116 results about "Continuous mode" patented technology

A system for automated extraction of biological samples from a set of biological samples has a small footprint and minimal movement of consumable sets, thereby reducing potential contamination during the extraction process. The extraction system includes a set of reaction tubes, a storage unit for storing a set of consumables, a sample preparation unit, a sample extraction unit, a waste unit, a plurality of robots for moving the tubes, samples, and cassettes, and a programmable control system programmed to process the samples in a serial mode in which a series of samples are processed sequentially in time one after another, thereby maintaining a continuous mode. Thus, a fixed processing turnaround time for each sample is maintained regardless of when the sample starts processing.

The invention relates to the technical field of artificial intelligence, and provides an asymmetric low-rank fine tuning model training method and device, equipment, a medium and a product. The method comprises the following steps: constructing a multi-task data set; the multi-task data set comprises a plurality of task classification data sets, and each task classification data set comprises sample data of a plurality of continuous modes; based on the multi-task data set, pre-training the initial model to obtain an asymmetric low-rank fine tuning model; the asymmetric low-rank fine tuning model comprises an asymmetric low-rank adapter, the asymmetric low-rank adapter is fine-tuned based on a first matrix and a plurality of second matrixes, and the number of the second matrixes is determined based on a statistical vector of each piece of sample data. By means of the mode, the problem that the number of the second matrixes needing to be used by the model is difficult to determine is solved, the model adopting the asymmetric low-rank adapter architecture is applied to a multi-task classification scene of a continuous mode, and the application scene of the asymmetric low-rank adapter architecture is expanded.

A high bandwidth factorized power system comprises a discontinuous-mode regulator supplying the input of a fixed-ratio power converter providing an output voltage. The discontinuous-mode regulator delivers power to the fixed ratio converter in a series of operating cycles, each cycle comprising an input phase during which energy is drawn from the input source to an inductor and an output phase during which energy is delivered from the inductor to the regulator output. A controller begins the input phase of an operating cycle of the regulator after the end of the output phase upon sensing that the output voltage is below a minimum voltage threshold.

The utility model discloses a composite laser polishing device based on ultrasonic micro-forging, which comprises a sealed cabin, a three-axis guide rail system arranged in the sealed cabin and driven by a motor, a rotating disc arranged on a Z-axis direction movement guide rail, a replaceable working panel mounted on the rotating disc, an inflation switch, an exhaust switch and a clamp mounted on the working panel, the ultrasonic micro-forging device cabin is arranged on the Z-axis direction movement guide rail; and the ultrasonic generator is matched with the ultrasonic micro-forging device cabin. A cabin pressure detection sensor and an oxygen concentration sensor are arranged in the sealed cabin; the system further comprises an infrared optical fiber laser, an integrated ultraviolet optical fiber laser and corresponding optical assemblies. According to the polishing device, an oxide layer on the surface of a workpiece is removed in a pulse mode of the infrared laser, and then the continuous mode is switched for fine polishing. The ultraviolet laser adopts a pulse mode to assist in machining, and the ultraviolet laser and the pulse mode cooperate to improve the polishing effect. And after polishing is completed, the surface of the workpiece is subjected to strengthening treatment through an ultrasonic micro-forging device.

The invention discloses a method for improving the strength and plasticity of a middle-high layer staggered energy metal material, and belongs to the technical field of metal material preparation and processing. According to the method, N times of deep cooling online treatment (N is larger than or equal to 2) are carried out on the middle-high layer staggered energy metal material, a deep cooling medium is liquid nitrogen or liquid helium, plastic deformation is achieved by means of continuous rolling and other processes, and online aging heat treatment can be carried out between the treatment chambers. After treatment, the material forms a nano twin crystal structure, so that the strength and plasticity are synergistically improved, and the high conductivity is kept. According to the method, the limitation of a traditional strengthening technology is broken through, dislocation motion and stress distribution are regulated and controlled through the nano twin boundaries, fracture is avoided, and the conductivity is guaranteed. Meanwhile, the technology can be operated in an integrated and continuous mode, is suitable for large-scale production of wires and thin strips, is high in machining efficiency and stable in performance batch, and meets the requirements for metal materials of high-end connectors in the fields of integrated circuits, new energy automobiles and the like.

