13results about How to "Improve transient response speed" patented technology

The invention is suitable for the technical field of voltage converters, and provides a transient response control circuit and a voltage converter. The transient response control circuit comprises a first comparison module, a second comparison module, a logic module and a voltage regulation module, the first comparison module is electrically connected with the second comparison module, the logic module and the voltage regulation module, and the second comparison module is electrically connected with the voltage regulation module. The first comparison module, the second comparison module and the voltage regulation module are used for being electrically connected with the loop compensation circuit, and the logic module is used for being electrically connected with the signal generation circuit and the trigger circuit. When the load is suddenly changed to cause the change of the output voltage, the transient response control circuit is additionally arranged, so that the output voltage can be quickly adjusted, and the output voltage can be quickly recovered to a set value. The voltage converter solves the problems that an existing voltage converter is large in variation amplitude of output voltage and low in transient response speed when the load suddenly changes, and the transient response speed of the voltage converter is increased.

The invention discloses a low-dropout linear voltage stabilizing circuit. The low-dropout linear voltage stabilizing circuit comprises a power tube, a control module and a transient response module, the first end of the power tube is connected with power voltage, and the second end of the power tube is used for generating output voltage. The control module is used for controlling the output voltage to carry out voltage following on the input voltage and driving the power tube. The transient response module is used for generating a transient response signal based on the transient change of the output voltage. The control module also adjusts the driving capability of the power tube and / or adjusts the output voltage based on the transient response signal. According to the low-dropout linear voltage stabilizing circuit, the transient response speed is further improved through the extremely simple circuit extension design, meanwhile, the loop analysis difficulty is simplified, and the hardware cost is reduced. And the control module adopts a folded voltage follower architecture, naturally has a speed advantage, and is matched with the transient response module to further accelerate the driving of the power tube so as to realize quick response to the output voltage.

The invention discloses a PMOS (P-channel Metal Oxide Semiconductor) driving stage voltage stabilizing circuit with high transient response and no off-chip capacitor, which belongs to the field of voltage stabilizing circuits and comprises a reference voltage generating unit, an auxiliary pull-up unit, a main adjusting unit and an auxiliary pull-down unit. The PMOS driving stage voltage stabilizing circuit without the off-chip capacitor is realized by adopting the high-voltage MOS device, so that the chip area can be reduced, the transient response speed of the circuit is improved, and stable voltage is provided for the driving stage circuit.

The application discloses a switching converter, a transient enhancement circuit thereof, a chip and electronic equipment. The switching converter comprises an error amplifier and a compensation network. The error amplifier is used for amplifying a feedback voltage of the switching converter and a reference voltage. The compensation network is used for converting a current amplified by the error amplifier into a voltage signal to control a switching duty cycle of a power switch tube. The transient enhancement circuit comprises a comparison module, a transconductance amplifier and a current control module. The comparison module is used for comparing the feedback voltage with a first threshold voltage and generating a mode control signal according to a comparison result. The transconductance amplifier is controlled by the mode control signal and is used for differentially transconducting and amplifying the feedback voltage and a second threshold voltage to generate a compensation current. The current control module is used for providing the compensation current to the compensation network according to a state of the mode control signal and a direction of the compensation current to improve a response speed of the compensation network.

The invention discloses an annular grating heterojunction solar blind detector and a preparation method thereof. The detector comprises a back electrode, a diamond layer, a Ga2O3 layer, an annular grating and an interdigital electrode. The diamond layer is arranged at the top end of the back electrode, and the Ga2O3 layer is arranged at the top end of the diamond layer; the annular grating is arranged at the top end of the Ga2O3 layer; the interdigital electrode is arranged at the central position of the top end of the annular grating; incident light is utilized more efficiently, the light intensity threshold value of detectable light is lower, the light absorption efficiency is improved, and the weak light detection capacity is improved.

The invention discloses a semiconductor device and a preparation method thereof, and belongs to the technical field of semiconductors. The semiconductor device comprises a semiconductor body, a first electrode, a second electrode, a first ferroelectric material layer and / or a second ferroelectric material layer. The first electrode is arranged on the first surface of the semiconductor body, the second electrode is arranged on the second surface of the semiconductor body, the first ferroelectric material layer is arranged on the side, away from the semiconductor body, of the first electrode, and / or the second ferroelectric material layer is arranged on the side, away from the semiconductor body, of the second electrode. According to the technical scheme, the device structure is optimized, so that the switching speed of the device is improved, and power consumption is reduced.

The present invention discloses a wide input and output range amplifier circuit. The circuit is powered by a 1.5V power supply. When working, the input voltage range is 0.2V-1.2V, and it has a high load driving capability. The circuit of the present invention includes a differential amplifier, an output stage, and a discharge circuit; the differential amplifier is composed of two groups of input pairs of tubes with a zero threshold and a normal threshold. According to different input voltages, the input pair of tubes of the amplifier is selected to ensure the gain within the input voltage range, and the output voltage OUTP is connected to the differential amplifier input terminal IN_N, and the difference between IN_P and OUP is amplified so that the OUTP voltage output reaches the target potential. The output stage is a common source amplifier circuit, the purpose of which is to enhance the driving capability of the output signal of the differential amplifier, and it can drive a capacitive load of the order of 1 nanofarad, and it has a strong voltage pull-up capability and output range. The discharge circuit can quickly discharge the circuit load and quickly establish the output voltage OUTP.

