3929 results about "Sampling circuits" patented technology

The invention relates to the technical field of integrated circuit test and calibration, and discloses a chip test and calibration method and a chip tester. The chip test calibration method is applied to a chip test module and specifically comprises the following steps that S101, a starting signal sent by a user terminal is received, environment initialization operation is executed, and after initialization is completed, a system automatically enters a standby mode and waits for an external trigger signal or a user instruction; and S102, synchronously capturing input and output signal waveforms of the tested chip at a preset sampling frequency through a high-precision current sensor and a voltage sampling circuit. Through a dynamic parameter acquisition and real-time compensation technology, a voltage reference error is effectively reduced, the temperature control precision is superior to + / -0.3 DEG C, signal distortion caused by environmental interference is effectively inhibited, a multi-dimensional calibration model is combined with time domain, frequency domain and statistical characteristic analysis, nonlinear errors and system drift can be dynamically corrected, and the system performance is improved. And the attenuation error of a test signal transmission path is lower than 0.02 dB.

The invention relates to the technical field of data acquisition, and discloses a distributed photovoltaic data acquisition method and device based on time synchronization. The method comprises the following steps: performing distributed transmission processing on nanosecond synchronous acquisition reference signals through a time delay compensation network to obtain trigger synchronization signals of a plurality of acquisition nodes, and performing data acquisition processing through a multi-channel parallel sampling circuit to obtain original voltage and current data; and carrying out data verification processing on the original voltage and current data through a digital filtering algorithm to obtain effective acquisition data, carrying out string matching analysis processing to obtain string feature distribution, and carrying out data screening processing through a state evaluation algorithm to obtain real-time performance data of the photovoltaic module. Through high-precision clock synchronization and parallel sampling technologies, nanosecond sampling synchronization of a plurality of acquisition nodes is realized, and the acquisition data is ensured to have a strict time sequence corresponding relation, so that an accurate data basis is provided for performance evaluation and fault diagnosis of the photovoltaic module.

The invention discloses a method for dynamically adjusting the frequency of a resonant cavity of a cyclotron and a tuning circuit, which are applied to the field of cyclotrons and solve the problem that when the frequency of the resonant cavity of the cyclotron is adjusted by judging the magnitude of reflection power, due to the fact that the reflection power can change in multiple stages in a single macro pulse period, the frequency of the resonant cavity of the cyclotron is adjusted. And an accurate numerical value is difficult to obtain through a simple amplitude sampling circuit. According to the invention, through determining the stable resonance time period of the resonant cavity, the phase difference between the incident power signal and the reflection power signal is sampled in the corresponding stable resonance time period of the resonant cavity, and the change value of the phase difference between the incident power signal and the reflection power signal is dynamically compared. According to the conversion relation between the phase difference change value and the frequency change value, the resonant cavity frequency change value is obtained through conversion, then the resonant cavity tuning device is adjusted to enable the resonant cavity frequency to be consistent with the frequency of the incident power signal all the time, and the dynamic tuning method of the resonant cavity is achieved.

The invention provides a common-mode feedback circuit and a differential amplifier thereof, the common-mode feedback circuit comprises a sampling circuit and an amplifier circuit, the sampling circuit comprises a first input end, a second input end and a first output end, the first input end receives a first differential signal Voutp, and the second input end receives a second differential signal Voutn; the level shift module comprises a third input end, a fourth input end and a second output end, receives a common-mode signal VCMS and a reference common-mode signal VOCM output by the sampling circuit, and adjusts the common mode of the common-mode signal VCMS and the reference common-mode signal VOCM to enable the second output end to output a common-mode feedback signal VCMFB processed by the level shift module; the amplifier circuit receives a common mode feedback signal VCMFB. After the technical scheme is adopted, the same speed as that of a differential loop can be realized, the current of a main operational amplifier can be multiplexed, the power consumption of a common-mode loop is far lower than that of a main loop, and meanwhile, the common-mode level can be randomly adjusted.