A device adapted to be secured to the foot of a user includes one or more vibration actuators configured to provide vibrations to the user's foot, one or more force or acceleration sensors configured to sense forces or acceleration exerted by the user's foot, and a controller configured to operate the vibration actuators in a continuous mode to provide intermittent vibration to the user's foot independent of information sensed by the force or acceleration sensors. The vibration includes a first period of continuous vibration followed by a second period of no vibration followed by a third period of continuous vibration. The device may also be configured to operate in a feedback mode.

The invention provides a mixed-mode beat control method and system for a press in a continuous stamping production line, and relates to the technical field of industrial automation control, and the method comprises the steps: determining a cooperative control standard, an operation safety boundary and a control technical index through obtaining related data of the continuous stamping production line; on the basis, the initial phase interval of a sliding block of the target press switched to the discontinuous mode is adjusted, a target phase interval is obtained, and a data transmission channel among all the presses, the mechanical arm and the robot in the continuous stamping production line is established; first operation state data of all the presses, the mechanical arm and the robot are collected through the channel, so that the actual operation rhythm of the mixed mode of the presses in the continuous stamping production line is adjusted, the adjusted rhythm is obtained, the continuous stamping production line can operate according to the continuous mode after any press is switched to the discontinuous mode, and the continuous stamping production line can operate according to the continuous mode. And the self-adaptive coordination of the whole-line rhythm in the mixed mode of the press is realized.

Systems and methods are disclosed for dynamically switching an ion guide and a TOF mass analyzer between concentrating or not concentrating ions in a targeted acquisition. Product ions are ejected from the ion guide into the TOF mass analyzer and the intensity of a known product ion is measured at two or more time steps. The ion guide initially ejects product ions using a sequential or Zeno pulsing mode that concentrates product ions with different m / z values within the TOF mass analyzer at the same time. If the intensity of the product ion is increasing and greater than a threshold intensity, the ion guide switches to a continuous or normal pulsing mode that does not concentrate ions with different m / z values in the TOF mass analyzer at the same time. Similarly, if the intensity decreases below a threshold in continuous mode, the ion guide switches back to sequential mode.

The utility model discloses a sole with a composite structure, which comprises a midsole and a supporting piece, the midsole comprises a first elastic part, the supporting piece is arranged in the first elastic part, a plurality of hollow crystal lattices are formed in the supporting piece, and the crystal lattices are filled with the first elastic part, so that the first elastic part and the supporting piece form an integrated structure. According to the shoe sole with the composite structure, the supporting piece is arranged in the first elastic part of the middle sole, the first elastic part is filled in the crystal lattice of the supporting piece, and the first elastic part and the supporting piece form an integrated structure, so that the supporting, torsion resistance and stability of the shoe sole are better while the weight of a product is not increased, and the service life of the shoe sole is prolonged. The supporting piece is integrally arranged to be of a wedge-shaped structure, the supporting piece comprises a first face, a second face and a third face which are arranged in a continuous mode, the cross section of the supporting piece forms a triangle, and the stable supporting effect on the heel area and the middle foot area can be achieved.

