220 results about "Delayed pulse" patented technology

According to an embodiment, a touch-sensitive display device includes a display panel including data lines, gate lines crossing the data lines, and a pixel array including pixels arranged in a matrix form; a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed at crossings of the Tx lines and the Rx lines; a display driving circuit configured to supply video data voltages to the pixels of the display panel; and a touch screen driving circuit configured to sequentially supply at least one delayed pulse to each of the Tx lines, and sense an output signal of each of the touch sensors through the Rx lines, wherein an edge of each of the at least one delayed pulse is present in a horizontal blank period.

A data strobe signal generator according to the present invention includes a control unit, a pulse delay unit, a clock generator, and a data strobe output unit. The control unit generates a CAS latency signal and a preamble signal. The pulse delay unit delays a pulse signal for predetermined time and outputs a delayed pulse signal. The clock generator outputs a control clock signal. The data strobe output unit outputs a data strobe signal. The data strobe signal generator and the semiconductor memory device having the same according to the present invention generate a data strobe signal based on an adjustable preamble value, thereby ensuring the stabilized data output operation of a high-speed memory device.

An A / D converter for driving a plurality of delay units forming a pulse delay circuit by an analog input signal Vin and digitalizing the number of delay units through which a pulse signal passes in the pulse delay circuit at predetermined timings, provided with a plurality of pulse position digitalizing units used for A / D conversion and inputting delay pulses from the delay units of the pulse delay circuit to the pulse position digitalizing units through an inverter group comprised of inverters with different inversion levels (switching threshold level) by different input timings. The digital data obtained by the pulse position digitalizing units are added by an adder.

There is provided a distance measuring apparatus having system flexibility by varying a distance measuring range and a distance measuring resolution according to an environment and circumstance. The apparatus includes a reference pulse generator and a delay pulse generator capable of controlling frequencies of a reference pulse and a delay pulse and duty ratios of the reference pulse and the delay pulse. The reference pulse generator and the delay pulse generator include a programmable clock generation unit generating a clock of a frequency determined by a frequency control signal and a duty ratio control unit controlling a duty ratio of the clock generated by the programmable clock generation unit.

The invention belongs to the technical field of fiber lasers, is used for solving the technical problems of high flatness, wide spectral region and high output average power which are needed by a super-continuum spectrum light source, and provides a super-continuum spectrum light source based on a dual-band seed source Er-Yb co-doped optical fiber amplifier. The super-continuum spectrum light source based on the dual-band seed source Er-Yb co-doped optical fiber amplifier comprises a 1550 nm wave band pulse optical fiber laser, a 1064 nm wave band pulse optical fiber laser, a multichannel digital delay pulse generator, a wavelength division multiplexer, a pump combiner, a semiconductor laser pumping source and Er-Yb co-doped optical fibers. Due to the fact that 1550 nm wave band pulse lasers and 1064 nm waveband pulse lasers are amplified simultaneously in the Er-Yb co-doped optical fiber amplifier, the expansion of the super-continuum spectrum towards long wavelengths is facilitated, and the flatness and the conversion efficiency are improved; and the Er-Yb co-doped optical fibers of large mode field areas are utilized as gain mediums and non-linear mediums to achieve the output of super-continuum spectrums, and the realization of the high average super-continuum spectrum light source is further facilitated.

A dual-channel electrostatic discharge protecting circuit based on RC-triggering is composed of a delay generation unit, a substrate trigger unit, a low-voltage grid trigger unit and an electrostaticdischarger. When positive electrostatic discharge occurs on a power supply, the delay generation unit in the protecting circuit can generate a delay pulse to respectively drive the substrate trigger unit and the low-voltage grid trigger unit, and the combined action of the substrate trigger unit and the low-voltage grid trigger unit reduces the threshold voltage of the electrostatic discharger, improves the opening speed of the electrostatic discharger and enhances the positive discharge performance of the electrostatic discharger; when negative electrostatic discharge occurs on a power line,a parasitic inverse diode between a source electrode in short circuit with the electrostatic discharger and a substrate and a drain electrode is mainly used for electric discharge to realize better negative static voltage protection; and the design circuit in the invention keeps closed in the case of normal power-on of the power supply and normal operation of a chip.