The invention relates to the technical field of direct-current power supply fault diagnosis, in particular to a fault self-diagnosis modular direct-current power supply system, which is characterized in that a failure mechanism dynamic modeling unit constructs a multi-stress coupling degradation mapping library, adopts a degradation mechanism decoupling algorithm to separate and superpose failure effects and generates a dynamic degradation model; the early degradation capture unit deploys a high-frequency wide-domain sampling circuit and a noise suppression signal chain, combines time-frequency domain joint feature extraction and separates degradation feature signals from background noise, and the self-adaptive life prediction unit adopts a long short-term memory network and random forest fusion algorithm to dynamically correct parameters and output residual life probability distribution. The intelligent fault judgment unit realizes progressive diagnosis through a hierarchical threshold decision mechanism, and the health management cooperative execution unit triggers a pre-maintenance strategy, executes power flexible derating, redundancy switching or directional fusing isolation, and improves the reliability of the system.

The invention discloses a dual-compensation active common-mode EMI filter based on impedance mismatch and a design method thereof, and belongs to the technical field of filter design, the dual-compensation active common-mode EMI filter is connected between an interfered end and an interference source end, the dual-compensation active common-mode EMI filter comprises a voltage sampling circuit, a signal amplification circuit and a compensation circuit, the compensation circuit comprises a voltage injection module and a current injection module, the first end of the voltage injection module is connected with the first end of the voltage sampling circuit, the second end is connected with the second end of the signal amplification circuit, and the third end is connected with the first end of the interference source end; the first end of the current injection module is connected with the second end of the signal amplification circuit, the second end is connected with the third end of the voltage injection module, and the third end is connected with the second end of the interference source end. According to the invention, the insertion loss of the filter can be significantly improved, the filter has an effective bandwidth enough to cover and conduct electromagnetic interference, has better attenuation on full-band noise signals, and has the advantages of small size and high insertion loss.

The invention relates to the technical field of power supply circuits, in particular to a current sampling circuit, a chip and electronic equipment. The current sampling circuit comprises a first sampling branch, a second sampling branch and an operational amplifier, the sampling resistor is connected in series with a current branch to be measured; the output end of the first sampling branch is connected with the first input end of the operational amplifier; the first sampling branch is used for sampling first sampling voltage of the first end of the sampling resistor, and the second sampling branch is used for sampling second sampling voltage of the second end of the sampling resistor and outputting the second sampling voltage to the second input end of the operational amplifier; the operational amplifier is used for amplifying the difference value between the first sampling voltage and the second sampling voltage according to the amplification factor; the first sampling output end of the current sampling circuit outputs a first voltage value. When the current sampling circuit provided by the invention is used for high-side current sampling, errors caused by common-mode voltage are eliminated, so that the sampling precision is relatively high.

The invention discloses a current and voltage signal synchronous correction and output method and system, and relates to the technical field of power system analysis and control. Compared with a previous current and voltage signal correction method, the method solves the problems that traditional multi-channel signal acquisition depends on conventional clock control, and synchronization precision is insufficient; a conventional sampling circuit is weak in anti-interference capability. The problem that an existing scheme lacks efficient error prediction and dynamic optimization capability is solved. Through a multi-channel FPGA clock synchronization and double-differential sampling technology, complete acquisition of high-frequency transient characteristics of voltage and current signals is ensured; a dynamic calibration algorithm and multi-stage composite filtering are combined, so that common-mode interference and non-linear errors are effectively suppressed; and finally, through optical fiber isolation output and intelligent feedback control, signal full-link synchronous correction is realized, the electric energy metering error can be reduced, the fault positioning precision is improved, the characteristics of high precision, strong anti-interference and low energy consumption are realized, and a reliable data reference is provided for intelligent power grid and new energy grid connection.