Device for controlling at least one light-emitting diode (LED1) to generate short light pulses (LP),- with an H-bridge (H) consisting of a first half-bridge (HB1: T1, T2) with a first transistor (T1) and a second transistor (T2) and a second half-bridge (HB2: T2, T3) with a third transistor (T3) and a fourth transistor (T4),- wherein the H-bridge (H) is controlled by a control unit (ST) and- wherein the H-bridge (H) can be operated by the control unit (ST) in pulsed mode (GPB) and in quasi-continuous mode (QDB) and- wherein the first half-bridge (HB1: T1, T2) is supplied with electrical energy from a first positive supply voltage (VCC1) and a first negative supply voltage (GND1) and- wherein the second half-bridge (HB2: T3,T4) is supplied with electrical energy from a second positive supply voltage (VCC2) and a second negative supply voltage (GND2) and- wherein the light-emitting diode (LED1) is connected with its cathode (K) to the output of the first half-bridge (HB1: T1, T2) and- wherein the light-emitting diode (LED1) is connected with its anode (A) to the output of the second half-bridge (HB2: T3, T4) and- wherein the first positive supply voltage (VCC1) and the second positive supply voltage (VCC2) can be equal and- wherein the first negative supply voltage (GND1) and the second negative supply voltage (GND2) can be equal and- wherein the light source, in particular the one or more light-emitting diodes (LED1), represents the load of the H-bridge (H) between the output of the first half-bridge (HB1: T1, T2) and the output of the second half-bridge (HB2: T3, T4) and- wherein the control device (ST) is designed to operate in pulsed mode (GPB) a “PAn” condition,in which a forward voltage in the forward direction of the light-emitting diode (LED1) is applied to the light-emitting diode (LED1) through the H-bridge (H), is not maintained by the H-bridge (H) for longer than a turn-on time (τpp), and- wherein the control device (ST) is designed so that in pulsed operation (GPB) a "PAus" state, in which a reverse voltage against the forward direction of the light-emitting diode (LED1) is applied to the light-emitting diode (LED1) through the H-bridge (H), is not maintained by the H-bridge (H) for longer than a clearing time (τpn), and- wherein the clearing time (τpn) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1), and- wherein the turn-on time (τpp) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1).

The present application relates to the field of medical packaging, in particular to a double-chamber bacteria blocking delivery system, comprising: a bottle body, the inside of which is blocked by a piston; a positioning sleeve, which is sealingly fixed on the bottle body and elastically connected with the piston; a push rod sleeve, which is sealingly sleeved on the positioning sleeve and connected with the piston, the push rod sleeve being provided with a liquid outlet hole and a gas return hole, the gas return hole being provided with a hydrophobic bacteria blocking filter membrane; a kinematic pair with locking function, which is arranged between the push rod sleeve and the positioning sleeve; a drop head, which is movably sleeved on the push rod sleeve and provided with a drop hole; a delivery assembly, which is arranged between the push rod sleeve and the drop head and axially elastically contacts the push rod sleeve, the delivery assembly being provided with a liquid outlet channel, the liquid outlet channel being always connected with the liquid outlet hole and being connected with the drop hole in a manner of being connected in a continuous mode and disconnected in a discontinuous mode; and a gas return channel, which is arranged between the push rod sleeve and the drop head. The present application has the advantages of high safety in transportation and storage, convenient operation and no need of additional placement of preservatives.

Matching circuitry is disclosed for power generation in a plasma processing apparatus or other application. Matching circuitry is provided in a unitary physical enclosure and is configured to provide impedance matching at multiple different frequencies. For example, in a dual frequency implementation, first and second RF generators can provide electromagnetic energy at first and second respective frequencies in a continuous mode or a pulsed mode to matching circuitry that includes first and second circuit portions. The first circuit portion can include one or more first tuning elements configured to receive RF power at a first frequency and provide impedance matching for a first ICP load (e.g., a primary inductive element). The second circuit portion can include one or more second tuning elements configured to receive RF power at a second different frequency and provide impedance matching for a second ICP load (e.g., a secondary inductive element).

