1351 results about "Ultra low power" patented technology

The present invention provides a system and method for obtaining in vivo images. The system contains an imaging system and an ultra low power radio frequency transmitter for transmitting signals from the CMOS imaging camera to a receiving system located outside a patient. The imaging system includes at least one CMOS imaging camera, at least one illumination source for illuminating an in vivo site and an optical system for imaging the in vivo site onto the CMOS imaging camera.

Devices, systems and methods are disclosed for additional security, functionality, and convenience in the operation of a wireless communication device with the use of a separate proximity security token in communication with the wireless communication device. In exemplary embodiments, the token is carried by the user while device logic is installed on the user's wireless communication device. The device logic along with transceivers allows the device to sense proximity of the token through wireless communication. Given a certain range of the proximity security token, as determined by the wireless signal strength, the device logic determines whether the device is in a locked or unlocked state. If the proximity security token is outside the range, then the device is locked. The proximity security token uses ultra low power communications for optimal battery life.

A non-electrode-lead ultra-thin flexible micro multifunctional heart rate adjusting device comprises an integrative ultra-thin flexible micro non-electrode-lead pacemaker formed by assembling a micro battery, an ultra-low-power source circuit, a wireless receiving / transmitting circuit and an application circuit unit together, the needle electrodes are positioned on one side of the pacemaker and all of them form a small electrode body which can directly implanted into heart or external surface of heart; a multifunctional microcomputer heart rate adjusting remote controller connects with various non-electrode-lead pacemakers via wireless communication; the non-electrode-lead pacemakers and / or the heart rate adjusting remote controller connect with a control base station via wireless network, and the control base station connects with a computer.

A system for improving the power efficiency of an electronic device includes a threshold voltage selector and a supply voltage selector. The threshold voltage selector selects a value of a threshold voltage for operation of the device in response to a present operating condition of the device. The supply voltage selector selects a value of a supply voltage to be applied to the device in response to the present operating condition of the device. The value of the threshold voltage and the value of the supply voltage control a power consumption of the device.

An apparatus and method for waking up a main processor (MP) in a low power or ultra-low power device preferably includes the MP, and a sub-processor (SP) that utilizes less power than the MP to monitor ambient conditions than the MP, and may be internalized in the MP. The MP and SP can remain in a sleep mode while an interrupt sensor monitors for changes in the ambient environment. A sensor is preferably an interrupt-type sensor, as opposed to polling-type sensors conventionally used to detect ambient changes. The MP and SP may remain in sleep mode, as a low-power or an ultra-low power interrupt sensor operates with the SP being in sleep mode, and awakens the SP via an interrupt indicating a detected change. The SP then wakes the MP after comparing data from the interrupt sensor with values in storage or with another sensor.

An ultra low power, low complexity, low collision, deterministic modulation method that also works as a massive medium access mechanism for communication systems is based on positioning data in a communication resource space, such as time and frequency, such that the position of a symbol in that space determines its value and its access to the medium. The number base of the symbol is determined by the size of the subset of the resource space it is positioning itself in and, thereby, a few sparsely located symbols can convey a large value, while the remainder of the space can be simultaneously and massively used by other sparsely resource using members of the network.

Provided is a Web of Things smart power grid operation and maintenance system. The Web of Things smart power grid operation and maintenance system comprises a front end integration monitoring device, a power supply device, a monitoring host machine and a monitoring center, the monitoring host machine is in charge of receiving collection data sent back by the front end monitoring device, and filtering, temporary storing and uploading the received data to a database server of the monitoring center, and meanwhile in charge of receiving, analyzing, and distributing commands issued by the monitoring center, the database server, a streaming media server and an application server of the monitoring center are all communicated with the monitoring host machine through a wireless network gateway, a Web of Things smart power grid operation and maintenance platform is operated on an application terminal, and the Web of Things smart power grid operation and maintenance platform comprises an electronic map, a monitoring alarm module, a device failure alarm module, an action with alarm module, a device management module and a statistic analysis module. The Web of Things smart power grid operation and maintenance system has the advantages of being small in size, light in weight, convenient to install, ultra-low in power consumption, and high in automation degree and intelligent degree.