The invention discloses a slurry detection device and method and a slurry coating system, and relates to the technical field of batteries. The conductive liquid and the target particulate matter filtered from the battery slurry sample are accommodated in the insulating groove, and the liquid and the target particulate matter in the insulating groove can flow into the hole pipe through the hole under the condition that the internal pressure of the hole pipe is greater than the external pressure. When target particles enter the hole pipe through the hole, a voltage pulse signal is generated. At the moment, the voltage sampling circuit connected in parallel with the direct-current power supply can detect the voltage pulse signal, and then the particle condition in the battery slurry can be determined according to the voltage pulse signal. Therefore, according to the slurry detection device provided by the embodiment of the invention, the particle condition of the battery slurry can be directly determined through the collected voltage pulse signal, manual observation and analysis through a microscope are not needed, the production efficiency is improved, and the potential safety hazard is reduced.

The invention relates to a driving control circuit and a switching power supply, the driving control circuit comprises a current sampling circuit and a light-load wave sealing circuit, the current sampling circuit is electrically connected with the light-load wave sealing circuit, the current sampling circuit samples current flowing through a load to obtain sampling current, and when the sampling current is greater than a current threshold value, the light-load wave sealing circuit is electrically connected with the light-load wave sealing circuit; the light-load wave sealing circuit outputs a first control signal to enable the second group of switching tubes to work based on a received second driving signal, so that the switching power supply rapidly quits the light-load wave sealing state, the current-carrying capacity of the switching power supply is rapidly improved, and when the sampling current is smaller than or equal to a current threshold value, the switching power supply is switched off. And the light-load wave sealing circuit outputs a second control signal to drive the second group of switching tubes to stop working, so that the second group of switching tubes are ensured to be closed in a light-load state, the switching loss during light load is effectively reduced, and the light-load energy efficiency is improved.

The invention provides a liquid crystal display lightening parameter self-adaptive calibration method, and relates to the technical field of image display. The method comprises the following steps: firstly, establishing a characteristic matrix and a parameter library of liquid crystal molecules, and dynamically correcting according to a real-time working state; and based on the characteristic matrix and the parameter library, executing pixel-level forward prediction on the input image, and generating a color error distribution diagram by solving a coupling solution of a liquid crystal molecule dynamic response differential equation and a backlight attenuation compensation equation. And taking the error distribution diagram as input, obtaining a gradient optimization direction of the calibration parameter mapping diagram through back propagation calculation, and iteratively approaching the optimal pixel value compensation amount in each frame period. And injecting a test pulse into the characteristic pixel point, capturing a voltage response curve through a sampling circuit, and converting the voltage response curve into a real-time correction value mapping graph. And finally, carrying out weighted fusion on the real-time correction value mapping graph and the pixel value compensation amount to generate a calibration parameter mapping graph. The self-adaptive calibration of the display parameters is improved, and the display consistency and the color accuracy are effectively improved.

Disclosed in the present invention are a resistor-based voltage-withstanding on-state voltage drop measurement circuit for junction temperature monitoring, and a monitoring method. The measurement circuit comprises: a high-resistance series high-voltage resistor RL; switching diodes D1 and D2; a low-voltage MOSFET M1; a phase inverter U1; a three-state gate U2; an RC delay circuit consisting of a resistor R1 and a capacitor C1; current-limiting resistors R2 and R3; auxiliary voltage sources VDD and VCC; an operational amplifier U3; and an isolation operational amplifier U4. The monitoring method comprises: designing an on-state voltage drop sampling circuit based on a high-resistance resistor, and performing parameter selection on the basis of an actual application scenario; measuring a collector current and on-state voltage drop model at different junction temperatures under offline conditions, so as to provide a calculation model for online monitoring; and under online conditions, performing online monitoring of junction temperature on the basis of the model obtained by means of performing testing under the offline conditions. The present invention has the advantages of being low cost, having high reliability, and adaptability to on-state voltage drop measurement at a high voltage and within a wide ambient temperature range.