The invention discloses a laminated battery cell, a preparation method thereof and a pole piece structure, the laminated battery cell comprises a first pole piece assembly, a diaphragm and a second pole piece assembly, the first pole piece assembly comprises a first current collector and a first active substance, the first current collector is provided with a plurality of coating areas, and a spacer area is arranged between two adjacent coating areas; first active substances are arranged on the coating areas, the coating areas and the first active substances on the coating areas form first pole pieces, and every two adjacent first pole pieces are connected through a spacer area; the diaphragms comprise a first diaphragm and a second diaphragm, and the first diaphragm and the second diaphragm are respectively arranged on two sides of the first pole piece and the spacer region; the second pole piece assembly comprises a plurality of second pole pieces, and the second pole pieces are arranged on the side, away from the first pole piece, of the first diaphragm and the side, away from the first pole piece, of the second diaphragm. According to the first pole piece assembly, the first pole pieces are directly and continuously supplied in a continuous mode, dust pollution caused by pole piece cutting operation is avoided, and the risk that dust enters a core package is effectively reduced.

The utility model discloses a thermal insulation glove which comprises a front piece, a back piece and a connecting portion, the back piece is arranged on the two sides of the connecting portion in a continuous mode, and the front piece is arranged on the back piece to form a first containing cavity and a second containing cavity. One end, close to the connecting part, of the back sheet and one end, close to the connecting part, of the front sheet form an inserting opening, and the width of the inserting opening of the first containing cavity is smaller than that of the inserting opening of the second containing cavity. The thermal insulation glove can improve the use flexibility, is convenient to operate, can adapt to multi-angle free opening and closing between the thumb and other fingers, has ornamental value and is suitable for various scenes, and the fingers are not prone to fatigue.

The invention discloses a control method of a whole-piece device for a bamboo fibrosis recombination unit. The control method comprises the steps that S1, feeding conveying control is conducted, specifically, a control system controls a first rotating source and a second rotating source to operate, so that a first conveying belt operates in a continuous mode, and a second conveying belt operates in a stepping mode; s2, straightening control is conducted, specifically, the two ends of the bamboo fibrosis recombination unit are controlled to be straightened in sequence; s3, pushing control is conducted, and lap joint of every two adjacent bamboo fibrosis recombination units is achieved; and S4, knitting control is conducted, specifically, the control system drives a knitting mechanism to operate to conduct knitting treatment on the lapped bamboo fibration recombination units on the second conveying belt. Advancing of the recombination units is achieved through the front conveying belt and the rear conveying belt, lap joint of every two adjacent recombination units is achieved at the joint position of the two conveying belts, working procedure decomposition is clear, mechanical time sequence coordination is precise, full-automatic control is achieved, continuity of the lap joint process of the bamboo fibrosis recombination units is guaranteed, and product quality is guaranteed.

The present invention discloses an automatic recognition circuit for the operating mode of a switching power supply, comprising a resonance detection circuit, a mode recognition circuit, and a PWM signal generation circuit. The present invention can automatically and accurately distinguish between continuous and discontinuous modes, providing more reliable preparation for valley-turning of MOS transistors. Furthermore, because it can more accurately distinguish between continuous and discontinuous modes, it can more promptly and accurately initiate valley-turning of the MOS transistor in discontinuous mode, thereby improving energy efficiency. Furthermore, except for the third D flip-flop in the mode recognition circuit, the remaining D flip-flops can be expanded as needed, providing strong compatibility. Furthermore, the resonant signal is detected by using gate-drain parasitic capacitance, making the system simpler and thus eliminating the resistors R1 and R2 in conventional AC / DC power supply circuits, thus saving costs.

The present invention discloses a compressor boost control method, system, and related equipment. The method includes real-time detection of the peak voltage of the compressor busbar, and performing PI control based on the peak voltage and a preset peak voltage setting value to obtain an input current gain; collecting the mains voltage, calculating the effective voltage of the mains based on the collected mains voltage, and calculating the amplitude voltage of the mains based on the effective voltage to obtain a target amplitude voltage; determining the input phase of the mains voltage based on the target amplitude voltage and the collected mains voltage, and calculating the target value of the input current based on the input phase and the input current gain; and controlling the on / off state of the MOS tube in the circuit based on the target value and the actual value of the input current. In this method, boost control is achieved in a critical continuous mode through dual closed-loop control of voltage and current, which can significantly improve conversion efficiency and significantly reduce electromagnetic interference.

