51 results about "Delayed pulse" patented technology

The invention belongs to the technical field of laser pulse modulation, and particularly relates to an ultrafast laser multi-pulse sequence preparation device and method. According to the invention, ultrafast pulse laser is divided into a transmission light path and a reflection light path through a beam splitter, a spatial light modulator is utilized to perform programming control on a target pulse in the transmission light path, and amplitude and pulse width parameters can be controlled while multiple pulse strings are generated; and the light path of the reflection light path is controlled through the high-precision one-dimensional displacement table, so that the time delay of a reflection light path pulse relative to a transmission light path pulse is controlled. And after the reflected light path and the transmission path subjected to pulse shaping are combined again, a periodic pulse string sequence with controllable time delay, pulse number, pulse width parameter and pulse intensity is realized. The problem that high-precision multi-pulse dynamic programming cannot be achieved through a traditional adjusting mode is solved, and the problems that in the prior art, the number of excitation pulses and pulse width parameters cannot be controlled at the same time, and an ordered periodic pulse sequence cannot be generated are solved.

A power stage of a switching converter contains a high-side switch and a low-side switch respectively operated by corresponding drive signals. A current-sense block generates a sensed-current signal which is blanked for a first duration upon start of a longer phase of a high-side phase and a low-side phase. The sensed-current signal is un-blanked upon end of the first duration. The current-sense block generates a first pulse starting synchronous with the start of the longer phase and with pulse-width equaling the first duration. A gate driver receives the first pulse and generates a delayed pulse starting synchronous with the start of the longer phase and with pulse-width equaling a sum of the first duration and a second duration. The gate driver generates drive signal (for the switch being driven with the longer phase) with a first logic level for a duration of at least the pulse-width of the delayed pulse.

The invention discloses a single-photon streak tube laser radar based on a delay difference. The single-photon streak tube laser radar comprises a delay pulse generator, a laser, a delay difference generation module, a beam shaping system and a receiving system. Wherein the delay difference generation module comprises an optical delay path and a time delay path, and can dynamically adjust the delay difference to adapt to near-field high-precision and far-field wide-range detection requirements; the light beam shaping system shapes the laser into a one-dimensional fan-shaped light beam, so that the divergence direction of the one-dimensional fan-shaped light beam is aligned with the time deflection dimension of the streak tube detector, and the energy utilization rate and the streak image quality are improved; the receiving system rejects noise and solves a target distance by using a cross-correlation noise reduction and weighted fusion algorithm through multi-stripe redundancy processing, so that the single-photon detection efficiency and the anti-interference capability are remarkably improved. According to the invention, the detection capability of the system on a long-distance weak reflection target, the reliability in a complex environment and the three-dimensional imaging precision are effectively improved.

The invention discloses a multi-channel high-precision time sequence pulse transmitting system, and the system comprises a control panel which comprises a command receiving control unit and a time sequence generation unit; the command receiving control unit is configured to receive a control command and analyze the control command into pulse basic information; the time sequence generation unit is configured to receive the pulse basic information, generate a coarse delay pulse signal according to the pulse basic information, and generate a driving signal; the daughter board comprises a pulse precise delay unit and an optical port output unit; the pulse fine delay unit is configured to receive the driving signal, perform fine delay adjustment on the coarse delay pulse signal and generate a time pulse sequence; the optical port output unit is configured to receive the time pulse sequence and convert the time pulse sequence into an optical signal. The delay precision of the system can be effectively improved.

The invention discloses a motor control digital circuit and a driving system, and the circuit comprises a first delay time sequence module which transmits a secondary delay pulse to an acceleration and deceleration synchronization module based on a synchronization signal and delay time; the acceleration and deceleration synchronization module obtains path input after receiving the secondary delay pulse, and selects acceleration and deceleration path write-in and acceleration and deceleration position write-in sent to the acceleration and deceleration module; the stepping direction selection module receives the stepping and direction signals of the acceleration and deceleration module and the stepping and direction signals of the distance compensation module, and outputs stepping control and direction control of the motor according to the stepping direction selection signals; and the absolute position module outputs an absolute position based on stepping control and direction control of the motor. A synchronous control function and an absolute position function are added into an existing acceleration and deceleration function, so that a user can freely switch among three modes of acceleration and deceleration, synchronous acceleration and deceleration and distance compensation, an original complex algorithm is realized through a digital circuit, and the working efficiency and the integration degree are improved.