Provided is a high-speed and ultra-low-power-consumption nonvolatile memory having a high temperature stability at a zero magnetic field. In a tunnel magnetoresistive film constituting a nonvolatile magnetic memory that employs a writing method using a spin-transfer torque, an insulating layer and a nonmagnetic conductive layer are stacked above a ferromagnetic free layer.

An apparatus and method for waking up a main processor (MP) in a low power or ultra-low power device preferably includes the MP, and a sub-processor (SP) that utilizes less power than the MP to monitor ambient conditions than the MP, and may be internalized in the MP. The MP and SP can remain in a sleep mode while an interrupt sensor monitors for changes in the ambient environment. A sensor is preferably an interrupt-type sensor, as opposed to polling-type sensors conventionally used to detect ambient changes. The MP and SP may remain in sleep mode, as a low-power or an ultra-low power interrupt sensor operates with the SP being in sleep mode, and awakens the SP via an interrupt indicating a detected change. The SP then wakes the MP after comparing data from the interrupt sensor with values in storage or with another sensor.

The invention discloses a wireless intelligent sensor network protocol (ATZGB-SleepTree) with ultra-low power consumption. The protocol includes a physical layer, an MAC (media access control) layer, a link layer, a network layer and an application layer according to an OSI (open system interconnection) reference model. A traditional wireless sensor protocol and even an existing ZigBee protocol are quite difficult to meet the requirements of low power consumption, low cost, high fault tolerance and the like of a wireless sensor, and under the circumstance, the ATZGB-SleepTree protocol arises at the historic moment. The ATZGB-SleepTree constructs a wireless network which is low in cost and power consumption, high in sensitivity, reliability and real-time control and transmission, highly flexible in work pattern and configuration, automated in link management, capable of achieving AES (advanced encryption standard) data encryption, supportive to multiple bands and multiple wireless rates and capable of achieving synchronous sleep and synchronous wake-up of all nodes of the whole network, routing fault-tolerance and automatic recovery and is used for substituting for traditional wireless and cable network transmission modes.

The invention relates to a control system and method for an electronic device. The control system is composed of a plurality of independent sensing units attached to a plurality of fingers, a signal processor and an interface module, wherein each sensing unit at least comprises a three-dimensional gravity acceleration sensor or a three-dimensional gyroscope sensor which is used for respectively obtaining the acceleration or angle of the corresponding finger; the signal processor is used for processing and comparing the collected acceleration and angle data, so as to analyze the actions of the fingers; and then the analyzed finger actions are converted into electronic signals and information which can be identified by the electronic device; and finally, the electronic signals and information are input into the electronic device by the interface module to control the electronic device. The control system and method provided by the invention are not limited by space, ultralow in power consumption, portable, convenient to learn and use and suitable for various electronic devices.

The present invention discloses a low load wireless sensor network MAC layer monitoring and resenting method comprising synchronous scheduling list phase of establishing node and node normal work phase of adopting EmMAC work mechanism; the node starts the radio frequency to detect channel in the normal work phase when arouses the timer to trigger, if the transmitting node is to transmit the data, so the transmitting node must waken before the EmMAC period; the EmMAC work mechanism divides the MAC layer into CSMA delamination and EmMAC delamination; the present invention uses synchronous sleep arousing mechanism, short preamble packet, fake preamble domain mechanism and two stage channel carrier to monitor through the whole network node so as to reduce the free time of the node and increase the sleep time; synchronously, the scheduling list only records the left time domain of the node and leads all kinds of low consumption technologies such as collision avoidance, overtime work, overhearing avoidance and so on when receives the data so as to greatly improve the energy saving ration of the present invention and achieve the design object of ultra-low-power.

