584 results about "Digital input" patented technology

Method and apparatus for skew error measurement and correction in a digital-to-analog converter (DAC) using a time-to-digital converter (TDC). A DAC includes a main DAC and a TDC. The main DAC includes a plurality of DAC cells. The main DAC is configured to generate an analog output signal based on digital input data. The TDC is coupled to an output of the main DAC and configured to measure a timing error of the main DAC. The timing error may be measured on a DAC cell basis or a subset of DAC cells basis.

Method and device(s) for supporting performance of machine learning based CFR and DPD on multiple digital input signals relating to different frequency bands, respectively, in order to signal condition said signals before power amplification and subsequent transmission in said frequency bands by a wireless communication network. The device(s) obtain said multiple digital input signals as complex valued signals. The device(s) perform feature construction that takes said multiple digital input signals as input and provides constructed feature signals according to predefined constructed feature types as output. Said predefined constructed feature types relate to at least the following per complex valued sample of the obtained complex valued multiple digital input signals the real part of the sample, the imaginary part of the sample and at least one of the absolute value of the sample and the phase of the sample.

An apparatus and configuring scheme where a capacitive input circuit can be programmed to perform different logic functions by adjusting the switching threshold of the capacitive input circuit. Digital inputs are received by respective capacitors on first terminals of those capacitors. The second terminals of the capacitors are connected to a summing node. A pull-up and pull-down device are coupled to the summing node. The pull-up and pull-down devices are controlled separately. During a reset phase, the pull-up and / or pull-down devices are turned on or off in a sequence, and inputs to the capacitors are set to condition the voltage on node n1. As such, a threshold for the capacitive input circuit is set. After the reset phase, an evaluation phase follows. In the evaluation phase, the output of the capacitive input circuit is determined based on the inputs and the logic function configured during the reset phase.

Aspects of the subject disclosure may include, for example, receiving a plurality of modulated optical wavelengths generated from digital input data and unmodulated optical wavelengths. The one or more of the plurality of modulated optical wavelengths undergo an optical operation and are converted into one or more electrical signals. The optical operation increases a signal to noise ratio (SNR) of the one or more electrical signals to exceed an SNR threshold. Additionally, the one or more electrical signals are processed to produce digital output data. Other embodiments are disclosed.

A signal processing method for selectively removing noise from a digital input signal is provided. The method includes the steps of, for example, receiving, by a signal input, a digital input signal of a device under test, determining, by an analysis circuit, a DUT noise contribution to noise of the digital input signal, wherein the DUT noise contribution is associated with noise originating from the device under test, reducing, by the analysis circuit, a noise level of the digital input signal to a noise level of the DUT noise contribution determined, thereby obtaining a noise-reduced output signal, and providing the noise-reduced output signal to a measurement application for further processing. A signal processing system for carrying out the method or others is also provided.

An image processor for a medical observation device includes a color conversion function, The image processor is configured to retrieve an input pixel of a digital input color image and a location of the input pixel in the input color image, and apply the color conversion function to the input pixel to generate an output pixel in a digital output color image. The color conversion function depends on the location of the input pixel.

The invention discloses a serial-port-based digital input and output control method and device and a storage medium, and relates to the technical field of electronic digital data processing.The serial-port-based digital input and output control method comprises the steps that if it is detected that a main board serial port is connected into a daughter card, serial port clock frequency multiplication is determined in response to programming interface calling; assembling the data to be transmitted into a communication instruction corresponding to the current frame; and transmitting the communication instruction to the daughter card through the serial port based on the baud rate determined by the serial port clock frequency multiplication. Therefore, the technical effect of reducing serial port data transmission delay so as to realize high-speed digital input and output expansion is realized.

A signal processing method includes: receiving, by a signal input, a digital input signal from a device under test; capturing, by a measurement circuit, at least one IQ measurement set based on the received input signal, wherein the at least one IQ measurement set comprises a plurality of IQ measurement points; determining, by an analysis circuit, a total noise of the digital input signal over frequency based on the at least one IQ measurement set; determining, by the analysis circuit, an instrument noise over frequency, wherein the instrument noise corresponds to noise generated by the measurement instrument; and determining, by the analysis circuit, a ratio of the instrument noise and the total noise over frequency, thereby obtaining a frequency-dependent scaling factor. Further, a measurement instrument is described.