The application discloses a kind of delay pulse generation device, method and electronic equipment based on FPGA chip, field programmable gate array FPGA chip has M delay units, the device includes: clock generation module, for generating reference clock, output clock and delay clock;Pulse generation module, for generating first output pulse according to reference clock;Delay adjustment module, for first output pulse is delayed adjustment according to delay clock, obtains second output pulse, wherein, delay adjustment module includes N delay units, N is less than or equal to M positive integer;And serial conversion module, for second output pulse is converted into parallel according to reference clock and output clock, and output delay pulse sequence.The device is based on FPGA chip internal logic to realize sub-nanosecond delay adjustment, generates sub-nanosecond delay pulse sequence, and the requirement level of peripheral circuit is low, with the advantages of low cost, simple structure, easy to realize.

The invention discloses a diamond NV color center-based quantum teaching machine, which comprises a circuit part and an optical path part, and is characterized in that the circuit part comprises a computer, a microprocessor, a digital delay pulse generator, a single photon detector, a microwave source, a radio frequency source, a switch and a power amplifier; the light path part comprises a laser, an acousto-optic modulator, a diaphragm, an optical fiber collimator, a dichroscope, an objective lens, a long-pass filter, a pinhole lens combination and an optical fiber flange; the computer is communicated with the microprocessor and the digital delay pulse generator, and the microprocessor is communicated with the microwave source and the radio frequency source so as to control microwave and radio frequency output; microwave and radio frequency outputs are switched on and off through a switch, and the switch is connected with the digital delay pulse generator, the microwave source and the radio frequency source. According to the invention, a circuit part and an optical path part are combined, a basic ODMR experiment, an advanced Labian oscillation experiment, T1, T2 and T2 * experiments and a higher-level dynamic decoupling experiment are completed, and the cost of the device is far lower than that of a quantum teaching machine sold in the market at present.

The invention discloses a nuclear pulse signal trapezoidal forming method suitable for an FPGA, and the method comprises the steps: carrying out the high-speed digital sampling of an exponential decay original signal outputted by a detector, and obtaining a discrete digital detector signal vn; calculating the discrete digital detector signal vn by using a differential algorithm to obtain a differentiated pulse signal pn; delaying the pulse signal pn by using a digital delay line to form three delayed pulse signals, and performing synthesis operation on the pulse signal pn and the delayed pulse signals to obtain a synthesized pulse signal sequence sn; and performing integral operation on the synthesized pulse sequence signal to obtain a trapezoidal forming pulse yn. The nuclear pulse signal trapezoid forming method is simple in calculation and suitable for being implemented in the FPGA, few FPGA logic resources are used, and the calculation speed is high.

Waveform characteristics of pulses in a pulse train configured to cause pulsed field tissue ablation may be varied in a manner that improves electromagnetic compatibility while retaining treatment efficacy. Such waveform characteristics may include pulse-to-pulse initiation intervals, inter-pulse delays, pulse on-times, pulse widths, inter-phase delays in the case of biphasic pulses, or a combination thereof. Such waveform characteristics may be varied in a random manner. Variations of waveform characteristics may be bounded by minimum, maximum, or both minimum and maximum differences between various pulses or pulse groups, or between various pulse trains or pulse train groups, for example, to help ensure sufficient stability of treatment signal waveforms while allowing sufficient variability, for example, to improve electromagnetic compatibility.