The invention provides a calibration method and device for beam position measurement of a linear accelerator, and the device comprises a reference signal processing module which obtains real-time temperature and humidity values, receives multi-channel beams and reference signals, adjusts a trigger signal reflecting the time delay between the reference signals and the beam signals, and outputs a recombination signal of each beam and reference signal; a digital signal processing module of the beam signal processing electronics part comprises a sampling circuit for sampling to obtain a digital signal; the amplitude calculation unit is used for extracting the amplitudes of the beam and the reference signal; and the position calculation unit is used for solving the optimal amplitude change coefficient of the reference signal according to the real-time temperature and humidity values, correcting the amplitude of the reference signal by using the coefficient, calibrating the amplitude of the beam signal by using the correction result, and finally obtaining the beam position. According to the calibration equipment, the influence of channel inconsistency and temperature drift and long drift on position measurement can be effectively suppressed, and the position resolution and long-term operation stability of beam measurement are improved.

The invention discloses a rapid thermal simulation method and system for a semiconductor power assembly, and relates to the technical field of semiconductors, and the method comprises the steps: collecting a voltage V (t) signal and a current I (t) signal of the semiconductor power assembly in real time through a voltage and current sampling circuit, constructing a power pulse input sequence A, and carrying out the hot carrier accumulation analysis according to the power fluctuation change amplitude; introducing a transient thermal resistance function Zth (t), fitting the transient thermal resistance function Zth (t) with a hot carrier pulse response index Mcx after numerical integration to analyze junction temperature change caused by power pulse, and evaluating an equivalent junction temperature dynamic change rate; when the analysis result is that the thermal drift out-of-control trend exists, thermal risk analysis is carried out, and thermal risk state assessment is generated; the simulation model optimizes thermal model parameters and outputs thermal control suggestions through a rollback correction path, and the working state of the semiconductor power assembly is automatically adjusted. According to the method, real-time monitoring and effective prevention and control of thermal runaway can be realized, and the reliability and safety of the semiconductor power assembly are improved.

The invention discloses an LLC-DCDC fault protection method and device based on resonance current and pulse integration. The method comprises the following steps that an alternating current signal on an LLC converter resonance inductor is collected in real time through a resonance inductor current sampling circuit; inputting the current signal into a hardware comparator module, comparing the current signal with a preset current threshold value, and outputting a pulse signal; inputting the pulse signal into a pulse integral module for integral processing, and outputting an integral voltage signal; the CPU control unit receives a pulse signal output by the hardware comparator and an integral voltage signal output by the integral module in real time, and judges whether a fault occurs or not according to preset logic; and if the fault is judged, the driving signal of the primary inverter bridge of the LLC converter is cut off through the driving cut-off module.

The utility model relates to an anti-pinch detection circuit and a motor device, the anti-pinch detection circuit comprises a sampling circuit, a differential amplification circuit, a ripple signal conversion circuit, a low pass filter circuit and a controller, the sampling circuit samples a ripple current signal of a vehicle window motor to obtain a corresponding voltage sampling signal, and the voltage sampling signal is sent to the differential amplification circuit; the differential amplification circuit carries out differential amplification on the voltage sampling signal to obtain a voltage amplification signal, the voltage amplification signal is divided into two paths, one path is converted into square wave signals through the ripple signal conversion circuit, the controller determines the position of a car window according to the number of the square wave signals, and the other path is subjected to low-pass filtering through the low-pass filtering circuit to obtain the voltage amplification signal. If the position of the car window is located in the preset anti-pinch area, the controller determines whether the car window is locked or blocked or not according to the amplitude of the low-frequency ripple signal. The anti-pinch detection circuit adopts two-path detection, so that the influence of environment or other factors on the ripple current signal is avoided, further anti-pinch misjudgment is avoided, and the anti-pinch detection accuracy is improved.