The invention belongs to the field of analog integrated circuit design, and particularly relates to a miniaturized high-precision non-binary R-2R DAC with digital correction. Non-binary characteristics are introduced by setting resistance values of bridge resistors RBm and RBm + 1, so that an LSB section is a binary weight section, and ISB and MSB are non-binary weight sections; therefore, the width-to-length ratios of the MOS tubes of the switches SWm + 1-SWm + i + j and SW1 are equal and do not need to be increased proportionally, the non-binary characteristic is further introduced by setting the switch on-resistance, the selection of the unit resistance R only needs to meet the matching precision of the LSB section, and the area of the switch resistor array is greatly reduced. Static errors in the ISB segment and the MSB segment are respectively corrected by using an OEM correction technology, only digital code redundancy between adjacent segments of the LSB segment, the ISB segment and the MSB segment needs to be obtained through measurement, redundant digital codes are removed by adjusting digital input codes of corresponding segments, and the m + n + k-1 bit binary DAC is obtained through calibration, so that the memory of a digital calibration algorithm is efficient, and the algorithm complexity is effectively reduced. According to the invention, the area of the DAC is obviously reduced while high precision is realized.

The invention discloses an ODAC implementation system and method based on a five-segment thermo-optical phase modulator, and relates to the technical field of optical communication, and the method comprises the following steps: obtaining single-mode laser input, dividing the single-mode laser input into two paths through a multi-mode interference device beam splitter, and transmitting the single-mode laser input into an upper arm and a lower arm of a Mach-Zehnder modulator; the current is adjusted through the thermo-optic phase modulator to control the temperature, the refractive index is changed to introduce phase delay, and the phase difference of two arms of the Mach-Zehnder modulator is calibrated; on the basis of a five-segment thermo-optical modulator, hierarchical amplitude modulation is carried out on beam splitting light according to digital input, a phase space is constructed by utilizing weight combination, and a linear optimal discrete state is screened; the modulated light is combined by a multi-mode interference device beam combiner, and digital-analog mapping output of light intensity is carried out; a detector installed at an output port of the five-segment thermo-optical phase modulator is used for monitoring output optical power in real time, the output optical power is fed back to a control circuit to calculate errors, thermo-optical modulation current is dynamically adjusted to compensate offset point drift, and optical digital analog conversion is achieved.

To provide a control device, a vehicle refrigeration system, and a refrigeration vehicle capable of using many kinds of power supply devices as a power supply for refrigeration while suppressing the increase of the size of a communication circuit of the control device and the scale of communication software.SOLUTION: The present invention relates to a control device that is provided in a vehicle refrigeration system having a refrigeration device, and performs supply control of power supplied to the refrigeration device from a power supply device connected to the refrigeration device. The control device includes: a main connection circuit that has a communication connection terminal for a predetermined communication method, and when the power supply device is connected to the communication connection terminal, transmits and receives a control signal related to the supply control of power via the communication connection terminal; and an auxiliary connection circuit that has a digital output terminal and a digital input terminal, and when the power supply device is connected to the digital output terminal and the digital input terminal, outputs a digital signal indicating an operating state of the refrigeration device from the digital output terminal and takes in a digital signal specifying the operating state of the refrigeration device at the digital input terminal.SELECTED DRAWING: Figure 2

The invention discloses a multi-mode input and output circuit and a control method and device. The circuit comprises an embedded control circuit, and a selection input circuit, an input AD conversion circuit, an output DA conversion circuit and a selection output circuit which are respectively connected with the embedded control circuit, the selection input circuit is configured to sample and convert an acquired current analog voltage input signal or a current analog current input signal into a first analog voltage input signal according to a first control instruction of the embedded control circuit, convert the first analog voltage input signal into a first digital input signal through the input AD conversion circuit, and then input the first digital input signal into the embedded control circuit; and the selection output circuit is configured to convert the current digital output signal output by the embedded control circuit into a corresponding second analog voltage output signal or a second analog current output signal through the output DA conversion circuit according to a second control instruction of the embedded control circuit and then output the second analog voltage output signal or the second analog current output signal. The space of an electronic product is saved; and the flexibility is improved.