The invention discloses a novel picosecond-level digital delay pulse generator hardware design, relates to the technical field of signal measurement, and is applied to delay and generation of digital pulses. Comprising an external trigger interface circuit which is used for converting an external signal into a level signal which can be identified by SerDes of an FPGA; the FPGA master control module is used for receiving and sending pulses; the whole hardware design integration is high, the delay accuracy reaches 10ps when the pulse delay is set to be 1us, the jitter RMS value is 10.7 ps, the minimum delay time is not larger than 30ns, and the bandwidth for processing pulse signals can reach 29GHz.

To provide a pulse width measuring circuit with which a measurement time is shortened.SOLUTION: A first programmable delay circuit 130 and a second programmable delay circuit 140 respectively delay a first pulse S1 and a second pulse S2 corresponding to an input pulse SIN and generate a first delay pulse Sd1 and a second delay pulse Sd2. A latch circuit 150 latches the first delay pulse Sd1 in response to an edge of the second delay pulse Sd2. A controller 160 continuously sweeps a delay amount τ2 of the second programmable delay circuit 140 in first processing, and detects a first delay mount τP when the output Q of the latch circuit 150 changes. In second processing, the delay amount τ2 of the second programmable delay circuit 140 is changed by a binary search and a second delay amount τn is detected when the output Q of the latch circuit 150 changes. The difference between the first delay amount τP and the second delay amount τn is made a pulse width Tp of the input pulse SIN.SELECTED DRAWING: Figure 1

The invention provides an experimental simulation system of an equivalent wind shear wind field. According to the system, pulse light signals emitted by a wind measurement laser radar are simulated through different delay optical fibers to reach atmospheric stratification at different positions, then delayed pulse light is emitted to different positions of the side face of a rotating disc rotating at a constant speed, and echo signals obtain Doppler frequency shifts of different sizes due to different radial speeds; based on this, the change of wind speed in wind shear is simulated. A required equivalent wind shear wind field can be customized by adjusting the length of the delay optical fiber, the diameter of the turntable and the incident position of light on the side surface of the turntable. The system is simple in structure and low in cost, and can provide an equivalent wind shear wind field with accurate and controllable wind speed and abundant changes.

A signal generation circuit according to one embodiment comprises: a delay signal generation unit configured so as to generate at least one delay pulse signal using an input pulse signal common to a first switching element and a second switching element; and a logic synthesis unit configured so as to generate a first control pulse signal and a second control pulse signal for the first switching element and the second switching element by performing different logic synthesis on two signal sets of a plurality of signal sets specified by the at least one delay pulse signal and the input pulse signal. The first control pulse signal is different from the input pulse signal, and the second control pulse signal is different from the input pulse signal and the first control pulse signal.

The present invention relates to the field of spatial fault tolerance technology, and in particular to a reliability design method for a multi-dimensional COTS device intelligent computing system. The method includes: setting a corresponding fault detection and recovery module inside the intelligent computing module and each external interface module, and setting a long-delay system-level watchdog connected to the intelligent computing module and the external interface module respectively; the long-delay system-level watchdog includes a latching arbitration circuit and a multi-channel long-delay pulse generator, the latching arbitration circuit is used to receive the clear signal sent by the intelligent computing module and N external interface modules, and clear the timing of each long-delay pulse generator after latching and arbitration. If the timing exceeds the first set delay, a first reset signal is output to reset and restart the corresponding intelligent computing module or external interface module. This solution adopts a two-level reliability design, which can save space and computing resources compared to the backup design.

The invention discloses a delay circuit of a pulse sequence, an integrated circuit, an interaction system, a method and equipment, and relates to the field of signal processing. The delay circuit comprises an edge detection module used for receiving an initial pulse sequence, generating an enable signal according to a rising edge and a falling edge of a pulse signal in the initial pulse sequence, and inputting a first numerical value to an FIFO cache module based on the enable signal; the cycle counter is used for cyclically outputting a count value; the FIFO cache module is used for receiving the first numerical value from the data writing port and inputting the first numerical value to the numerical value comparison module after the first numerical value is moved to the data reading port; the numerical value comparison module is used for comparing the first numerical value with a real-time counting value of the cycle counter, and generating a trigger signal when the two values are equal; and the pulse generation module is used for generating a pulse signal according to the trigger signal to obtain a delayed pulse sequence. As a result, the delay circuit can complete the overall delay of the pulse sequence.