Object To provide a highly accurate and stable pulse width modulation (PWM) pulse signal generation device compatible with high resolution images without increasing a basic frequency of an external oscillation circuit.Solving Means A PWM pulse signal generation device includes a first PLL control circuit 410, a ring oscillator 420 in which a plurality of basic delay elements are serially connected, and a delayed pulse generation circuit constituted by a delay ratio adjusting circuit 330 and a delay circuit 350. The delay circuit 350 is formed by setting one adjustment delay element having a delay ratio R that is adjusted by the delay ratio adjusting circuit 330 at a first stage and a plurality of serially connecting basic delay elements. An output pulse signal from each delay element of the ring oscillator 420 and an output pulse signal from each delay element of the delay circuit 350 having a delay amount corresponding to the delay ratio are superimposed to perform pulse width modulation, whereby output pulses having various pulse widths can be generated.

A pulse signal delay circuit comprises: a first pulse edge delay circuit for generating a first delay timing signal for sequentially outputting a first edge detection delay timing gained by detecting the rising edge of an input pulse signal and delaying the detection timing by a constant delay time a predetermined number of times; a second pulse edge delay circuit for generating a second delay timing signal for sequentially outputting a second edge detection delay timing gained by detecting the falling edge of the input pulse signal and delaying the detection timing by the delay time the number of times; and a delay pulse signal generating circuit for generating and outputting delay pulse signals rising and falling according to the first and second edge detection delay timings, respectively, from the first and second delay timing signals, the first and second edge detection delay timings delayed the same number of times.

A radar device is described having means (10) for generating a carrier signal having a carrier frequency fT, means (12, 13, 15, 17) for generating pulses having a pulse repetition rate fPW, means (16) for splitting the carrier signal between a transmission branch and a reception branch, means (18, 19, 21, 27, 29) for delaying the pulses, means (24) for mixing the carrier signal in the reception branch with a reception signal and means (26) for integrating the mixed signal, whereby means (20, 23) for modulating the carrier signal in the transmission branch with the delayed pulses are provided and means for altering the delay in the pulses according to a predetermined code are provided. A method of suppressing interference with the functioning of a radar device is also described.

The present invention is a high-voltage generation circuit configured to sequentially activate a plurality of high-voltage pump circuits to precisely pump a level of high voltage. In one embodiment, the high-voltage generation circuit includes a high-voltage level detection unit for outputting a high-voltage detected signal, a high-voltage pump control unit for generating a control signal responsive to a detected signal, an oscillator for generating a pulse signal for driving a plurality of high-voltage pumps, a sequential delay unit for sequentially delaying the pulse signal from the oscillator, and a plurality of high-voltage pumps for pumping the high voltage based on a delayed pulse signal and the control signal.

The invention discloses a micro-domain laser probe component analyzer based on optical fiber waveguide. The analyzer comprises a Nd:YAG laser, a wavelength-tunable laser, a CCD monitoring camera, a computer, a grating spectrometer, a focusing objective lens, a displacement platform, a digital delay pulse generator, and an enhanced CCD. The focusing lens is a reflective focusing lens. The Nd:YAG laser and the wavelength-tunable laser both adopt optical fiber waveguide for carrying out laser pulse transmission; laser pulse is collimated by using an optical fiber collimator and expanded by a beam expander, and enters the focusing objective lens. Laser pulse transmitted by the Nd:YAG laser burns a surface micro-domain on a sample to be analyzed, such that plasma is formed; the laser pulse transmitted by the wavelength-tunable laser is applied on the plasma, such that resonance excitation is caused; one end of the optical fiber is used for collecting spectral signal transmitted by the plasma, and the other end is connected with an optical fiber interface of the grating spectrometer. According to the invention, precise qualitative and quantitative analysis of laser probe upon substance micro-domain components can be realized.