The invention discloses a multipath digital quantity input signal acquisition module circuit, relates to a fire detection system, and aims to solve the problems that a signal input and output circuit of an existing acquisition module is easily interfered by an external circuit and is poor in reliability. According to the invention, a power conversion circuit converts 220V alternating current into power supply voltage of an MCU control circuit and working voltage of a signal input circuit; the signal input circuit is used for acquiring a module switch key state and detector alarm information and outputting an acquisition signal; the signal input circuit is provided with multiple paths of input and output signals, and each path of input and output signals work independently; and the MCU control circuit is used for receiving the acquisition signal output by the signal input circuit and controlling power supply output and an alarm indicating lamp according to the acquisition signal. The beneficial effects are that each input signal acquisition circuit works independently through an optocoupler, the reliability is high, and the anti-interference capability is strong.

In one embodiment, a method includes, by an electronic device, receiving a digital input indicating a type of movement. Streaming sensor data corresponding to movements of a first user can be accessed from one or more sensors of one or more wearable devices on the first user. Displacement data corresponding to the movements of the first user can be generated based on the streaming sensor data and the indicated type of movement. One or more repetitions represented in one or more corresponding segments of the displacement data can be identified based on the displacement data. The displacement data corresponding to each identified repetition may substantially match a predetermined movement signature associated with the type of movement. One or more performance metrics can be calculated for one or more of the identified repetitions. Instructions can be provided for presenting a user interface including information referencing the performance metrics.

A time-interleaved current-based digital-to-analog converter (current DAC) cell includes first input circuitry configured to receive a digital input signal, a first biasing voltage, a first clock, and a second clock. The first clock and the second clock having a phase offset from one another and having a common period. The current DAC also includes a first gate configured to, responsive to an ‘ON’ state of the first clock, pass the digital input signal to a second gate, the second gate being configured to, responsive to an ‘OFF’ state of the second clock, output a first DAC cell activation signal. The current DAC further includes first output circuitry configured to, responsive to the first DAC cell activation signal, output a first analog current signal based on (i) the digital input signal and (ii) the first biasing voltage.

A digital server power supply for digitally displaying real-time power and load efficiency through a high-precision sensor, a microcontroller, a communication module and a digital display device comprises a digital input circuit, a digital control logic module, a CRPS standard compatible module and a power consumption monitoring circuit. The digital input circuit comprises a switchable AC / DC module, a switchable DC / DC module and an input detection and identification circuit, an input path is switched through the digital control logic module, and the digital control logic module comprises a switching circuit and a power supply controller. The CRPS standard compatible module comprises a standard input interface, a standard slot, a standard communication interface and a standard DC / DC converter, and the power consumption monitoring circuit is connected with the power supply controller and is used for monitoring real-time power and load efficiency of the digital server power supply and outputting a monitoring result to the LCD display screen through data processing so as to realize man-machine interaction.

The invention discloses a high-frequency digital phase-locked amplifier based on a parallel digital algorithm and a control method. The amplifier comprises an analog-to-digital converter module, a serial-to-parallel module, an N parallel frequency measurement module, an N parallel phase-locked loop module and an N parallel input coherent demodulation module. The method comprises the following steps: acquiring an analog input signal and a reference signal, and sampling; performing serial-parallel conversion processing on the sampled digital input signal and the digital reference signal; performing frequency measurement on the N parallel digital reference signals to obtain reference signal frequency measurement information; performing phase locking adjustment on the N parallel digital reference signals to obtain frequency information and phase information; and performing demodulation processing on the N parallel digital input signals to obtain amplitude information, phase information and XY component information of the digital input signals. The embodiment of the invention can reduce the rate of the data flow and improve the throughput of the data information, thereby improving the bandwidth of the phase-locked amplification system. The invention can be widely applied to the technical field of phase-locked amplification.