Certain embodiments of the invention may be found in an ultra low power dosimeter assembly. The ultra low power dosimeter assembly may comprise a low power voltage source and a table circuit. The table circuit may be adapted to convert an input voltage to a second voltage level. The second voltage level may correspond to noise dose. The ultra low power dosimeter assembly may also comprise a switch adapted to trigger a control circuit. The control circuit may provide progressive attenuation of an output signal as the second voltage level increases. In certain embodiments, the control circuit may also be adapted to send one or more warning signals to a user of the ultra low power dosimeter. The one or more warning signals may be sent when the control circuit determines the second voltage level has reached one or more pre-determined threshold voltage levels.

The invention provides a clock synchronization method among wireless network devices. The method comprises the steps that 1, a clock source device and at least one clock slave device are in network interconnection; 2, the clock source device obtains a reference clock, and the clock slave devices obtain unsynchronized reference clocks; 3, the clock source device interacts clock information with the clock slave devices through clock synchronization frames; 4, the clock source device transmits information containing the frequency and phase of the reference clock to the clock slave devices; the CPU processors in the clock slave devices calculate the reference clock of the clock source device and calibrate own reference clocks according to the reference clock; and the clock synchronization among the wireless network devices is realized through the steps. The synchronized reference clock can be used for synchronous scheduling of CPU system tasks, synchronous control of performance of instructions, high-precision synchronous measurement of external signals and synchronous measurement of high-speed moving objects, basic wireless take scheduling can be satisfied, and the synchronous awakening tasks of the devices in an ultra low-power-consumption application can be satisfied.

Processor-management techniques that purposely alternate a processor between an operating state and a non-operating state while the processor is executing the workload. The techniques leverage the “ultra-low-power” non-operating states of many processors to provide predictable power and / or frequency control of the processor. These techniques can provide better performance than known clock-throttling and dynamic voltage and frequency scaling schemes for controlling processors.

An energy-efficient photoreceptor apparatus and a transimpedance amplifier apparatus having high energy-efficiency and low power consumption of which are achieved through multiple distributed gain amplification stages, adaptive loop gain control circuitry and unilateralization, thereby enabling fast and precise performance over a wide range of input-current levels. The high-energy efficiency, robust feedback stability and performance of the present invention can be utilized to achieve sub-milliwatt pulse oximeters and may be employed in other current-to-voltage amplification and conversion applications. The use of analog processing on the outputs of the photoreceptor apparatus also helps lower the overall power of pulse oximeters.

The invention relates to the data communication technology field and especially relates to a mobile-terminal ultra-low power consumption and high safety communication method and a high-safety online payment method. The mobile-terminal ultra-low power consumption and high safety communication method comprises the following steps that a standard verification information of a user is prefabricated in a SIM unit of a mobile terminal; when a first communication module in the mobile terminal receives an identity verification request, an identity information acquisition module of the mobile terminal acquires identity information of a current user; whether the identity information matches with the standard verification information is determined, and a determination result is formed and output.

The present invention provides an ultra-low power embedded CMOS temperature sensor based on serially connected subthreshold MOS operation particularly well suited for passive RFID food monitoring applications. Employing serially connected subthreshold MOS as sensing element enables reduced minimum supply voltage for further power reduction, which is very important in passive RFID applications. The temperature sensor may be part of a passive RFID tag and incorporates a temperature sensor core, proportional-to-absolute-temperature (PTAT) and complimentary-to-absolute-temperature (CTAT) delay generators, and a time-to-digital differential readout circuit. In one embodiment, the sensor is embedded inside a passive UHF RFID tag fabricated with a conventional 0.18 μm 1P6M CMOS process. With the sensor core working under 0.5 V and digital interfacing under 1 V, the sensor dissipates a measured total power of 119 nW at 33 samples / s and achieves an inaccuracy of +1 / −0.8° C. from −10° C. to 30° C. after calibration.