The invention provides a power converter and an energy storage system, and belongs to the technical field of power electronics. The power converter provided by the invention comprises an NPC three-level balance circuit, a current sampling circuit and a control circuit. Wherein the current sampling circuit can sample current which flows through the midpoint of a bus and flows through a clamping diode included in a first bridge arm in the NPC three-level balance circuit. The control circuit can determine that the clamping diode or the internal switching tube in the first bridge arm has a short-circuit fault if the current is detected to be large under the condition that the external switching tube in the first bridge arm is switched on or the internal switching tube in the first bridge arm is switched off. At the moment, the control circuit stops outputting the PWM signal to the NPC three-level balance circuit, so that each switching tube in the NPC three-level balance circuit is turned off, and the diffusion of the short-circuit fault can be avoided. Therefore, short-circuit protection of the NPC three-level balance circuit is realized, and fire caused by electric leakage of the NPC three-level balance circuit is avoided.

The invention relates to a micro-current detection system, which comprises a clamping current sampling unit, a current amplification conditioning unit, an analog-to-digital conversion unit and a controller, and is characterized in that the clamping current sampling unit comprises a plurality of clamping sampling circuits which are sequentially connected in series, and the first clamping sampling circuit and the last clamping sampling circuit are both used for being connected to a detected sensor; the current amplification conditioning unit comprises differential amplification conditioning circuits, the number of the differential amplification conditioning circuits is associated with the number of the clamping sampling circuits, and the differential amplification conditioning circuits are electrically connected to the clamping sampling circuits in a one-to-one correspondence manner; the analog-to-digital conversion unit comprises an analog-to-digital converter, and the analog-to-digital converter is electrically connected to all the differential amplification conditioning circuits; the controller is electrically connected to the analog-to-digital converter. According to the invention, real-time, precise, continuous and dynamic self-adaptive sampling can be carried out on the micro-current through the clamping current sampling unit, and the current amplification gain does not need to be adjusted by frequently switching a sampling resistor. Moreover, the collection noise can be effectively suppressed, and the signal-to-noise ratio is improved.

The invention provides an arc voltage sampling circuit and method suitable for a welding power source. The arc voltage sampling circuit comprises an anti-interference absorption unit, a sampling conditioning unit and an isolation conversion unit. The anti-interference absorption unit is electrically connected to the output end of the welding power source so as to collect arc voltage signals. The anti-interference absorption unit comprises two common-mode absorption capacitor banks connected between a positive bus and a negative bus in series, and the middle point of the two common-mode absorption capacitor banks is electrically connected to the ground. The sampling conditioning unit comprises a sampling network and a filter capacitor, the sampling network comprises a plurality of divider resistors connected in series between positive and negative buses, the filter capacitor is connected in parallel with the output of the sampling network, and at least one stage of RC filter is formed between the filter capacitor and the divider resistors in the sampling network. The isolation conversion unit comprises an optical coupling isolator and a conversion circuit. The optical coupling isolator isolates the arc voltage sampling signal and converts the arc voltage sampling signal into a switching value signal or an analog quantity signal with various output amplitudes based on the conversion circuit.

The invention relates to the technical field of gas detection, in particular to a detection circuit based on an NTC thermistor and a heat conduction meter. The detection circuit based on the NTC thermistor comprises a main NTC thermistor which is suspended in air flow; the constant current source circuit is used for providing constant working current for the main NTC thermistor; the detection resistor is arranged between the main NTC thermistor and a ground node; the ADC sampling circuit is used for sampling analog voltages at two ends of the detection resistor into digital signals; the constant temperature adjusting circuit is used for controlling the magnitude of the current output by the constant current source circuit according to the voltage of the main NTC thermistor, so that the main NTC thermistor is kept at the target temperature; the temperature compensation circuit is used for detecting the temperature of the environment where the heat conduction measuring meter is located; and the processing unit is used for determining a detection result according to the digital signal and compensating the detection result according to the environment temperature. According to the detection circuit based on the NTC thermistor, the response speed and the measurement precision of measurement are improved.