Certain aspects of the present disclosure provide techniques and apparatus for digital-to-analog conversion. An example apparatus generally includes a digital-to-analog converter (DAC), an incremental analog-to-digital converter (IADC) having a first input coupled to a first output of the DAC, and a controller coupled to the DAC and the IADC. The controller is configured to determine a direct current (DC) offset associated with the DAC using the IADC and control a mission-mode digital input signal of the DAC based on the DC offset.

A system an analog to digital converter (ADC) operatively connected to receive an analog input signal from an input line and to output a digital input signal. A processor is operatively connected to receive the digital input signal from the ADC and to output a digital control signal for controlling a physical system based on the digital input signal. A digital to analog converter (DAC) is operatively connected to receive a copy of the digital input signal put out from the processor, and to output an analog output signal indicative of the copy of the digital input signal put out from the processor. Comparison logic is operatively connected to receive the analog input signal from the input line, to receive the analog output signal from the DAC, and to output an error signal in response to a mismatch between the analog input signal and the analog output signal.

To provide native hardware support for complex operations such as a beam search operation, an integrated circuit device can be implemented with multiple computational circuit blocks coupled in series to form a pipeline. Each computational circuit block includes an arithmetic logic unit (ALU) circuit having a first numeric input, a second numeric input, a primary result output, and a secondary output. The ALU circuit is programmable to perform an arithmetic operation on the first numeric input and the second numeric input to generate the primary result output, and provide one of the first numeric input or the second numeric input to the secondary output, which is fed back to the ALU circuit.

The invention discloses a circuit breaker opening and closing loop monitoring system and method, relates to the technical field of electric power operation and maintenance, and mainly aims to solve the problem of low monitoring accuracy of a circuit breaker opening and closing loop. The device mainly comprises a circuit breaker auxiliary contact and a circuit breaker opening and closing loop monitor, the circuit breaker opening and closing loop monitor comprises a switching value input circuit, a first voltage monitoring circuit, a second voltage monitoring circuit, a central control module and an alarm circuit, the state of the auxiliary contact is collected, and the opening and closing state of the circuit breaker is determined according to the state of the auxiliary contact. And collecting a first voltage value at two ends of a normally closed contact of the circuit breaker and a second voltage value at two ends of a normally open contact of the circuit breaker, and monitoring a corresponding loop according to the opening and closing states of the circuit breaker and a comparison result of the first voltage value or the second voltage value and a preset voltage threshold value. The circuit breaker is used for monitoring the integrity of a closing loop in a closing state of the circuit breaker and the integrity of an opening loop in an opening state of the circuit breaker, and giving an alarm under the condition that the loops are broken.

There is disclosed a system and a method of pairing and mapping an input device with a game client software. The method comprises an input device transmitting one or more bitmaps identifying analog and digital input schemes for the input device. The game client software, thereafter, can respond to inputs from the input device in the form identified by the one or more bitmaps.

Aspects of the present disclosure include receiving a digital input signal having an identified value, determining a number of a plurality of converters, determining, based on the identified value and the number, a minimum number of one or more minimum output configurations, parsing the digital input into a plurality of individual bits, and transmitting the plurality of individual bits to the plurality of converters based on an output configuration of the one or more minimum output configurations.

A portable electronic device comprising a microcontroller, a secure element, and at least one peripheral component controlled by the secure element, wherein the secure element is connected to the microcontroller through a first serial data link and is connected to the peripheral component through at least one second serial data link. At least one digital input of the peripheral component is connected to at least one digital input / output of the microcontroller and the secure element is configured to send to the microcontroller, via the first data link, control commands of said digital input / output of the microcontroller such that it provides a specified signal on the digital input of the peripheral component.

