30 results about "Digital signal conditioning" patented technology

Circuitry for monitoring the operation of an optoelectronic transceiver includes a sequence of interconnected signal processing circuits for processing an analog input signal and producing a digital result signal, where the analog signal represents one or more operating conditions of the optoelectronic transceiver. The sequence of signal processing circuits include gain circuitry for amplifying or attenuating the analog input signal by a gain value to produce a scaled analog signal, an analog to digital converter for converting the scaled analog signal into a first digital signal, and digital adjustment circuitry for digitally adjusting the first digital signal to produce the digital result signal. The digital adjustment circuitry includes shifting circuitry configured to shift an input digital signal in accordance with a shift value so as to produce a digital shifted signal. The digital result signal is stored in memory in predefined locations accessible by a host.

A system and method of digital beamforming for a monobit phased array radar system includes providing a plurality of monobit analog signals received by at least one antenna to at least one field programmable gate array (FPGA). A plurality of monobit SerDes transceivers within the FPGA convert the plurality of monobit analog signals into a plurality of multibit digital signals, each of the multibit digital signals being modified according to a digital signal conditioning value to calibrate, phase align, and synchronize the digital signals. A digital beam is formed by coherently combining the plurality of digital signals within the FPGA.

Methods, systems and other embodiments associated with pre-processing a signal for spectral analysis are presented. A system for pre-processing a digital input signal includes a digital down converter (DDC), an interpolator, and a series of down samplers. The DDC modulates the digital input signal to create a down converted signal. The interpolator re-samples the down converted signal to produce a re-sampled signal. The series of down samplers produces down sampled signals. The multiplexer selects one of the digital input signal, the down converted signal, and the down sampled signals and routes the selected signal to an output line.

The invention discloses a signal conditioning circuit and a double sampling retaining circuit. The signal conditioning circuit comprises a first chopping switch, a programmable gain amplifier, a second chopping switch, a double sampling retaining circuit, an analog-to-digital converter, and a digital reduction sampling filter which are connected in sequence. The double sampling retaining circuit samples outputs of the programmable gain amplifier in two-phase positions of a chopping clock, and the results of two samplings are added. and an added output voltage istransmitted to and processed by the analog-to-digital converter, and the digital reduction sampling filter. Since the double sampling retaining circuit is added, the invention avoids the residual andoff-tune problem in a chopping amplifier. Meanwhile, the invention facilitates the integration of a single chip, without the need of external filtering capacitor. Furthermore, a novel sequential control reduces the consumption of a digital signal conditioning circuit based on a chopping amplifier.

The invention discloses a radio frequency front end of electronic toll collection equipment. The radio frequency front end comprises multiple radio frequency transceivers different in receiving frequency point range, a digital signal conditioning circuit and a microcontroller, the radio frequency transceivers are used for synchronously receiving radio frequency signals and demodulating and decoding the same to generate digital signals, the digital signal conditioning circuit is used for performing logic and processing on the digital signals output synchronously by the radio frequency transceiver to generate narrow-bandwidth digital signals, and the microcontroller is used for reading the narrow-bandwidth digital signals generated by the digital signal conditioning circuit. By performing logic and processing on the digital signals output by the radio frequency transceivers, narrow-bandwidth receiving can be realized effectively, so that signal quality and accuracy are improved. The invention further discloses the electronic toll collection equipment and a radio frequency receiving method thereof, which have the above advantages.

The invention relates to a realization method of general digital signal conditioning. For the output signal conditioning of general signals, a two-way optical control isolation MOS relay is used to form a two-way channel for the flow direction of external signals; for the access of multi-voltage signals, a multi-selection One jumper block realizes multi-voltage access conditioning; for multi-form loads, single-point bidirectional high-current channels are used to solve single-point signal conditioning; dual-point differential output is used to solve differential signal conditioning. For the input signal conditioning in the general signal, the two-way optocoupler is connected in series, and the configuration method of connecting different resistance resistors through an external multi-choice jumper block is used to realize the input signal conditioning of the single-point signal with different voltages and different current directions; The diode and the bidirectional optocoupler are connected in series and the conditioning of the dual-point input signal is realized through a configuration method in which two continuous channels are associated. The invention adopts simple components, low material cost, small volume, simple operation and wide adaptability.

The invention discloses a miniature fixed wing unmanned aerial plane guidance computer and a guidance method and belongs to the technical field of unmanned aerial plane control. The guidance computer is composed of a power panel and a control signal processing board. The power panel comprises a power transformation circuit module and a simulation reference voltage module. The control signal processing panel comprises an IO driving module, a simulation signal conditioning module, a digital signal conditioning module and a CPU module. The guidance method of the invention can be compatible with the two tracking modes of vertex tracking and fixed distance tracking. The vertex tracking and fixed distance tracking guidance method adopts a unified form, and two types of tracking guidance modes are realized by only sending a variable value instruction. The invention can automatically switch the tracking mode of the unmanned aerial vehicle according to the change of the ground movement speed, can artificially control the tracking mode according to the remote control instruction, and can improve the tracking efficiency and ensure the security when the unmanned aerial vehicle is switching the tracking mode.