A current signal sampling circuit is applied to a battery system, a current acquisition module acquires a battery current signal of a target battery and sends the battery current signal to a multi-stage filtering module, and then the multi-stage filtering module sequentially filters the battery current signal to respectively filter out a high-frequency interference signal, a ripple signal and a random noise signal; through sequential filtering of the multi-stage filtering module, high-frequency interference, ripple signals and random noise in the battery current signals are removed, so that after interference components in the battery current signals are gradually eliminated, digital processing is further performed on the filtered battery current signals through the data processing module; the battery current signals are converted into a series of discrete data points, so that the average value of the battery current signals can be conveniently calculated according to a set sampling period, and a more accurate current sampling value can be obtained.

The invention provides a correlated double-sampling program-controlled gain amplifier for a high-energy particle detection pixel sensor and an implementation method, and solves the technical problem that a large dynamic range and high readout precision cannot be considered at the same time during existing high-energy particle detection. The circuit comprises a correlated double-sampling circuit, a signal polarity conversion circuit, an amplification feedback circuit and a configuration automatic judgment circuit. The correlated double sampling circuit is used for performing double sampling on the output voltage of the pixel signal to obtain twice sampling voltage; the configuration automatic judgment circuit is used for selecting configurations for switching according to the voltage difference between the two sampling voltages to obtain an output signal; and the amplification feedback circuit is used for performing fixed gain voltage amplification on the output signal to obtain an amplified voltage signal. The circuit can be widely applied to the technical field of integrated circuits.

According to the pure hardware PID current control system and method based on the direct current brushless motor provided by the invention, the negative voltage interference generated by electromagnetic induction is directly filtered in the bus current signal acquisition stage through the cooperation of the current sampling module and the bus negative voltage elimination module; the problem of signal distortion caused by negative voltage in a traditional sampling circuit is eliminated, and the current effective value detection precision is improved; the PID control module constructed based on pure hardware calculates a difference value between a target voltage and an actual voltage in real time through an analog circuit, and generates a proportional, integral and differential composite compensation signal, so that a PWM modulation circuit can adjust duty ratio output in real time according to the compensation signal, and it is ensured that a bus current of a motor driver is rapidly converged to a target value; the whole scheme does not need to depend on a microcontroller and a complex software algorithm, closed-loop current control is achieved through discrete devices, and the system cost is reduced.

The invention discloses a transient enhancement circuit applied to a COT mode buck converter in the technical field of integrated circuits, and the transient enhancement circuit comprises an output voltage sampling circuit and a fully differential transconductance amplifier GM. The input end of the output voltage sampling circuit is connected with the output end of the COT mode buck converter; the output voltage sampling circuit is used for sampling an output voltage signal of the COT mode buck converter and sending the sampled voltage signal to the input end of the fully differential transconductance amplifier GM. According to the invention, the transient enhancement circuit applied to the COT mode buck converter is introduced, so that the effective improvement on the up-down rush and the recovery time in the load switching process of the buck converter is realized, and the system is continuous and the system response is optimized by dynamically changing the conduction time.

The invention discloses a frequency converter multi-stage cooperative rapid overcurrent protection circuit, and the overcurrent protection circuit cooperates with an IGBT inverter circuit, an IGBT drive circuit, a current sampling circuit and a master control MCU of a frequency converter to construct a three-stage cooperative protection system composed of hardware-stage extreme rapid protection, hardware-stage rapid protection and software-stage intelligent protection. And independent action and information interaction between the stages can be realized through circuit design. Compared with the prior art, protection blind areas are eliminated, nanosecond-microsecond level extreme protection is achieved, a multiple and high-reliability redundancy protection system is constructed, intelligent grading processing of faults is achieved, and the diagnosability of the system is enhanced.

The invention discloses a V / I source system with a wide voltage and current range. The V / I source system comprises a power amplifier U1, a parameter measuring unit, a compensating circuit, a current sampling circuit, a voltage sampling circuit, a positive power supply module, a clamping circuit and a mode selector, the positive power supply module is connected with the positive power supply end of the power amplifier U1; the parameter measuring unit is provided with a plurality of channels for respectively setting the output voltage / output current of the power amplifier U1 and the clamping voltage / clamping current of the clamping circuit and adjusting the output voltage of the positive power supply module; the compensation circuit can adapt to different capacitive loads so as to be used for adjusting the establishment time of the output voltage / output current of the power amplifier U1, and the output end of the power amplifier U1 supplies power to the DUT; the method is excellent in performance, the test quality can be improved, and the test cost is reduced.