This invention provides a flyback power supply, a synchronous rectification control circuit, and a method, comprising: a turn-on control module for generating a turn-on control signal for the synchronous rectifier; a turn-off control module for generating a turn-off control signal for the synchronous rectifier when the drain-source voltage of the synchronous rectifier rises to a turn-off threshold, and simultaneously adjusting the turn-off threshold based on the peak value of the drain-source voltage of the synchronous rectifier; and a drive signal generation module for generating a drive signal for the synchronous rectifier based on the turn-on control signal and the turn-off control signal; wherein the turn-off threshold is a negative value. This invention automatically adjusts the turn-off threshold according to the drain-source voltage of the synchronous rectifier, solving the voltage stress problem caused by common operation in continuous mode, enabling the system to operate safely and efficiently in continuous mode; simultaneously, it achieves maximum conduction time in discontinuous mode, resulting in high system efficiency; furthermore, this invention reduces the comparator delay requirement and eliminates the need for specific processing of the primary-side control drive, making it simple and easy to implement.

The invention discloses a duty ratio compensation method and system of a Boost circuit. The method comprises the following steps: determining a reference maximum value of an inductive current of the Boost circuit and a unit sine wave value of the Boost circuit; obtaining a reference value of the inductive current of the Boost circuit according to the reference maximum value of the inductive current and the unit sine wave value; according to the reference value of the inductive current, the inductive current value of the Boost circuit, the input voltage and the output voltage, judging whether the Boost circuit meets a duty ratio compensation condition or not; if yes, the duty ratio of the Boost circuit is compensated, so that the control voltage in the discontinuous mode is equivalent to the control voltage in the continuous mode, the accuracy of current control of the Boost circuit is improved, and the problem of zero crossing point distortion of the Boost circuit is avoided.

The invention discloses reactive ion etching equipment and an etching method for processing a semiconductor device, and relates to the technical field of semiconductor etching, and the reactive ion etching equipment comprises a reaction cavity which is provided with an upper gas distribution area and a lower sample placement area; wherein at least a first chamber and a second chamber are formed in the reaction chamber, the first chamber and the second chamber cover part of the wafer, and airflow control units are arranged in the first chamber and the second chamber; etching gas passes through the plasma from top to bottom and forms a sheath layer above the sample stage, so that ions generated by the plasma pass through the sheath layer and then are incident towards the surface of the wafer. Through the combination of structural partition, movable recovery and variable gas supply, sample table cooperation and closed-loop sequential control, the etching stability in a continuous mode is kept, the influence of by-product accumulation on the etching precision in a pulse mode is reduced, and the repeatability, the selective control capability and the device yield of pulse etching are improved.

The invention belongs to the technical field of power distribution control, and relates to a box-type substation low-voltage circuit breaker remote control system and method, and the system comprises a control power input terminal, a local and remote mode switching unit, an electric operation mechanism, a low-voltage circuit breaker, a state indication unit, and an alarm indication unit. The source state switching module is used for judging the states of the equipment side power supply and the standby power supply and supplying power to the control loop according to a priority rule; the mode interlocking module is used for selecting an instruction source according to a mode state and shielding a non-corresponding signal; and the state freezing module is used for outputting an abnormal signal and freezing the control loop when the auxiliary contact state is inconsistent with the mechanism position signal. According to the technical scheme, through multi-layer logic of power supply judgment, mode interlocking and state freezing, continuous power supply control, safe mode switching and reliable state monitoring are achieved, and the operation requirements of continuous controllability, safe action and accurate state display are met.

