347 results about "Low-power electronics" patented technology

The invention discloses a human body falling monitoring method and a device based on acceleration and height information. The device comprises a sensing module, a processing and controlling module, a communication module, a wear detecting module and a power supply module. The sensing module provided with an accelerometer and a height gauge is connected with the processing and controlling module based on a low power consumption single chip computer, and continuously monitors the acceleration and height change of a wearer in daily activities. The wear detecting module checks the wearing method of the device. The processing and controlling module starts a bluetooth communication module to send alarm information when the device judges that the wearer falls according to collected acceleration and height data. A wearing buckle capable of being placed on a waistband of the wearer comprises a magnet, and therefore the device is capable of inspecting whether position-wearing is achieved. The human body falling monitoring method and the device based on the acceleration and the height information has the advantages that falling occurrence can be found accurately and timely by means of combination of continuously monitored acceleration information and height information, energy consumption is reduced by means of a low-power design and high energy efficiency management, and therefore long-term and continuous working is achieved.

A method and apparatus for design-for-low-power of register transfer level (RTL) controller / data path circuits that implement control-flow intensive specifications. The method of the invention focuses on multiplexer networks and registers which dominate the total circuit power consumption and reduces generation and propagation of glitches in both the control and data path parts of the circuit. Further the method reduces glitching power consumption by minimizing propagation of glitches in the RTL circuit through restructuring multiplexer networks (to enhance data correlations and eliminate glitchy control signals), clocking control signals, and inserting selective rising / falling delays, in order to kill the propagation of glitches from control as well as data signals. To reduce power consumption in registers, the clock inputs to registers are gated with conditions derived by an analysis of the RTL circuit, ensuring that glitches are not introduced on the clock signals.

The present invention discloses a new type active radio frequency identification (RFID) system and its operation method. The described system includes active RFID tag, active reader and its communication protocol. Said system is worked at 2.45 GHz of ISM frequency channel, the described tag portion includes microprocessor, radio frequency receiving / sending chip, power supply management, real time clock (RTC) and antenna. The described reader mainly includes microprocessor, radio frequency receiving and sending chip, power supply management, real-time clock (RTC), liquid crystal display, external interface module and antenna, etc. At the same time it provides RS-232 interface, and can implement communication with PC machine.

A computer-implemented method for debugging the power aspect of an IC design by integrating the power specification expressed in certain power specification format and its corresponding circuit design within a power schematic diagram called power map. Power map is created by using a power data base generated by regrouping the original circuit design hierarchy to new hierarchies defined by the power specification. Power map contains power cell symbols (such as isolation cells, level shifters, power switches) and signal nets, and can show the relationship between power domains. Power map can also display mismatches or errors between the power specification and the circuit design for those signals connecting the power domains. Furthermore, power map can be used in conjunction with simulation result.

Disclosed are low power electronic devices configured to exploit the sub-threshold swing, unidirectional tunneling, and low-voltage operation of steep slope-tunnel tunnel field-effect transistors (TFET) to improve power-conversion efficiency and power-efficiency of electrical systems incorporating the TFET as an electrical component to perform energy harvesting, signal processing, and related operations. The devices include a HTFET-based rectifier having various topologies, a HTFET-based DC-DC charge pump converter, a HTFET-based amplifier having an amplifier circuit including a telescopic operational transconductance amplifier, and a HTFET-based SAR A / D converter having a HTFET-based transmission gate DFF. Any one of the devices may be used to generate a RF-powered system with improved power conversion efficiencies of power harvesters and power efficiencies of processing components within the system.

The invention relates to a method for predicting and quantifying a binary charge redistribution type successive approximation analog-to-digital converter, and belongs to the technical field of analog-to-digital conversion. According to the method provided by the invention, a high P bit code of a previous quantification result is directly loaded in the quantification result of the present high P bit based on a common mode voltage reset structure capacitor array DAC, a prediction result is judged according to twice switching results before and after the switching of a redundant capacitor, the comparison of the residual low bits can be carried out in the case of prediction correctness, the capacitance of a lower polar plate of the high P bit is reset in the case of a prediction error, and the traditional quantification from the most significant bit to the least significant bit (MSB_First) is carried out again. By adoption of the method provided by the invention, the switching frequency of a digital-to-analog converter module and the comparison times of a comparator are maximally reduced, the average quantification power consumption of the low and medium frequency portions of signals are greatly reduced, and a low power consumption design is realized; and the method provided by the invention can be used as a feature parameter extraction means of electrocardiogram (ECG), electroencephalogram (EEG) and other biological medical signals so as to extract extreme values and frequency characteristics of target signals under extremely low power consumption.