The application discloses a signal sampling method, device and equipment of digital PET, and a storage medium. The signal sampling method of the application comprises the following steps: performing delay processing on pulse signals input to multiple channels, and obtaining multiple delay pulse signals; switching the multiple channels based on the multiple delay pulse signals, and obtaining comparison signals; and performing time-to-digital conversion processing on the comparison signals to extract time information. According to the scheme of the embodiment of the application, the multiplexing of time-to-digital converters among multiple channels can be realized in the FPGA, information loss is not caused, the resource usage of the FPGA is reduced, and the time measurement precision and system integration are improved.

The present inventive concept provides a capacitance sensor array chip with programmable fusion pixels comprising: a programmable module for generating a choosing signal according to a first clock signal; a delay pulse module for generating a third clock signal according to a second clock signal and a sensing pulse signal; and multiple electrode array modules comprising a charging unit for generating a charging signal according to the sensing pulse signal; M×N electrode pixel units forming an array, wherein the electrode arrays chooses a certain pattern of the electrode units according to the choosing signal in orders and the certain pattern of the electrode units in the electrode array generates a sampling signal according to the charging signal; and a sampling unit for generating a sensing output signal according to the sampling signal and the third clock signal.

The invention relates to an inter-pulse double-path delay accurate modulation interference method and device based on SAR-GMTI, belongs to the technical field of radar signal processing interference, and solves the problem that in the prior art, false targets with high-degree-of-freedom position distribution cannot be generated in an interference weakening area. The method comprises the following specific steps: a ground jammer receives a signal transmitted by an aerial radar to obtain a received signal; the ground jammer performs interference enhancement region complementary modulation on the received signal to obtain a first interference signal; wherein the first interference signal is formed by superposing a path of echo signal in a direct forwarding form and a path of echo signal forwarded by delaying n pulses; doppler modulation is carried out on the first interference signal to compensate position lag of delay pulse forwarding, and a second interference signal is obtained; and two-dimensional frequency modulation is carried out on the second interference signal, and an obtained final interference signal is transmitted back to the aerial radar, so that the multichannel SAR-GMTI deception interference with high degree of freedom not being canceled is realized.

The invention discloses a calibration method for impulse radar transmitted pulse jitter, and the method comprises the steps: capturing a transmitted pulse string sample of an impulse radar, generating a reference pulse waveform, and constructing a delay pulse sample set through random numbers; according to the reference pulse waveform and the delay pulse sample set, obtaining a measurement result by using a delay measurement mode based on multiple rules; according to the delay pulse sample set and the measurement result, constructing a delay measurement data set, carrying out fusion mapping relation training learning, and generating a fusion mapping relation function; a direct wave of the impulse radar is actually measured, and a measurement result is obtained through a delay measurement mode based on multiple rules; and according to the measurement result, obtaining a fusion value of the measurement result by using a fusion mapping relation function, and using the fusion value to delay the correction parameter.

The invention discloses a testing device and a testing method for a powder fuel combustion transient spectrum, and relates to the technical field of powder fuel spectrum testing. The testing device comprises a shock tube system, a multi-channel oscilloscope, a spectrometer, an I CCD detector, a pressure sensor and a multi-channel digital delay pulse generator; an optical signal generated by powder fuel high-temperature self-ignition is transmitted to an I CCD detector, the time distribution of the measured optical signal and the time distribution of the I CCD detector meet a one-to-one corresponding optical system, and transient spectral information of powder fuel high-temperature self-ignition luminescence at different time is obtained. The device can realize nanosecond-level time resolution, is suitable for a rapidly changing combustion process, can obtain high-quality transient spectrum data by combining a high-resolution spectrometer and an I CCD detector, realizes measurement of a high-resolution transient spectrum of high-temperature self-ignition combustion of the powder fuel, and can be widely applied to transient spectrum measurement of the powder fuel.