The invention discloses a dynamic compensation circuit with ultra-low power consumption and a linear regulator with the same. The dynamic compensation circuit comprises a dynamic compensation module, a current output detection module and a control module. In the linear regulator applied with the dynamic compensation circuit with ultra-low power consumption, the dynamic compensation circuit with ultra-low power consumption is connected between the output end of an error amplifier and the output end of the linear regulator. The dynamic compensation circuit with ultra-low power consumption and a linear regulator with the same of the invention have very simple structures and practicality, can effectively ensure the stable work under the application condition of a variety of output load. The dynamic compensation circuit only has ultra-low power consumption less than 1mu A, and reduces the cost of production and application of chips due to the small occupied chip area. The dynamic compensation circuit with ultra-low power consumption and the linear regulator with the same of the invention are widely applicable to power management application process.

Methods and systems are provided for ultra-low-power adaptive, user independent, voice triggering in electronic devices. A voice trigger, which may be configured as ultra-low-power function, may be run in an electronic device, when the electronic device transitions to a power-saving state, and may be used to control the electronic device based on audio inputs. The controlling may comprise capturing an audio input, and processing the audio input to determine when the audio input corresponds to a triggering command, to trigger transitioning of the electronic device from the power-saving state. The processing of audio input, to determine that it corresponds to the triggering command, may be based on use of an adaptively configured state machine. The state machine may be based on a Hidden Markov Model (HMM), and may be configured as a two-dimensional state machine that comprises plurality of lines of incantations, each of which corresponding to the triggering command.

Methods and devices for a miniature, ultra-low power impact recorder for detecting, quantifying and recording the energy of an explosive blast or ballistic projectile impact. In one embodiment, the impact recorder can included a sensor comprised of an array of electromechanical resonators that is sensitive to the vibrations produced in selected, discrete frequency ranges that approximate the spectral signature characteristics of the shockwave resulting from the ballistic impact event, even after traveling through impacted material or body tissues.

Provided is an ultra low-power wake-up receiver capable of reducing an operating time of an analog receiver by controlling operation on / off of the analog receiver according to a clock signal from a digital receiver in an amplitude-shift keying (ASK) or on-off keying (OOK) radio receiver. The ultra low-power wake-up receiver includes: a clock generator generating a clock signal having a predetermined frequency; an operation controller controlling analog operation-on for a predetermined time according to the clock signal from the clock generator; an analog receiver maintaining an operation-on state for a predetermined time according to the analog operation-on control performed by the operation controller, and being operated off after the predetermined time; and a digital receiver being operated on while the analog receiver maintains the operation-on state

The invention discloses a quasi-zero power consumption standby control circuit device. The quasi-zero power consumption standby control circuit device is arranged between a power supply and an electrical device and comprises a main power supply, an auxiliary power supply and a main control chip. An input end of the main power supply is directly connected with the power supply, and an output end of the main power supply is connected to the main control chip and used for supplying power to the main control chip; an input end of the auxiliary power supply is connected to the power supply through a control switch, and an output end of the auxiliary power supply is connected with a load in the electrical device; a first control end of the main control chip is connected with the control switch and used for controlling the control switch to be turned on and off. The invention further relates to a control method applied to the control circuit device. Through the mode of independent power supply to a high-power load circuit, a small-specification power supply can serve as the main power supply, extremely high efficiency can be kept during a light load, the main power supply is extremely small in load during standby time, and accordingly ultra-low power consumption during the standby time is achieved.