The invention discloses a wireless charged handset and a self-contained wireless charging set of the handset. A loop is arranged in the wireless charging set, and is used as an electromagnetic field emitter. Another loop is arranged near the electromagnetic field emitter in the handset, and is used as an electromagnetic field receiver. Induced current is generated in the receiver through electromagnetic oscillation so that the handset can be charged in a wireless way within certain limits. The steps for wireless charging are as following: A) an electric current oscillator in the wireless charging set can produce changeable current which is transported to a loop A so that the loop A can produce changeable electromagnetic field; B) A loop B is arranged in a charging area of the wireless charging set; and induced current is produced in the loop B; C) the reduced current is transported to a charging battery of the handset to charge the battery. Compared with prior various wireless charging sets, the charging set which charges through exchange of energy of electromagnetic field is manufactured simply; the cost is low; and the capacity usage ratio is high. The charging set can charge various low power electronic products, such as handset and so on, in a wireless way.

Power information associated with an IC design is displayed graphically and hierarchically using a power map, thereby providing an intuitive way for describing the power distribution among various power domains of the IC and parent-child relationships within the power domains. Each power domain is associated with a power control for controlling the power domain. The status of the power control for each power domain is displayed on the power map. The power map may include a token to set and display current operating mode of the IC design to enable the IC design to be debugged under different operating modes.

The invention discloses a low-power-consumption wireless monitor and control system for an agricultural greenhouse. The system comprises a remote Web server, a gateway and wireless monitor and control nodes. The wireless monitor and control nodes are responsible for monitoring soil temperature and humidity of a parcel and executing a control command sent from the gateway; the gateway receives data from each wireless monitor and control node and displays the data on a screen in real time, and realizes data interaction with the remote Web server through a 3G network; and the remote Web server provides a monitor and control method with which a farmer can realize remote access by utilizing a browser on a mobile phone and a computer. The wireless monitor and control nodes are powered by lithium batteries, and software and hardware can work for a long time stably by utilizing the low-power-consumption design, so that the system can be arranged at any place of the greenhouse conveniently without being limited by wiring difficulty.

A multi-level collaborative low-power design method includes firstly establishing an SoC (system on chip); secondly, completing a system-level low-power design; thirdly, completing a register transfer-level low-power design; fourthly, completing a gate-level low-power design; and fifthly, completing system function verification. The design method is operated from the top to the bottom, results of power optimization of each level are overlapped, the low-power design is performed at multiple levels collaboratively, and optimization and choosing of power can be performed better as required; the power of the entire system is lowered, meanwhile, normal functions can be guaranteed, and effect of lowering the power is more significant.

The invention relates to a control display method of an automobile digital instrument and a device, which are used for displaying various status signals of the automobile in running process. The aim of the invention is realized as follows: the device consists of a CAN bus, an MCU, a pointer digital instrument, an information indicating light, an LCD digital display screen and an LCD comprehensive display screen; the running steps include start; communication management of the CAN bus; receiving and processing information sent by the CAN bus by virtue of the MCU; the display of the pointer instrument, the display of a warning signal; mileage display; comprehensive display; and stop. The invention uses the pointer instrument of a stepping motor with accurate indication. By using the comprehensive display screen, the invention has powerful comprehensive information display function, complete menu operation function, multi-purpose function of one screen and clear voice and character warning function. The invention is also characterized by accurate and reliable mileage display, complete CAN communication network management and unique low power consumption design.

The invention discloses a method for dynamically adjusting backlight brightness based on the image content. The method can dynamically adjust a backlight and adjust the image contrast effectively. The method includes the following steps: (1) calculating the gray level histogram of an image to be used for calculating the highest degree of distortion and the largest gain coefficient of the image; (2) limiting the maximum value of the gain coefficient to reduce the influences that the display effect is weakened and a user feels uncomfortable in vision, wherein the influences are caused by sudden change of the backlight; (3) according to the ambient brightness, determining the minimum value of the current brightness of a mobile phone to determine the current maximum distortion so that the situation that the user is unable to recognize the content on a screen because the environment is too bright will not happen; (4) introducing an image similarity algorithm of a historical frame and a current frame to reduce the number of times of calculation of the gain coefficient. The method dynamically adjusts the backlight according to the display content on the screen, reduces calculation amount to the greatest extent under the condition that the effect of the calculation amount on the performance of the mobile phone is taken into consideration, compensates for the caused image distortion, and ensures that the visual experience of the user will not be affected by the design of low power consumption.