The present invention is applicable to the field of analog-to-digital conversion and provides a high-speed two-step time-domain analog-to-digital converter, comprising: a common-mode voltage conversion unit for converting a differential voltage signal into first and second time pulse signals; a conversion and selection unit for sequentially delaying and encoding the first and second time pulse signals to obtain a first code, and selecting and outputting a first signal and a second signal from the first and second time pulse signals and the multiple delayed pulse signals obtained by the delay processing; a one-step multi-bit successive approximation analog-to-digital conversion unit for continuously quantizing and encoding the first and second signals, outputting a second code, and extending or shortening the transmission time of the first and / or second signals based on the second code; and a quantization coding unit for obtaining a target quantization code using the first and second codes. The solution provided by the present invention can effectively shorten quantization time, improve quantization efficiency, and improve quantization accuracy.

A method, apparatus and system for processing a wafer in a plasma chamber system, which includes at least a plasma generating element and a biasing electrode, include generating a plasma in the plasma chamber system by applying a source RF source power to the plasma generating element for a first period of time of a pulse period of the RF source power, after the expiration of the first period of time, removing the source RF source power, after a delay after the removal of the RF source power, applying an RF bias signal to the biasing electrode for a second period of time to bias the generated plasma towards the wafer, and after the expiration of the second period of time, removing the RF bias signal from the biasing electrode before a next pulse period of the RF source power. The generated plasma biased toward the wafer is used to process the wafer.

The application provides a time coding compressed sensing imaging method and device based on FPGA and electronic equipment, the method is applied to the technical field of photoelectric detection and computational imaging, and the method comprises the steps of: calibrating an FPGA delay unit based on a reference clock, constructing a delay lookup table and writing a time coding sequence of random coding and a push-scan mode. In response to a synchronization signal, coarse and fine delay tap values are analyzed, a reference pulse is generated and is synchronized to the reference clock, a delay pulse is generated through fine delay, three alignment timing control signals are generated, and the excitation gate and exposure signals are cooperatively controlled. Discrete integral observation values are collected in an exposure window, a continuous observation operator is constructed in combination with the delay lookup table, a target function is constructed based on physical priori, and the target function is iteratively solved to obtain a high signal-to-noise ratio, a transient response curve and physical parameters. The method can solve the problems of slow sampling speed and lack of software flexibility due to dependence on modulation devices in traditional hyperspectral imaging technology.

Provided is a pulse generation circuit that receives a clock signal and outputs a delayed pulse signal, including: a first delay-locked loop circuit that receives the clock signal and generates a first delay signal obtained by delaying the clock signal; a second delay-locked loop circuit that generates a second delay signal with reference to the first delay signal; and an output circuit that outputs the delayed pulse signal according to the first delay signal and the second delay signal. The second delay-locked loop circuit may have: a second charge pump that outputs a current according to the clock signal and the delayed pulse signal; and a second delay circuit that outputs the second delay signal obtained by delaying the clock signal according to a current output by the second charge pump.

An optical pulse generator arranged to generate an initial sequence of optical pulses having an initial inter-pulse period; and an optical pulse burst formation apparatus including: an interleaving stage to receive an initial sequence of optical pulses having an initial inter-pulse period, including: an optical splitter to power split received optical pulses, thereby generating a first and second replica sequences of optical pulses; a first optical arm to receive the first replica sequence, having a first optical path length; and a second optical arm to receive the second replica sequence, having a second optical path length, different to the first optical path length by a path length difference; and an optical combiner arranged to combine the first replica sequence of pulses and the second replica sequence of delayed pulses to form an output sequence of optical pulse bursts.

