition, intention safety pre-check, offline autonomy, resilience engineering and disaster recovery, cross-cultural adaptation and fairness protection, etc. It provides an active behavior control scheme that can be independently deployed and extended as needed.

The application discloses a dynamic voltage regulation and power balance control method and system in an integrated circuit, and particularly relates to the technical field of integrated circuit power management, which measures the timing margin, load change slope and voltage undershoot amplitude of a key path in real time, calculates a timing robustness quantitative value, calculates a leading compensation pulse and sends the same before load jumping, dynamically switches PID coefficients to suppress nonlinear oscillation, stretches a clock or freezes a pipeline when the timing robustness quantitative value is lower than a first threshold value, inserts idle instructions to cut off positive feedback when the product of a current change rate and a temperature gradient is higher than a second threshold value, decouples and isolates a calculation core from peripheral logic, and calibrates the first and second threshold values, so that the application suppresses voltage transients through the leading compensation pulse, reduces timing violation risks, blocks metastable state propagation and positive feedback cycles through clock stretching or pipeline freezing and forced idle instructions, and improves adaptive capacity through voltage domain decoupling and isolation and stable state feedback calibration of threshold values.

The embodiment of the application provides a high reverse maintaining DDSCR electrostatic protection device and a chip, the high reverse maintaining DDSCR electrostatic protection device comprises: a first conductive type substrate; a second conductive type buried layer; a well structure group located on the second conductive type buried layer, the well structure group comprises a plurality of first conductive type wells and second conductive type wells arranged alternately; an anode structure, the anode structure comprises a first anode heavily doped region and a second anode heavily doped region; a cathode structure, the cathode structure comprises a first cathode heavily doped region, a second cathode heavily doped region and a third cathode heavily doped region; a floating doping structure, the floating doping structure comprises at least one floating second conductive type heavily doped region. The scheme can realize bidirectional signal port electrostatic protection by increasing the floating doping structure, reducing the positive feedback of the parasitic SCR path, increasing the reverse maintaining voltage, keeping the reverse maintaining voltage consistent with the forward maintaining voltage.

An active filter, system, chip and electronic device, comprising: an input end of an RC filter module receives a to-be-filtered signal of the active filter to passively filter the to-be-filtered signal to obtain a passively filtered signal; an output end of a voltage follower module outputs a voltage following the rise and fall of the passively filtered signal to obtain a voltage following signal; a flip voltage follower module makes the filter output end output a voltage following the rise and fall of the voltage following signal to obtain an actively filtered signal; the filter output end is an output end of the active filter; a positive feedback module is connected between the filter output end and the RC filter module, and when the frequency of the to-be-filtered signal falls within a preset cutoff range, the positive feedback module is used to feed back the actively filtered signal to the RC filter module. By setting the flip voltage follower module, the output impedance of the active filter is reduced, so that the active filter can be applied to a high-frequency scene.

This invention relates to the field of power electronics technology and provides a single-sensor control method and system for LCL-type grid-connected inverters. The method includes: transmitting the difference between the incoming grid current and a current reference to a current regulator to obtain the regulator's output; superimposing the incoming grid current onto the regulator's output in a positive feedback manner after passing it through a second-order digital filter to obtain a modulation signal; and generating a PCC voltage estimate based on the modulation signal and the incoming grid current through the superposition of two transfer functions, followed by obtaining the current reference through a phase-locked loop structure and trigonometric function calculations. The control structure is very simple, reducing the computational complexity of the control chip in practical applications.

This invention belongs to the field of motion control systems and relates to a state perception and fault-tolerant control method for motion control systems under sensor failure. The method includes: representing the dynamic characteristics of the motion control system under sensor failure using a disturbed second-order system model; constructing a state-space control model of the motion control system; correcting distorted state feedback signals using a state feedback self-corrector; estimating the lumped disturbance of the system model using an improved fuzzy approximator based on an adaptive update rate to obtain lumped disturbance observations; estimating the state variables of the motion control system using a self-correcting state observer to obtain state observations; and designing a state feedback fault-tolerant controller using the state observations and lumped disturbance observations. This invention effectively solves the key problem of feedback signal distortion in motion control systems under sensor failure scenarios, and has advantages such as accurate estimation of unmodeled disturbances, good feedback signal correction effect, and accurate system state estimation.

The application discloses a combined cycle unit fuel optimization configuration method, and particularly relates to the technical field of fuel optimization configuration, and gradually adjusts and feedback corrects fuel ratio by constructing a fuel combustion coupling representation set, extracting a propagation imbalance feature, analyzing pressure oscillation and heat release coupling behavior, identifying a positive feedback coupling link, and constructing a closed-loop fuel optimization configuration strategy, thereby cutting off the positive feedback coupling link from reaction rate mismatch to stable boundary approximation, effectively suppressing combustion fluctuation and instability risk, and improving the safety and fuel adaptability of unit operation.