An analog variable gain amplifier (VGA) adjusting a signal level of a mobile communication system is provided. More particularly, design of a VGA using an operational transconductance amplifier (OTA) having a wide linear input / output range is disclosed. The VGA includes two double-differential-pair OTAs and feedback resistors. A first differential input of a first double differential pair OTA receives an input signal from the forward stage, and a second differential input is negatively fed back through a differential output and a passive resistor. An input in which a first block of the connection structure and first and second differential inputs of a second double differential pair OTA are connected receives an output signal of the first block stage. The output is negatively fed back in series through a variable resistor whose resistance varies exponentially with an adjustment voltage from outside. According to the VGA, it is possible to provide a characteristic of linear variation of gain on a logarithmic scale with respect to a control voltage with a simple and inexpensive constitution. In addition, the VGA can be designed for a low pass filter having a conventional OTA used for a core circuit, and has a simple circuit structure. Therefore, the VGA is convenient for high integration and low-power design, and thus is appropriate for a terminal chip and so forth.

The invention provides a portable video conference terminal adopting an adaptive network coding method and an implementation method. According to the terminal, an audio and video acquisition module, an audio and video digital processing module, a power module and the like are integrated into a portable terminal box. The terminal is connected with a personal computing device through a USB, a client software of the video conference terminal is run automatically on the personal computing device, and a multi-party video conference can be joined as long as the personal computing device can be connected to the internet. According to the terminal, by perceiving the current communication network state, a coding controller adaptively selects a coding method and dynamically adjusts the video coding strategy according to the real-time network status to enable users at a receiving side to get the best possible real-time video image in the current network state. The terminal operates automatically and is plug-and-play after being connected with the personal computing device, because the underlying driver and the client software of the terminal both reside in the terminal. The terminal has advantages of good portability, simple operation, flexible construction, and good reliability. A low-power consumption design is adopted to realize a long standby time, so that a users can use the terminal whenever and wherever possible.

The present invention addresses the problem of transmitting optical signals with high extinction ratios using low-power drive signals. At present, low-power optical transmitters typically operate with modulation extinction ratios of, at best, about 10 dB. Embodiments of the present invention may achieve extinction ratios exceeding 20 dB using low-power drive signals of under 20 mW at data rates on the order of Gbits / sec. In addition, the modulation may be achieved with both low-power and low-fidelity drive waveforms, enabling conventional and often noisy high-speed, low-power electronics to generate high-extinction, high-fidelity optical waveforms.

The invention discloses a low-power design method for a wireless sensor network core chip. According to the low-power design method for the wireless sensor network core chip, the working mode of the chip is divided into a normal working mode and a low-power working mode, when the chip works in the normal working mode, the working frequency of the chip can be configured according to requirements of a specific application, and the clock frequency is reduced to save most dynamic power consumption due to unnecessary flipping of a clock; when the chip does not need to process tasks, the chip chooses to work in the low-power working mode, in the low-power working mode, the clock or power supplies in certain regions inside the chip can automatically turn off, and further the dynamic power consumption and the static power consumption are saved. According to the low-power design method for the wireless sensor network core chip, unnecessary power consumption can be reduced substantially whenever the chip works or sleeps, the service life of batteries is prolonged for wireless sensor network nodes, very important significance for power consumption reduction under the condition that the correct working of the wireless sensor network nodes is guaranteed is achieved.

The invention discloses a method for designing System on a Chip (SOC) chips with low power consumption for a wireless local area network. The method is invented based on the operating mode and characteristics of the SOC chip for the wireless local area network. The method not only reduces dynamic power consumption of the chip, but also further reduces static power consumption of the chip, thereby solving the pressure of ever-increasing static power consumption of chips in a deep sub-micron process.

A semiconductor waveguide includes a section containing free charge, either electrons or holes, which can be steered into or removed from the path of the beam under the control of electrical signals. The mobile charges come from a potential well which may be either filled or depleted under electrical control. When the well is filled, the charges speed the beam propagation, introducing a phase change. When the well is emptied the beam propagates with extra delay. The phase shifter allows very high speed modulation of the beam using low voltage and low power electronics. The device can be created using standard silicon processing techniques, and integrated with other optical components such as splitters and combiners to create amplitude modulators, attenuators and other optical devices.