The invention discloses an ultra-low power consumption indoor and outdoor hybrid positioning system. The system comprises a plurality of iBeacon base stations which are arranged indoors and broadcast general unique identification codes through Bluetooth by preset signal intensities; a positioning node, wherein the positioning node is arranged on a moving object to be positioned, periodically monitors the plurality of general unique identification codes and the corresponding signal intensities around the positioning node through Bluetooth and outputs the monitored result by means of LoRa; a wireless gateway used for receiving the plurality of general unique identification codes and the signal intensity information and outputting the plurality of general unique identification codes and the signal intensity information through a mobile network; and a cloud platform used for receiving the plurality of general unique identification codes and the signal intensities and determining the latitude, longitude and indoor position of the moving object. According to the invention, by adopting the iBeacon technology based on Bluetooth indoors and adopting a GNSS positioning technology outdoors, precise positioning and seamless switching are realized, low power consumption and long distance transmission is realized by means of the LPWAN gateway, the positioning precision is high, the power consumption is low, the distance is long, and the system is suitable for large-scale popularization and application.

Methods and devices for monitoring intra-ocular pressure of a patient using a miniature implantable sensor device are provided herein. Methods include obtaining multiple pressure measurements each day during an increment of an extended monitoring period according to a sampling program and wirelessly transmitting stored measurement data and wirelessly charging the device. Measurements and data process is performed with low power requirements such that sampling can be performed hourly for at least one week using energy stored on the miniature device and measurement data can be transmitted and the device charged rapidly when an external portable data acquisition / charging device is held in proximity to the device. In one aspect, methods include switching between differing use modes and powering the sampling device with a high impedance battery by switching between a supercapacitor and the battery with a microcontroller to perform impedance conversion.

A family of bandgap embodiments are disclosed herein, capable of operating with very low currents and low power supply voltages, using neither any custom devices nor any special manufacturing technology, and fabricated on mainstream standard digital CMOS processes. As such, manufacturing cost can be kept low, manufacturing yields of digital CMOS system-on-a-chip (SOC) that require a reference can be kept optimal, and manufacturing risk can be minimized due to its flexibility with respect to fabrication process node-portability. Although the embodiments disclosed herein use novel techniques to achieve accurate operations with low power and low voltage, this family of bandgaps also uses parasitic bipolar junction transistors (BJT) available in low cost digital CMOS process to generate proportional and complementary to absolute temperature (PTAT and CTAT) voltages via the base-emitter voltage (VEB) of BJTs and scaling VEB differential pairs to generate the BJTs thermal voltage (VT).

The present invention provides a solution to avoid the robustness problems of sub-threshold circuits by switching small parts of circuits to nominal-voltage only when they are being used, and switching them back to sub-threshold levels when the operation finishes. Such “hybrid sub-threshold” approach is capable of supporting ultra-low power operation without the disadvantages of sub-threshold circuits.

The invention relates to a piezoelectric switch type valve positioner control method and a piezoelectric switch type valve positioner control system. The system consists of a 4-20mA current source, a current-to-voltage (I / V) conversion circuit, a voltage conversion module, a control signal amplifying and filtering circuit, a feedback signal amplifying and filtering circuit, 2 external analog-to-digital converter (ADC), an ultra-low power consumption singlechip, a liquid crystal keyboard module, an electrically erasable programmable read-only memory (EEPROM), a passive crystal, and a piezoelectric valve driven amplifying circuit. The control method comprises the steps of: determining the optimum pulse width modulation (PWM) duty cycle during the self-tuning of parameters; and adopting a five-step switching method with reverse PWM during the control. The piezoelectric switch type valve positioner control method and the piezoelectric switch type valve positioner control system can effectively avoid the overshoot phenomenon during the control of a valve positioner, solve the non-linear problem of an actuating mechanism, and have stronger universal applicability.

A system for energy management using a plurality or remote sensor devices. The system includes a plurality of sensor device spatially disposed in one or more regions of a building structure. The sensor device comprises a sensor element coupled to a transmitter device, which can be selected from a format including Zigbee, Zwave, 6-LoWPAN, Ultra-Low-Power WiFi, RFID, Bluetooth, or others. The system also has a gateway apparatus.