The invention relates to a method for generating two delayed pulses, in particular in terahertz spectroscopy and / or in pump-probe experiments, with the following method steps:generating a pulsed beam using a beam source, in particular a pulsed laser;dividing the pulsed beam, wherein a first partial beam contains a first pulse and a second partial beam contains a second pulse;directing the two pulses onto a respective target area, wherein the first pulse directly reaches a first target area and the second pulse reaches a second target area after covering a delay path, and wherein the two target areas may coincide;using the two pulses, in particular for a measuring method;wherein a time delay of the two pulses in the respective target area is adjustable by means of a pulse repetition rate of the pulsed beam.

The invention discloses a synchronous measuring device and synchronous measuring method of an arc and contact moving process based on laser imaging. The device comprises a short-circuit current generating device, a CW-laser illuminator, a high-speed photographic device, an electric parameter measuring device and a digital delay pulse generator, wherein the digital delay pulse generator is used for simultaneously triggering the short-circuit current generating device, the high-speed photographic device and the electric parameter measuring device, the short-circuit current generating device is used for outputting short-circuit current to generate an arc in a breaker to be tested; the CW-laser illuminator is utilized to transmit continuous laser as a background light source, and the morphological evolution of the electric arc in the breaker to be tested, the motion of the contact and the interaction of the electric arc and the contactor can be simultaneously shot by the high-speed photographic device in a strong electric arc illumination condition. According to the synchronous measuring device provided by the invention, the air on-off process can be deeply and completely understood, and the directly beneficial scientific basis can be provided for electric arc evolution, electric arc evolution, a relationship between clearance between open contacts and the like.

A power factor correction circuit steps up and power-factor-corrects a rectified voltage, which has been rectified from an AC input voltage of an AC power source Vin, through an ON / OFF operation of a switching element Q1 and supplies a stepped-up output voltage to a DC-DC converter that is driven with a first pulse signal. The power factor correction circuit includes a delay circuit to receive the first pulse signal whose pulse width corresponds to an output voltage of the DC-DC converter, generate, in response to an ON pulse of the first pulse signal, a delay pulse signal whose pulse width corresponds to the rectified voltage, and synthesize the first pulse signal and the delay pulse signal into a second pulse signal. The power factor correction circuit also includes a driver to drive the switching element according to the second pulse signal.

The invention provides an optical fiber sensing system. The system comprises a laser which is used for transmitting continuous light of a designated frequency, an acousto-optic modulator which is usedfor receiving the continuous light and modulating the continuous light into a differential delay pulse pair, a circulator which is used for receiving the differential delay pulse pair and outputtingthe differential delay pulse pair to a sensor, the sensor which is used for processing the differential delay pulses output by the circulator to form a light pulse and sending the light pulse to a detector through the circulator, the detector which is used for receiving the light pulse to form an interference light signal, converting the interference light signal into an interference electrical signal and sending the interference electrical signal to an analog-digital converter, the analog-digital converter which is used for converting the interference electrical signal into an interference digital signal and sending the interference digital signal to an FPGA module, and the FPGA module which is used for controlling a driver to generate radio frequency pulse signals of different frequencies, and carrying out phase algorithm processing according to the interference digital signal to acquire phase information. According to the invention, the acousto-optic modulator is used, which effectively reduces the cost; and a front-end MZ interferometer is eliminated, which can effectively eliminate the interference of the environmental noise.

Techniques test a clock signal by comparing different portions of that clock signal to each other. Such techniques enable the detection of a clock signal having anomalies such as missing pulses or occasional delayed pulses. In one arrangement, a data communications device has a clock signal generator, processing circuitry and a test circuit, both of which are coupled to the clock signal generator. The clock signal generator provides a clock signal. The processing circuitry uses the clock signal to receive data elements on a set of input ports, and to transmit the data elements on a set of output ports. The test circuit includes a node that receives the clock signal, a comparison circuit that provides a comparison signal based on a comparison between the clock signal and a delayed copy of the clock signal, and an output circuit that provides a result signal based on the comparison signal.