A method of operating a programmable logic device includes the steps of using a full VDD supply voltage to operate a first set of active blocks of the programmable logic device, and using a reduced supply voltage (e.g., 0.9 VDD) to operate a second set of active blocks of the programmable logic device. A timing analysis is performed to determine the maximum available timing slack in each active block. Active blocks having a smaller timing slack are grouped in the first set, and are coupled to receive the full VDD supply voltage. Active blocks having a larger timing slack are grouped in the second set, and are coupled to receive the reduced VDD supply voltage. As a result, the active blocks in the second set exhibit reduced power consumption, without adversely affecting the overall speed of the programmable logic device.

A transmitter architecture having a single signal path or hardware to cover WCDMA / EDGE / GSM applications, and requires no SAW at the transmitter outputs. The transmitter architecture allows for a transmit convergence feature. A passive mixer with unique driver and furthermore using native devices available from the CMOS process for the mixer cores enables low voltage and low power design, low output noise and high linearity. A digital variable gain amplifier has the capability to cover wide output dynamic range operated from low supply voltage and interfaced digitally with the baseband circuit without DAC. A single transformer is used to combine the outputs from the WCDMA / EDGE and GSM drivers and subsequently convert the differential signal paths into a single-ended signal. RF switches are used to divert the output from the transformer to different bands and applications.

The invention discloses a method for detecting stress field of a hoist drum and a device thereof, and belongs to the detection methods and detection devices of drum stress field. In the device, a damper brake holder is positioned at the outside of the hoist drum, a wireless stress sensor node is fixed on the hoist drum, an anchor node is fixed on the damper brake holder, a sink node is fixed on the housing of a hoist operating console, and the sink node is connected with an industrial computer by a USB interface. The detection method and the device have the advantages of no any potential safety hazard to a hoisting system, being safe and reliable; very high communication rate and communication reliability and quick response speed to the system due to the use of UWB wireless communication technology; good operation conditions and convenient mounting and maintenance of the sensor node; low power consumption design of the wireless sensor node by which two AA batteries can be used for one year and which solves the power supply problem; and a self-diagnostic function of the sensor node, which facilitate to inform maintenance personnel to replace the sensor node or the batteries in time when the sensor node is damaged or the batteries run down.

The subject invention provides materials and methods of fabricating and using an electrochemical biosensor for continuous detection of biological analytes. In a specific embodiment, the biosensor detects a given analyte when the analyte binds with a molecularly imprinted polymer (MIP) matrix immobilized atop a sensing substrate eliminating the need for a redox probing agent commonly found in electrochemical biosensors. Furthermore, the detection sensitivity of the biosensor is enhanced by modifying the electrode surface with a plurality of nanoscopic metallic structures. Advantageously, technologies provided herein can be used in a variety of low-power electronics for wearable applications.

The invention discloses an insulator haze and pollution flashover online monitoring system and method. The system comprises a monitoring terminal and a monitoring device. Currents of a capacitance medium and leaked currents of an insulator are obtained through measurement at first; two signals of a single chip microcomputer are adopted and undergo computing of a formula with a solidified program to obtain a flashover value representing insulator arc-over; the flashover value is compared with a given threshold value and whether two classes of flashover alarms 'caution or danger' are given or not is judged according to a comparison result; a program for monitoring a mainframe is used for displaying a real-time monitoring result and a history data curve on a man-machine interface. On one hand, the haze and the pollution degree can be known by people in a duty room, on the other hand, a GSM short message module and a wireless communication manner are adopted for saving trouble due to remote communication and laying of wires; solar energy and a storage battery are used for supplying power and a high-voltage pulse generation manner and the low-power-consumption design are adopted for ensuring that the equipment can operate in an all-weather mode.

The invention discloses a sub-threshold reference source compensated by adopting electric resistance temperature, which belongs to a range of power supply temperature compensating circuits. The sub-threshold reference source adopts positive temperature coefficient compensating circuit and temperature compensating reference voltage source technology of electric resistance, and consists of three parts comprising a peak current mirror, a negative temperature coefficient current generating circuit and a reference voltage output circuit. A sub-threshold reference circuit for generating constant reference voltage output by using the positive temperature coefficient of the electric resistance and the negative temperature coefficient of the current on a resistor can overcome the influence that the output voltage brought by channel length modulation effect is changed by the fluctuation of power supply voltage to a certain degree; and the sub-threshold reference source has a simple structure and low power consumption, can be applied to an analog integrated circuit with low-power consumption design, and can be broadly applied to a reference voltage source circuit required by a low-power consumption analog and digital-analog mixed circuit for generating low temperature coefficients.