This invention relates to the field of control technology for fuel-powered rotorcraft, and in particular to an automatic speed control method for fuel-powered rotorcraft engines. Through bench testing and flight experiments, a multi-dimensional adaptive control parameter table is constructed using current power, target power, and altitude as three-dimensional indexes to quantify engine acceleration and deceleration characteristics. After the flight control system identifies the power demand in real time, it calls the parameter table to query the engine power response time and attitude loop response time, and calculates the dynamic lead based on the formula, achieving a synchronization effect where "different control start times, the same target arrival time." Simultaneously, a feedforward + incremental PID feedback composite control is employed, and the parameter table is iteratively corrected online based on actual operating data. This invention fundamentally cuts off the positive feedback coupling link between speed and attitude, significantly reducing speed overshoot and attitude fluctuations, and improving flight stability, control precision, and fuel economy.

The application discloses a grid-connected converter active damping control method and belongs to the field of converter control. The control method is characterized in that a first-order unstable digital filter is connected in series on a positive and negative feedback path of a capacitor voltage, a reasonable parameter is used for design, and a phase compensation characteristic of the filter is fully utilized to compensate for a phase lag introduced by digital control. The filter can guarantee the stability of the system and improve the robustness of the system in the case of nonlinear change of grid impedance inductance and weak grid, and the filter has few design parameters and a simple design process. The converter loop structure adopting the control method is simple, convenient to design, large in system stability margin, and suitable for three-phase LCL filter grid-connected / following grid type converter occasions.

The application belongs to the field of integrated circuit design, and proposes and serial conversion circuit, which is used for solving the problem of readout signal attenuation in the transmission process and the problem of readout signal error code caused by excessive parasitic capacitance, so as to improve the performance of the image sensor. The application comprises a current type SA circuit, a three-state gate module and a shift register, wherein the current type SA circuit is divided into two parts, namely a column parallel local circuit and a global circuit, which are respectively recorded as local module and global module; the working process is divided into two steps: the first step is completed by the current type SA circuit, and S column parallel data is converted into S / M group parallel data; the second step is completed by the three-state gate module and the shift register, and S / M group parallel data is converted into S / M group serial data. The application is mainly applied to the occasion of integrated circuit design and manufacturing.

The application provides a level conversion circuit, a high-side high-voltage drive circuit and an electronic device. A first level output unit of the level conversion circuit is configured to access a first level signal. A second level output unit is configured to access a second level signal. The first level signal has a weaker adjustment capability on the input end level than the second level signal. A threshold determination unit has an input end and an output end. The input end is connected with the first level output unit and the second level output unit and configured to access the first level signal or the second level signal. The output end is configured to output a first conversion signal based on the level of the input end. A positive feedback module is connected with the input end and the output end and configured to positively adjust the level of the input end based on the first conversion signal. The level of the input end is adjusted based on the first conversion signal through the positive feedback module, which is conducive to accelerating the change speed of the input end level and further conducive to quickly stabilizing the first conversion signal.

The present disclosure relates to a p-type bulk silicon memory device, and more particularly, to a technology that implements stable and reliable memory operation by utilizing positive feedback and negative feedback mechanisms based on a triple-well structure and a p-n junction isolation layer, and provides low power consumption and high integration density without a capacitor. In particular, the present disclosure meets the requirements of next-generation memory devices and provides solutions suitable for various electronic devices through miniaturization and high integration.

This utility model relates to the field of crane hook technology, specifically a crane hook pulley assembly, including a fixed shell, a first roller, a load-bearing hook, and a mounting hook. The first roller is rotatably connected to the middle of the fixed shell, the load-bearing hook is rotatably located inside the right side of the fixed shell, and the mounting hook is located inside the left side of the fixed shell. The first roller has a positioning component for positioning and fixing the rope inside. In this crane hook pulley assembly, the positioning component inside the first roller includes two "L"-shaped positioning plates, with the pivot at the bend located on the right side of the first roller away from the center. Multiple second rollers are rotatably connected to the positioning plates. The rope passes between the first and second rollers, forming a shape that is wide at the bottom, narrow in the middle, and wide at the top. By utilizing gravity, the rope is pulled to achieve an automatic positive feedback tightening and positioning function, preventing the rope from slipping out, lowering the center of gravity of the fixed shell, and increasing the stability of the device operation.

The present application relates to the technical field of computing power scheduling, in particular to a dynamic computing power scheduling method and system for AI training tasks, which realizes the quantification of node thermal risk by obtaining the thermal state pressure index through the weighted calculation of thermal margin and temperature rise trend; obtains the static leakage power consumption from the total power consumption by stripping the dynamic power consumption, obtains the electrical state pressure index by combining the leakage temperature coefficient, and accurately identifies the risk of node thermal-electric positive and negative feedback instability; captures the implicit collapse problem of long-term performance of the node by calculating the deviation accumulation state through the exponential moving average; calculates the expected cooling time based on the heat capacity, cooling heat dissipation rate and idle power consumption, locks the scheduling state through the time lock mechanism, and offsets the influence caused by the inertia of the cooling system; realizes multi-dimensional risk warning, and the warning dimension is more comprehensive and the prediction accuracy is higher; calculates the computing power loss factor through the thermal and electrical pressure index, corrects the nominal computing power to obtain the effective available throughput, so that the scheduling and distribution of the AI training operator are more suitable for the real running state of the node.