The present invention discloses a programmable picosecond level delay pulse generation device and method. The coarse delay generation module of the device runs in a system clock, counts the system clock, and generates an initial pulse signal with the pulse width of a system clock cycle and a coarse delay pulse signal. A fine delay generation module is a signal delay chain with multiple tap inputs and corresponding tap selection inputs. A coarse delay pulse is sent to each tap input of the signal delay chain through a global clock driving network module. A fine delay programming module generates a corresponding one-hot to each tap selection input of the signal delay chain according to needed fine delay, thus controls the coarse delay pulse to pass each fine delay unit in the signal delay chain or not, and outputs an end pulse at the tail end of the signal delay chain. According to the device and the method, through the control of the fine delay generation module by the coarse delay generation module, the ten-picosecond accurate delay of the coarse delay pulse signal can be realized through the signal delay chain, and a delay dynamic range can be a few seconds.

A transmitter for transmitting data as a pulsed ultrawide band signal comprises a serial-to-parallel converter (54) for converting the signal to be transmitted to a parallel sequence, a modulator (64) to convert the parallel sequence to a parallel stream of impulse trains. A delay unit (60) delays the parallel streams of impulse trains by different time intervals within the same pulse repetition period. The delayed pulse streams are combined so that the pulses in the streams occur within the pulse repetition period of a single pulse. An antenna (52) is used to transmit the combined signal. A receiver comprises an antenna (72) for receiving a transmitted pulsed ultrawide band signal having two or more interleaved pulse trains with equal pulse repetition periods, the pulse repetition period being greater than the pulse spacing in the interleaved signal. A matched filter filters the received signal, the filter being matched to the pulse shape of the received signal. A low-pass filter (74) is coupled to the matched filter and an analogue-to-digital converter (76) is coupled thereto. A serial-to-parallel conversion unit (78) is coupled to the converter (76) to sample the digital signal at a rate greater than the pulse repetition frequency of the received signal. A signal processor (80) is coupled to the serial-to-parallel conversion unit (78) to produce an output signal representative of the received data.

In a display driver, image data are assembled with synchronization information to form a stream of digital data. The stream of digital data is transmitted from a timing controller to a data driver along with a timing signal having phase-delayed pulses obtained from an external clock received by the timing controller. In response to the timing signal, the data driver can extract a synchronizing signal from the synchronization information embedded in the stream of digital data, and use the synchronizing signal for generating an internal clock signal. Encoded image data in the stream of digital data then can be retrieved according to the internal clock signal.

The invention relates to an ultrafast continuous imaging device and method, and belongs to the technical field of ultrafast imaging. The device comprises an ultrafast laser, a first beam expanding lens, a second beam expanding lens, a delayer, a focusing lens, an observation object, a disperse lens and a camera array. According to the method, the ultrafast laser is used for generating femtosecond-order ultrashort pulses, step type lenses with different thicknesses are used for achieving a femtosecond-order delay pulse sequence, different sub-pulses pass the same detecting point through a focusing-dispersing method, and it can be guaranteed that an imaging light beam can be horizontally ejected; imaging is carried out through the camera array at different times. The ultrafast continuous imaging device and method can break through the bottleneck of time resolving power, and the time resolving power is improved to the femtosecond order. For the process with no repeated experiment condition, continuous imaging can be achieved at a time during an experiment. A control circuit is not needed, and cost is reduced. The structure is relatively simple and easy to achieve.