The invention belongs to the technical field of new energy, and relates to a rotary piezoelectric power generation charger driven by wind force. The rotary piezoelectric power generation charger is used for collecting wind energy in environments and converting the wind energy into electric energy. The rotary piezoelectric power generation charger comprises a rotary piezoelectric power generation assembly, an interface processing circuit and a rechargeable battery. Piezoelectric crystal layers and metal neutral layers of the rotary piezoelectric power generation assembly form piezoelectric double-crystal beams, and the piezoelectric double-crystal beams are distributed around a spindle to form a circumferential array and are fixed onto a body of a motor by the aid of fixtures. The interface processing circuit comprises a rectifier circuit, a voltage regulating circuit and a battery charging circuit. The rotary piezoelectric power generation charger has the advantages that the piezoelectric power generation charger is simple in structure and low in manufacturing cost, and is clean and pollution-free; the quantity of peripheral electronic components required by the interface processing circuit is low, a design principle of low power consumption is met, and the interface processing circuit can be integrated easily, has an over-charge and over-discharge protection function and is high in stability; the piezoelectric power generation charger is applicable to low-speed wind energy and can be used with sensor nodes.

The invention discloses a battery charging management device under the shutdown state and a method thereof, and the method comprises the charging starting management step under the shutdown state and the charging finish management step after full charging. The charging starting management step comprises the following steps: A1 after each time of full charging and switching the power supply switching circuit to the interruption state, timing is started; B1, when the counted time reaches a first time, the electrical source manage circuit controls the electrical switching circuit to be the turn-on state, so as to communicate the battery module with the electrical source. The invention also discloses a method for managing battery charging. The invention facilitates battery charging management to become simple under the shutdown state and realizes the low-power consumption design under the shutdown state.

This invention relates to a low-power electronic current transformer, and is the equipment without power source. It includes primary winding, secondary winding, magnet core, secondary shunt resistance, screen cover, double-screen multiple twin and base frame. The primary winding passes through the center of the magnet core, the secondary brown lead circles around the magnet core evenly, the screen cover and the base frame integrate together, a secondary shunt resistance connects with the end of the secondary brown lead, and the secondary shunt resistance also circles evenly around the secondary winding composed of magnet core and the secondary brown lead, the whole secondary winding is put in the screen cover, the secondary low-power voltage is output by the double-screen multiple twin. The secondary output of this invention is the low-power voltage signal that has linearity proportion relation with the primary current; a transformer winding can meet all kinds of demands of measurement and protection at the same time; the measuring distance is far, the precision is high; it does not have the secondary loop problem, it is open-circuit and short-circuit, and the weight is light, the cost of materials is low and the magnetic compatibility is strong.

The invention provides a low-power intelligent agricultural data acquisition system implemented based on NB-IoT, comprising a data acquisition terminal, an NB-IoT master controller, a data center server and a management client. The master controller of the system adopts a wireless communication part based on an NB-IoT protocol and has a low-power design, the communication transmission can be performed with strong reliability and low costs, the power consumption of the master controller located in an agricultural production site can be further reduced, the standby time can be greatly extended,and the number of times of battery replacements can be reduced. The scheme of the invention designs an embedded system based on multi-layer components for the master controller, and forms a functionalarchitecture that can be packaged, standardized and reused and has embedded characteristics; and according to the scheme of the invention, a monitoring module for realizing data communication with the master controller and a management module for realizing farmland scene state display, fault alarm, data statistics, report generation and user management are configured for the data center server.

The invention relates to a routing mobile phone with the wireless routing function. A wireless router 2 is designed to be low in power consumption, is specially used for connecting close-range application devices 4 near the routing mobile phone 7 into the human body network 6 and conducting routing towards a cellular communication network 3 and a broadband router 5 through a smart phone 1 and is connected into a cloud center 8. The wireless router 2 both has the function of a wireless AP and the function of a router and comprises a routing module 2.1, a WAN port 2.2, an LAN port 2.3, a bus 2.6, an RF module 2.4 and an antenna 2.5. According to the mobile phone-borne wireless routing system for the human body network, due to the fact that the routing mobile phone 7 is networked with the close-range application devices 4, real-time online operation is achieved, the existing point-to-point connection between mobile phones and intelligent equipment is changed, the original information isolated island is changed into information sharing, a qualitative leap of application is achieved, and the mobile phone-borne wireless routing system for the human body network has great significance in achieving the Internet of Things IoT and improving the living quality of people.