The invention relates to the technical field of industrial control, and discloses a data analysis processing controller. The controller comprises a cabinet, an aviation plug front panel and a cabinet VPX backboard. External 24V direct current is connected with a cabinet VPX backboard through the power supply filtering module and is reduced to 12V direct current through the power supply module. A main control module, a digital quantity input / output module, an analog quantity input / output module and two reserved slot positions are integrated on a VPX backboard of the case, and all the modules are inserted into the standard slot positions through VPX connectors. The main control module is communicated with the function module through an RS232 bus and is integrated with a gigabit Ethernet, an RS485 interface and a CAN (Controller Area Network) interface; the digital quantity module adopts a dual-channel optical coupler isolation and self-checking technology, and the analog quantity module realizes dynamic fault switching through redundant output and controllable voltage superposition. Internal cable connection is eliminated through a VPX framework, the reliability, expansibility and real-time response capability of the system are remarkably improved by combining multi-stage power supply filtering and cold conduction and heat dissipation design, and the system is suitable for ship distance adjusting devices and other complex industrial environments.

A fault event monitor and filter having a digital comparator receiving a digital input value, wherein the digital comparator generates a plurality of outputs based on programmable threshold input values, a first counter coupled to a first output of the plurality of outputs of the digital comparator, a second counter coupled to a second output of the plurality of outputs of the digital comparator, and an output controller with a first input coupled to an output of the first counter and with a second input coupled to an output of the second counter, wherein the output controller to generate a fault event signal based at least partially on signals received from the first and second counters.

The utility model provides a subway vehicle auxiliary inverter main control board off-line test device based on hardware design. The subway vehicle auxiliary inverter main control board off-line test device comprises a test module and an upper computer. The upper computer is used for displaying test information of the vehicle auxiliary inverter main control board; the test module comprises a direct current signal simulation unit which is connected with the vehicle auxiliary inversion main control board and sends a direct current simulation signal to the vehicle auxiliary inversion main control board so as to drive the vehicle auxiliary inversion main control board to test; the alternating current signal simulation unit is connected with the vehicle auxiliary inversion main control board and sends an alternating current simulation signal to the vehicle auxiliary inversion main control board to test the vehicle auxiliary inversion main control board; and the digital input and output unit is connected with the vehicle auxiliary inversion main control board and is used for inputting the condition signal and testing the vehicle auxiliary inversion main control board to be tested, and the digital input and output unit is also used for outputting the state information of the vehicle auxiliary inversion main control board. According to the utility model, the off-line test of the auxiliary inversion main control board of the subway vehicle can be realized.

Methods and apparatus for performing crest factor reduction (CFR) to adjust the output power of a digital-to-analog converter (DAC) are described. An example method includes applying CFR to a digital input signal to generate a crest factor reduced signal. Applying CFR includes: (a) adjusting an amplitude of a real component of the digital input signal based on a first threshold while maintaining a phase of the digital input signal; and (b) adjusting the amplitude of the imaginary component of the digital input signal based on a second threshold while maintaining the phase of the digital input signal. The crest factor reduced signal is converted to an analog signal via a DAC.

A complementary current-steering digital-to-analog converter (DAC) including a p-type DAC as well as an n-type DAC is shown. The p-type DAC has p-type current sources, and the n-type DAC has n-type current sources. The p-type current sources are coupled to a first input terminal or a second input terminal of a transimpedance amplifier (TIA) according to a digital input of the complementary current-steering DAC. The n-type current sources are coupled to the first input terminal or the second input terminal of the TIA according to the digital input of the complementary current-steering digital-to-analog converter.

The invention belongs to the field of oil-gas exploration, particularly relates to a gas-liquid two-phase metering method, system and equipment based on a fusion algorithm, and aims to solve the problem that gas-liquid two phases are difficult to meter. The method comprises the following steps: collecting original data in a target pipeline as input data through a multi-sensor module; converting the input data through an A / D converter to obtain digital input data; filtering and denoising the digital input data to obtain preprocessed input data; performing feature extraction on the preprocessed input data to obtain a sensor measurement value; performing fusion calculation on the sensor measurement values through a multi-source data fusion algorithm to obtain an initial flow value; based on a sensor measurement value, an initial flow value is corrected through a gas-liquid two-phase proportion measured by a precession vortex sensor and a high-precision matrix data iterative transmission algorithm between differential pressure flowmeters, and a corrected two-phase flow value is obtained.