The utility model relates to the technical field of laser spectrum, in particular to an underwater rare earth element detection device based on a solid enhanced PRLIBS technology, which comprises a signal excitation unit, a signal collection unit, a sample fixing unit, a delay pulse generator and a computer, a sample to be detected is fixedly arranged on the sample fixing unit; the signal excitation unit is relatively horizontal to the sample fixing unit to excite the sample to generate plasma; the signal collection unit is arranged in parallel to the signal excitation unit, receives the plasma generated by the sample reflected by the signal excitation unit, and sends computer spectrum data for processing; the delay pulse generator is connected with the signal excitation unit and the signal collection unit to control the delay between the signal excitation unit and the signal collection unit. According to the utility model, the LIBS detection with high signal-to-background ratio can be economically and efficiently realized through a simple experimental device, such as a polarization prism and a reinforced material substrate, and weak signals which cannot be detected by the traditional LIBS can be detected.

This invention discloses a multi-delay mode delay pulse generation circuit, including a signal input unit, a signal processing unit, a pulse generation unit, and a pulse output unit. In the signal input unit, a logic processing circuit receives a level combination signal and a control pulse signal, and multiple signal output circuits are configured according to their combination. Each signal output circuit is connected to a delay selection circuit. In each delay selection circuit, a delay control signal is used to control the state of the delay selection switch, so that the signal delay processing circuit processes the signal output from the signal output circuit into a pulse signal DLY with a corresponding delay, which is then sent to the pulse generation unit. The pulse generation unit generates a detonation pulse based on the pulse signals DLY output from the multiple delay selection circuits. The pulse output unit outputs the detonation pulse to the detonation driving device. This invention enables the selection and setting of the delay of the driving pulse to provide pulse signals with different delays as needed, achieving precise control of the load switching time.

The present disclosure relates to a pipeline clock driving circuit, a computing chip, a computing power board and a computing device. A pipeline clock driving circuit is disclosed for providing a pulse clock signal for a pipeline, comprising: a plurality of stages of clock driving circuits, each stage for providing a pulse clock signal for a corresponding operation stage of the pipeline; a clock source coupled to an input of a first stage of the clock driving circuits, each stage of the clock driving circuits comprising: a flip-flop coupled to an input of the stage of the clock driving circuits; a delay module comprising a first delay submodule for delaying a pulse signal output by the flip-flop and feeding back the delayed pulse signal to the flip-flop as a feedback pulse signal; and a combinational logic module for performing a combinational logic operation on the pulse signal and the feedback pulse signal to generate the pulse clock signal for providing to the corresponding operation stage, wherein the delay module further comprises a second delay submodule for delaying the pulse signal and outputting the delayed pulse signal to a next stage of the clock driving circuits.

The invention relates to an electronic device. The electronic device comprises a display unit, a display driving circuit and a circuit assembly, the display driving circuit is coupled to the display unit, the display driving circuit can drive the display unit to display a picture in a plurality of update rate modes, and the plurality of update rate modes comprise a first update rate and a second update rate. The circuit assembly is arranged under a display area of the display unit, the circuit assembly is coupled to the display driving circuit and receives a dynamic updating signal generated by the display driving circuit, and the dynamic updating signal comprises a plurality of starting pulse waves and a plurality of delay pulse waves. Therefore, the problem that in the prior art, when the update rate of the screen is changed, mutual interference between the display pixels and the under-screen circuit assembly cannot be really avoided can be solved.

In a first signal processing stage of a photon-counting x-ray detector, each pixel element has a comparator and a monoflop unit with a delay unit. The comparator is configured to compare an electrical signal with a signal threshold value and provide a digital pixel signal to the monoflop unit. The monoflop unit is configured to provide a pulse signal with a defined pulse length based on the digital pixel signal. In a second signal processing stage, an output of the first signal processing stage is coupled, for signaling purposes, to a delay unit, which is configured to delay the pulse signal to obtain an adjusted pulse signal. A counting element is configured to count a counting signal based on the adjusted pulse signal.