The invention provides a foldback current-limiting protection circuit using bonding wire sampling, and relates to the technical field of current-limiting protection, and the foldback current-limiting protection circuit is characterized in that a first input end of a first-stage amplification circuit inputs a reference voltage, the first-stage amplification circuit is connected with a feedback circuit, and the first-stage amplification circuit is connected with a second-stage amplification circuit; the power pole amplifying circuit is connected with the second-stage amplifying circuit; the current-limiting output MOS tube is connected with the second-stage amplification circuit, and a source electrode is connected with power supply voltage; the short circuit current limiting circuit is connected with the constant current source, the current comparison MOS tube and the bias voltage MOS tube and receives a short circuit control logic signal, the bias voltage MOS tube is connected with the current comparison MOS tube, the current comparison MOS tube is connected with the current limiting output MOS tube, and the bias voltage MOS tube is connected with the feedback circuit; the bonding wire sampling resistor is connected with the current comparison MOS tube and receives sampling signals. The beneficial effects are that the transient response speed is improved, the stability is ensured, the structure is simple, and the chip cost is reduced.

The invention discloses a semiconductor chip capable of reducing low-clamping transient voltage, which relates to the technical field of semiconductor chips and comprises back metal, a substrate layer is arranged at the upper end of the back metal, a first P + isolation region and a second P + isolation region are arranged on two sides of the upper end of the substrate layer respectively, and an epitaxial layer is arranged in the middle of the upper end of the substrate layer. The two ends of the epitaxial layer are communicated with the first P + isolation region and the second P + isolation region respectively, a first doping region, a third P + isolation region, a second doping region, a third doping region and a fourth doping region are arranged in the epitaxial layer, and a first heat dissipation layer and a second heat dissipation layer are arranged in the epitaxial layer. According to the semiconductor chip capable of reducing the low-clamping transient voltage, the electromagnetic intensity is slowed down in time, so that the transient response speed of a transient voltage suppressor is increased, the semiconductor chip can perform continuous heat dissipation through heat dissipation coatings with different densities, and the current control accuracy of the semiconductor chip is improved.

The application discloses a self-disturbance rejection control method for an electrically excited synchronous motor based on joint simulation, which comprises the following steps: firstly, a finite element model of the motor is designed in Maxwell; then, an engineering is created and a motor driving circuit is built in Simplorer; a motor control circuit model is built in Matlab / Simulink; finally, the modules are connected to realize joint simulation of motor control. In Simulink, a linear self-disturbance rejection control theory is applied to design a current double closed loop controller for the motor, and a model auxiliary extended state observer is designed according to motor related parameters, so that the observation and elimination of disturbance in motor operation are realized. Compared with the prior art, the motor body, the driving circuit and the control system design are combined, the electrical and electromagnetic performance of the motor driving system is comprehensively considered through joint simulation, the complex control algorithm is combined with the motor parameters for simulation verification, and the accuracy and timeliness of the motor control system are improved, and the motor control system is closer to the actual situation.

This invention provides a fully digital wireless time and frequency synchronization system and method, applicable to the fields of positioning, navigation, and timing technology. The system includes: a signal transceiver module for bidirectional time transmission with a master node via a wireless channel and recording transmission and reception timestamps; a time measurement module for calculating time and frequency deviations based on the timestamps and generating a digital frequency control word; a microelectromechanical system (MEMS) oscillator module for receiving the frequency control word via a digital interface and adjusting the output frequency in real time; and a synchronizer module for generating a second pulse signal based on the adjusted frequency. The adjusted frequency is fed back to the signal transceiver module as a local clock driver, forming a closed-loop frequency control. This invention deeply integrates high-precision time measurement with a MEMS resonator, achieving fully digital closed-loop control. While maintaining advantages such as small size, low power consumption, and vibration resistance, it significantly improves the transient response speed and long-term stability of frequency synchronization and supports rapid customization of special frequency points.

The invention discloses a four-phase different-name end coupling magnetic integrated inductor which comprises an upper cover plate, a lower cover plate, four magnetic columns and four windings. The upper cover plate and the lower cover plate are the same in shape, and the four magnetic columns are the same in shape. The four magnetic columns are transversely and uniformly distributed at equal intervals around a vertical connecting line of the central point of the upper cover plate and the central point of the lower cover plate; the upper cover plate covers the upper surfaces of the four magnetic columns, and the lower cover plate covers the lower surfaces of the four magnetic columns; a partition air gap is further included; the four windings have the same structure and are respectively wound on the four magnetic columns to form a magnetically coupled four-phase inductor; after current excitation is applied to the four windings, the directions of magnetic fluxes generated in the four magnetic columns are the same. According to the invention, through coupling of the synonym ends of the four-phase windings, the directions of magnetic fluxes generated by four-phase inductive current in the magnetic core upper cover plate and the magnetic core lower cover plate are the same, so that the magnetic fluxes can be reduced to a certain extent. Inductive current ripples can be reduced, winding loss is reduced, and the current sharing degree and the rated value of four-phase inductive current can be improved.

The invention discloses a flux linkage suppression-based low-voltage ride-through control method, device and system for a grid-forming doubly-fed motor, and a storage medium, and belongs to the technical field of power generation, power transformation or power distribution. The method comprises the following steps: firstly, locking a network construction control unit and obtaining an internal potential phase based on a virtual synchronous machine principle when a voltage drop occurs in a power grid; the proportionality coefficient of the excitation flux linkage ring is dynamically adjusted, so that the system damping is maximized, and the attenuation of the transient component of the stator flux linkage is accelerated; on the basis, a rotor current instruction is generated in real time according to voltage and current capacity limitation of a rotor-side converter, and a modulation signal is output to drive the converter in combination with a feed-forward compensation strategy and a resonance controller. According to the method, rotor overcurrent and overvoltage during a fault period can be effectively suppressed without adding any hardware circuit, the attenuation speed of a transient flux linkage is remarkably improved, meanwhile, the reactive power supporting capacity of a unit to a power grid is enhanced, and high-performance low-voltage ride-through of the grid-forming type doubly-fed motor is achieved.