The invention discloses a continuous load modulation balanced power amplifier based on a harmonic suppression coupler, equipment and a method. The amplifier comprises a power divider, a power divider and a harmonic suppression coupler, the first branch comprises a first input matching network, a first transistor and a first output matching network in sequence; the balance branch comprises a phase compensation line, a front matching network, an input end 3dB directional orthogonal coupler, a second branch, a third branch and an output end 3dB directional orthogonal coupler, and the second branch comprises a second input matching network, a second transistor and a second output matching network which are connected in sequence; the third branch comprises a third input matching network, a third transistor and a third output matching network which are connected in sequence; and post-matching the network. According to the continuous load modulation balanced power amplifier, the design of continuous mode impedance of the continuous load modulation balanced power amplifier and the improvement of the overall drain efficiency are realized by adopting the harmonic suppression coupler, so that the full working frequency band can work efficiently, and the design of a corresponding matching network is simplified.

The invention discloses an acceleration level continuous quaternion trajectory planning method, system and device and a medium, relates to the technical field of mechanical arm control, and solves the technical problem that acceleration level planning cannot be performed on the tail end posture of a robot. A vector transformation rule is utilized to determine a quaternion attitude rotation direction, and quaternion ambiguity is eliminated; according to the method, quaternion decoupling is achieved through the transformation relation between descriptors, interpolation is conducted on the decoupled pose in an acceleration level continuous mode, it is guaranteed that the smoothness of the mechanical arm in the movement process is achieved, meanwhile, singularity is avoided, and error calculation is simplified. While robot end posture acceleration level planning is achieved, universal joint locking existing in the movement process is avoided, and complexity in the mechanical arm planning process is reduced.

A common-mode voltage generation method is provided and comprises: obtaining a DC voltage, AC voltages, and a modulation index of a DC / AC converter; generating an injection instruction of a common mode voltage for pulse width modulation based on the DC voltage, the AC voltages, the modulation index, and an adjustable modulation control factor; and providing the injection instruction to the converter, in which the injection instruction is used to instruct the converter to adjust the common mode voltage variably in accordance with changes in the modulation index and the modulation control factor. This disclosure enables the automatic adjustment of the common-mode-voltage according to the DC voltage and the AC voltages, based on pre-defined performance of the converter in terms of switching losses, CMV, and harmonics. With this automatic adaption, the modulation of the converter is changed between discontinuous mode to continuous mode.

The utility model discloses a composite mode multi-wavelength laser rehabilitation therapeutic instrument, which comprises a controller, a pulse mode driving board, a continuous mode driving board, a composite mode laser module and an optical fiber module, the laser diode group comprises a plurality of pulse laser diodes with the wavelength range of 800-1100 nm and a plurality of continuous laser diodes with the wavelength range of 400-1100 nm, and the controller is connected with the pulse mode driving board and the continuous mode driving board. The pulse mode driving board and the continuous mode driving board are respectively connected with the composite mode laser module, and the composite mode laser module is connected with the optical fiber module, so that high-efficiency coupling of a plurality of low-power laser diodes can be realized, high-peak power and multiple wavelengths are realized, pulse laser and continuous laser can be output, and the optical fiber module is connected with the pulse mode driving board and the continuous mode driving board. The flexibility is high and the effect is good.

Headlights (SW), in particular for use in vehicles,- with at least one first LED (LED1) as a light source and- wherein the headlight (SW) may include further light sources and- wherein the headlight (SW) emits light in a emitted wavelength range (AWB) in the visible wavelength range and- wherein the headlight (SW) is capable of emitting light pulses in at least one visible wavelength range, the light pulsed wavelength range (LPWB) and- wherein the light pulsed wavelength range (LPWB) is a sub-range of the emitted wavelength range (AWB) of the headlight (SW) or is equal to the emitted wavelength range (AWB) of the headlight (SW) and- wherein the first LED (LED1) can emit light in this light pulsed wavelength range (LPWB) and- with an H-bridge (H) for controlling and supplying the first LED (LED1) with electrical energy,- wherein the H-bridge (H) is controlled by a control device (ST) and- wherein the H-bridge (H) can be operated by the control device (ST) in pulsed mode (GPB) and in quasi-continuous mode (QDB) and- wherein the control device (ST) is designed such that in pulsed mode (GPB) a "PAn" state, in which a forward voltage in the forward direction of the LED (LED1) is applied to the LED (LED1) by the H-bridge (H), is not maintained by the H-bridge (H) for longer than a turn-on time (τpp) and- wherein the control device (ST) is designed such that in pulsed mode (GPB) a "PAus" state, in which a reverse voltage is applied to the LED (LED1) by the H-bridge (H), is not maintained by the H-bridge (H) for longer than a turn-off time (τpn)and- where the clearing time (τpn) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1) and- where the turn-on time (τpp) is less than the charge carrier lifetime (τ) in the PN junction of the light-emitting diode (LED1).