The invention discloses a vehicle fault diagnosis circuit, a diagnosis method and a vehicle. The vehicle fault diagnosis circuit comprises an auxiliary diagnosis power supply circuit, a high-side sampling circuit, a low-side sampling circuit, a coil loop current detection circuit, a coil, a high-side switch and a low-side switch. The auxiliary diagnosis power supply circuit is connected with the coil loop current detection circuit, and the auxiliary diagnosis power supply circuit is used for controlling the on-off of an auxiliary diagnosis power supply; the coil loop current detection circuit is connected with the first end of the coil, the first end of the coil is connected with the high-side switch, and the coil loop current detection circuit is used for detecting the current of a coil loop; the high-side sampling circuit is connected with the first end of the coil, and the high-side sampling circuit is used for collecting the high-side voltage of the coil; the low-side sampling circuit is connected with the second end of the coil, the second end of the coil is connected with the low-side switch, and the low-side sampling circuit is used for collecting the low-side voltage of the coil.

The invention relates to the technical field of photovoltaic power management, and discloses a photovoltaic charging management system of a field scientific observation station, which comprises a single chip microcomputer, a battery charging and discharging management module, a switching circuit and a sampling circuit, the battery charging and discharging management module manages charging and discharging of the battery and outputs the real-time state of the battery to the single-chip microcomputer. The sampling circuit samples the discharging condition of the photovoltaic panel output circuit or the battery and transmits sampling information to the single chip microcomputer; the single-chip microcomputer comprises a monitoring module and a switching module. The monitoring module judges whether the battery or the battery charging and discharging management module works abnormally according to sampling information. And the switching module carries out automatic charging management of photovoltaic charging or battery charging on the to-be-charged equipment. By intelligently switching the power supply mode, the service life of the battery is prolonged, the stability of power supply in a low-power-consumption mode is ensured, the power supply efficiency is improved, and remote real-time data monitoring and analysis are provided.

The invention discloses a data converter based on a voltage-controlled oscillator and an implementation method of the data converter. The data converter based on the voltage-controlled oscillator comprises a sampling circuit, a multi-bit successive approximation type data converter and a multi-bit multi-order Delta-Sigma data converter. An incremental scaling type data converter based on a voltage-controlled oscillator is improved, a feed-forward compensation method suitable for the voltage-controlled oscillator is designed, the characteristics of a Delta-Sigma data converter clock are fully utilized, a feed-forward phase is firstly added into a total differential phase of the voltage-controlled oscillator and then subtracted after quantization is finished, and therefore feed-forward compensation of a phase domain is equivalently achieved. A new time sequence is not introduced, so that the implementation cost is low; the voltage-controlled oscillator is completely isolated from sensitive nodes in the circuit, so that kickback noise is avoided; according to the invention, the high-energy-efficiency data converter based on the voltage-controlled oscillator can be constructed more simply, and can be widely applied to the fields of Internet of Things, smart medical treatment and the like.

The invention discloses an ion source current control device and system, and relates to the field of circuits, the ion source current control device comprises a sampling circuit, a control circuit and a power supply circuit, the control circuit is connected with the sampling circuit, the ion source current of a neutron tube can be detected in real time, and power supply of a hot wire is controlled in real time by adopting a hardware circuit feedback mode. The current stability of the ion source is rapidly maintained, the calculation delay of a software mode is eliminated, and the control circuit can realize the adjustment of the duty ratio of the output pulse signal through the difference value between the first voltage value and the second voltage value, so as to realize the accurate control of the neutron tube hot wire power supply process. The whole control process is realized through a hardware circuit, the response speed is high, the output is stable, the stability of the output ion source current is ensured, the situations such as jitter are avoided, the application range of the neutron source is expanded, and wide popularization of the neutron source is facilitated.