The invention discloses a washing machine and a data transmission method thereof, and a data signal conditioning device for a washing machine. The data signal conditioning device comprises multiple CAN conversion units, a CAN communication interface and a central processing unit. Each CAN conversion unit is correspondingly connected with multiple data transmission interfaces. Each data transmission interface is used for connecting a corresponding sensor or functional plate. Each CAN conversion unit receives external data through a corresponding data transmission interface and converts the received external data into CAN data. The central processing unit is connected with each CAN conversion unit and the CAN communication interface and receives the CAN data sent by each CAN conversion unit, recodes the received CAN data to obtain coding data of different functions, and sequentially sends the coding data via the CAN communication interface according to the priority level of the coding data. The data signal conditioning device can achieve data transmission in a way that multiple data transmission modes share the same bus.

The invention discloses a device and method for detecting an air-conditioner control panel, and the device comprises a main control chip, a storage unit, a first analog signal input conditioning circuit, a first digital signal conditioning circuit, a resistance signal output conditioning circuit, an alarm and a display, wherein the storage unit, the first analog signal input conditioning circuit, the first digital signal conditioning circuit, the resistance signal output conditioning circuit, the alarm and the display are respectively in electrical connection with the main control chip. The device also comprises a hybrid motor and a compressor. The first analog signal input conditioning circuit is electrically connected with a processing chip of the air-conditioner control panel and the hybrid motor. The first digital signal conditioning circuit is electrically connected with the compressor. The air-conditioner control panel also comprises a temperature adjustment rotary knob. The processing chip is electrically connected with the temperature adjustment rotary knob, the hybrid motor and the compressor. The device is high in detection efficiency and precision, is good in detection consistency, and effectively reduces the misjudgement rate and judgment leakage.

The invention relates to a GPU-based data stream-driven real-time electromagnetic spectrum analysis system and method. A high-performance GPU is adopted as a computing and processing core of a real-time spectrum measurement and analysis device or system; a high-speed display memory inside the high-performance GPU is used as a cache of the device or the system; a high-speed bus inside the GPU replaces the bus of the device or the system; a data transmission link is set inside the GPU; a data stream driving mode is adopted to realize high-speed transmission, time domain-frequency domain conversion, digital filtering, digital signal conditioning, data compression, display processing and other functions of digital signals after sampling, and thus, synchronization requirements of signal processing and test sampling in real-time spectrum measurement and analysis are met. The analysis system disclosed in the invention can greatly improve the analysis and processing capability of digital signals so as to match the signal sampling speed, buffer overflow caused by untimely processing and signal loss can be avoided, and real-time spectrum measurement and analysis on the broadband or transientelectromagnetic signals can be further realized.

Disclosed is a digital signal conditioning chip of a full-bridge and piezoresistive pressure sensor, which mainly comprises a bandgap reference voltage module, an adjustable gain calculation amplifier module and a digital control unit module. The invention is characterized in that a positive temperature coefficient voltage is generated in the bandgap reference voltage module to provide an energizing voltage for the full-bridge and piezoresistive pressure sensor, the digital control unit module is equipped with a memory and an inner clock circuit, the gain in the adjustable gain switch capacity calculation amplifier is confirmed by the digital control unit module according to the parameter of positive temperature coefficient, zero temperature coefficient and zero output value. The digital signal conditioning chip of a full-bridge and piezoresistive pressure sensor has the advantages that the conditioning chip realizes effect compensation of sensitivity, zero drift compensation and adjustment of zero output, and is high in conditioning accuracy and low in cost.

The invention discloses a subharmonic detection method based on cascade delay signal elimination method, comprising steps of obtaining a,b,c three-phase voltage signals of a power grid load terminal through a voltage sensor and a digital regulation circuit, utilizing a Clark transform to obtain a voltage signal under two-phase static coordinate system vabc=[va,vb,vc]<T>, (2) performing filtering process based on the delay signal elimination on the V alpha Beta which is obtained through transformation to obtain voltage signals which only contains odd- number harmonic component and voltage signal which only contains the even-number harmonic component, (3) performing filtering processing based on the cascade delay signal elimination on the voltage signals which only contain the odd-number harmonic wave component and the voltage signals which only contain the even-number harmonic component to obtain the components of positive sequence and negative sequence of any subharnonic, and (4) performing superposition on the harmonic components to obtain a total harmonic signal. The invention is high in detection accuracy and high a practicability.

The present invention proposes a multi-channel large dynamic range data acquisition system, said data acquisition system is based on the FPGA unit implementation, said data acquisition system includes: a number of parallel data acquisition channels, for the analog signal to be measured Perform conditioning and amplification, and convert the conditioned and amplified analog signal into a digital signal; the acquisition control module is used to control and manage each data acquisition channel, including: the start or stop command of each channel, the issuance of gain parameters, each Arrangement, extraction of data acquisition channel data and packaging of uploaded data; bus control module, used to control the access and communication of the data acquisition system with multi-channel and large dynamic range to the external bus according to the CPCI bus protocol, and also customize the interface of DSP and MCU ; The clock management module is used to provide clocks for the analog-to-digital converters, the acquisition control module and the bus control module of each data acquisition channel.