The invention provides a variable-speed bearing fault diagnosis method and system based on SVMD and rotating speed estimation, and the method comprises the steps: obtaining an accurate fault feature value of a bearing through estimating the rotating speed of the bearing, employing SVMD to decompose a vibration signal, carrying out the denoising reconstruction, carrying out the envelope demodulation and order analysis of a reconstructed signal, comparing the feature frequencies of different parts of equipment with an envelope threshold value according to the rotating speed, and carrying out the fault diagnosis of the bearing. Therefore, the fault part is judged, the function of accurately identifying the fault part of the bearing is realized, and the bearing fault can be effectively diagnosed. The rotating speed of the variable-speed equipment is obtained without installing a rotating speed sensor, so that feature extraction and fault diagnosis are carried out on the bearing, and the method is particularly suitable for the working condition of power frequency change caused by rotating speed change of the variable-speed equipment. According to the method, aiming at noise interference and power frequency change in the vibration signals of the variable-speed bearing, all intrinsic mode function components (IMF) are extracted in a continuous mode by adopting a sequential variational mode decomposition algorithm (SVMD), so that the noise interference in the signals is effectively removed.

A control device (50) for a DC-DC converter (10, 100) is provided with: an acquisition unit that acquires a current detection value of a current detection unit (42) that detects a current flowing through an inductor (30) in each opening / closing cycle of a switch (31); and a determination unit that determines whether the current control mode is a current discontinuous mode or a current continuous mode. The determination unit performs a calculation process for calculating a difference between the current detection values acquired at respective specific times of different opening / closing cycles, or a difference between the current detection values acquired at respective two specific times of each opening / closing cycle, and for determining whether the current detection values acquired at the respective specific times of each opening / closing cycle are different on the basis of the calculated difference. It is determined whether the control mode is a current discontinuous mode or a current continuous mode.

The present application provides an asynchronous FIFO memory, which comprises a synchronous FIFO memory and an asynchronous buffer. Data is written into the synchronous FIFO memory if there is a write request, the synchronous FIFO memory has a FIFO mode and a continuous mode, in the FIFO mode, the oldest written data is not allowed to be overwritten by the written data, in the continuous mode, the oldest written data is allowed to be overwritten by the written data. Data is read from the asynchronous buffer if there is a read request, the asynchronous buffer buffers the data read from the synchronous FIFO memory, the asynchronous buffer is not allowed to be written into when it is full, and the capacity of the asynchronous buffer is less than that of the synchronous FIFO memory. In this way, the area of the memory is saved, and the utilization of the memory is improved.

The application discloses a continuous mode bridgeless power factor correction circuit and a control method thereof, which comprises an alternating voltage source AC, a diode D1, a diode D2, a main switch Q1, a main switch Q2, an output capacitor C1, a positive half cycle control circuit and a negative half cycle control circuit. In the application, the freewheeling diode is reversely biased before the main switch is turned on, and the current is transferred to the control circuit auxiliary super-fast diode branch. The body diode of the freewheeling diode has no reverse current when the main switch is turned on, and can work at high frequency. Through proper dead zone setting, the freewheeling diode can realize zero voltage switching. The control circuit only works for a short time, the control method is simple, the average power is small, and the cost is low.