The invention provides an arbitrary height analog device of a pulse-system radio altimeter and belongs to the technical field of testing and diagnosis of avionic devices. Arbitrary height analog, height dynamic change analog and responsive probability analog in an altimeter height measurement range are achieved. The analog device comprises a signal receiving module, a digital signal processing module and a signal emitting module, wherein the signal receiving module performs frequency measurement, wave detection and comparison on signals transmitted by the altimeter, and a reference pulse of TTL level is formed; an FPGA is adopted for performing programmable precise delay, pulse width control, responsive probability analog and other processing on the reference pulse, and delayed pulses with time delay amount, pulse width, the number of the pulses controllable are generated; the signal emitting module achieves analog echo signals of pulse modulation by controlling an analog switch through delayed pulse signals. The radio altimeter arbitrary height analog device is applicable to internal and external field functions of existing various pulse-system radio altimeters, performance detection and performance maintenance.

The invention provides an illumination control system utilizing a microcontroller and an illumination control method. The illumination control system mainly comprises the microcontroller, a semiconductor switch element and a light source load. The microcontroller outputs zero crossing point delay pulses which are synchronous with a positive and negative half cycle of an alternating current power supply so as to trigger and control the conduction time interval of the semiconductor switch element, and switches and outputs zero crossing point delay pulses with different delay time according to external control signals so as to control the conduction time interval of the semiconductor switch element respectively to transfer different average electric power to the light source load, thereby enabling the light source load to output different illumination intensity. The illumination control system is suitable for light sources of different load types simultaneously, especially filament lamps, daylight lamps and alternating current light-emitting diodes.

A digitally controlled oscillator (DCO) includes a pulse generator for generating a pulse signal upon an edge of a trigger signal, and at least one delay circuit coupled to delay the pulse signal generated by the pulse generator. The pulse generator is coupled to receive one of the delayed pulse signal from the at least one delay circuit and an enable signal as the trigger signal. A digitally controlled varactor (DCV) includes a transistor having a gate, a source, a drain, and a substrate, wherein at least one of the gate, the source, the drain, and the substrate is coupled to receive one of two or more voltages, wherein at least one of the two or more voltages is not a power supply voltage or ground.

A temperature detection circuit includes: a voltage generator that is connected to a first voltage line having first voltage and a second voltage line having second voltage and to output a third voltage to a third voltage line, the third voltage being obtained by transforming the first voltage to be stepped down as an ambient temperature becomes higher; and a detecting unit that includes: a delay section that is connected to the second voltage line and the third voltage line and to receive a pulse signal, the delay section being configured to output a delayed pulse signal that is obtained by delaying the pulse signal for a delay time set to be longer as the third voltage becomes lower; and a temperature detecting section that is configured to: receive the delayed pulse signal and the pulse signal; latch the delayed pulse signal based on the pulse signal; output the latched signal as a detection result.

A unit is described that is configured to control detonation of a munition such that the munition is detonated at a desired altitude. The unit includes a radar transmitter, a radar receiver that includes a radar range gate, and a sequencer. The sequencer is configured to receive a detonation altitude and set the range gate based on the received detonation altitude. The unit is also configured to output a detonation signal when radar return pulses received by the receiver aligned with gate delay pulses from the range gate.

A data strobe signal generator includes a control unit, a pulse delay unit, a clock generator, and a data strobe output unit. The control unit generates a CAS latency signal and a preamble signal. The pulse delay unit delays a pulse signal for predetermined time and outputs a delayed pulse signal. The clock generator outputs a control clock signal. The data strobe output unit outputs a data strobe signal. The data strobe signal generator and the semiconductor memory device having the same generate a data strobe signal based on an adjustable preamble value, thereby ensuring the stabilized data output operation of a high-speed memory device.

A circuit for monitoring and controlling a clock signal generated by a clock source in a microprocessor device may include a voltage divider network that provides a plurality of voltages, a selector device that receives the plurality of voltages and provides a scaled supply voltage and a scaled ground voltage from the plurality of voltages, and at least one delay element that receives the scaled supply voltage and the scaled ground voltage and generates a delayed pulse signal by applying a delay to each pulse of the clock signal. The delayed pulse signal may include a delay magnitude that is controllable by the scaled supply voltage and the scaled ground voltage, such that the delayed pulse signal is used to generate a frequency correction signal based on a variation to a supply voltage of the microprocessor. The frequency correction signal may then be applied to the clock source.