57results about How to "Low power design" patented technology

The invention discloses a dual bootstrap and voltage compensation technology-based A / D converter sampling switch, which comprises a primary switch unit used for a to-be-sampled signal channel to sample to-be-sampled signals, a underlayer voltage bootstrap unit for realizing the underlayer voltage bootstrap of a switching tube PMOS Switch in the primary switch unit, a grid voltage bootstrap unit for realizing the grid voltage bootstrap of the switching tube PMOS Switch in the primary switch unit, a storage unit for parallelly sampling input signals VIN and realizing the temporary storage of a VIN voltage, and a voltage compensation unit for compensating the sampling output voltage of an output end VOUT. The invention provides a sampling switch which is capable of working at low voltage and low power consumption and is insensitive to process errors. Meanwhile, the adopted voltage self-compensation method effectively solves a nonlinear problem caused by clock feedthrough occurring after the grid voltage bootstrap of the switching tube.

The invention belongs to the technical field of analog-digital converters, and particularly relates to a capacitive nonlinear calibration circuit of a bit-by-bit approximation analog-digital converter and a method. The circuit structurally comprises a digital-analog converter, a clock control circuit, a calibration logic control circuit, an error measurement and storage circuit, a summator logic circuit, a comparator circuit and a bit-by-bit approximation analog-digital converter logic circuit. The method comprises the steps that the calibration logic control circuit is switched on, the analog-digital converter starts to carry out error measurement, and the error measurement and storage circuit calculates and stores the error factors of capacitors on all bits respectively; after the error factors are all stored, the calibration logic control circuit is switched off, and the analog-digital converter adds output codes and the error factors through the summator to obtain the final calibration output code. The capacitive nonlinear calibration circuit and the method are suitable for the high-precision low-power-consumption bit-by-bit approximation analog-digital converter, and mainly have the advantage that under the condition of not adding extra analog circuits, nonlinear errors caused by stray capacitors and capacitor array mistaching in a calibration capacitor array and hardware and power consumption cost are low.

The present invention provides a system, apparatus and method for modularly adapting a network node architecture to function in one of a plurality of potential node types. The architecture includes a configurable switching element, integrated optics, and a plurality of modules that allow a “type” of node to be adapted and configured within the base architecture. The module interfaces may be optical or electrical and be used to construct various different types of nodes including regenerators, add / drop nodes, terminal nodes, and multi-way nodes using the same base architecture.

An encephaloelectric signal amplifier for the portable event associated electrocortical potential instrument is composed of cerebral electrodes, encephaloelectric signal preamplifier, main frequency trap circuit, band-pass filtering amplifier, 16 embedded A / D converters, polarity switch and synchronous controller MCU. It can precisely acquire the bioelectric signals of human nerve, filter and amplify them, and record them at real time.

The invention discloses a GIS bus cylinder telescopic joint displacement monitoring device and a GIS bus cylinder telescopic joint displacement monitoring method. The monitoring device comprises an ejector rod, a shell, a main control panel, a connecting block, a pressure spring and a positioning rod. The main control panel comprises a potentiometer, a control circuit, a temperature sensor, an acceleration sensor, a voltage reference source, a memory, a real-time clock, a positioning module, a wireless communication module, a power management circuit, a storage battery, a primary battery and a power interface. The potentiometer and a bus cylinder telescopic joint are linked, and the control circuit is used for measuring the stroke displacement amount of the potentiometer. According to the technical scheme of the invention, the parameters of the telescopic joint, including the displacement, the inclination, the vibration, the environment temperature and the like, can be automatically monitored, recorded and remotely transmitted.

An integrated circuit, such as a memory macro, includes multiple power rails supporting first and second voltage differentials, with the second voltage differential being smaller than the first voltage differential. Signal lines in the integrated circuit are driven with the small voltage swing, which is generated by small swing circuits. The integrated circuit further includes regeneration circuits, which are receiving small voltage swing inputs and are outputting first, or full voltage swings. The application of the small voltage swing to the signal lines saves power in the integrated circuit. A wide bandwidth, full-wordline I / O, memory integrated circuit has simultaneously operable connection paths between essentially all the memory cells that are attached to the same wordline and the corresponding I / O terminals, and it has a single ended data-line structure.

A temperature compensated CMOS RC oscillator circuit changes the source-bulk voltage to stabilize the MOSFET's threshold voltage variation over temperature using a resistor and temperature-correlated bias current. The MOSFET's source is connected to ground through a resistor. This temperature-correlated bias current also runs through this resistor. When temperature increases, the bias current also increases, which increases the MOSFET's source-bulk voltage. The increased source-bulk voltage helps to stabilize the threshold voltage of MOSFET at high temperature. A power saving logic is also embedded in this oscillator to achieve higher frequency at lower power consumption. In the present invention, there is no high gain op amp or high speed comparator, which makes the resultant oscillator to be low power design and which can be integrated into a single chip with other system.

A portable event associated electrocortical potential instrument for taking the event associated encephaloelectric ERP signals and analyzing them to obtain the actual reaction of the event in brain is composed of cerebral electrodes, encephaloelectric signal amplifier, 16 A / D converters, synchronous controller MCU for reading the data of 16í‡8 channels, notebook computer, and body stimulator.

The present invention provides a failure current limitator thyristor electronic board. The thyristor electronic board TE provided in the invention has the following functional characteristics: 1) strong anti-electromagnetic interference capability; 2) the thyristor electronic board TE has low power consumption; 3) special thyristor trigger and on-line monitor method are adopted. The organic combination of these functional characteristics can realize failure current limitator thyristor valve trigger and on-line monitoring perfectly with reliable operation, high stability and strong anti-interference capability.

The invention provides an SAR system based on a frequency modulated continuous wave (FMCW) system, comprising a transceiving antenna, a radio frequency module, a digital module and an image processingmodule, the radio frequency module is connected to the transceiving antenna and comprises a transmitting channel, a receiving channel, a frequency source and a power amplifier module; the digital module is connected to the radio frequency module and comprises a control module, a time service module, an AD module and a DA module and a record module; and the image processing module is connected tothe digital module and comprises a motion compensation module and an imaging processing module. The SAR system is built by adopting the FMCW system, main performance parameters of the system are designed based on the FMCW system, the advantages of simple system structure, small size, light weight and low cost are met, and the SAR system also has relatively high range resolution. Meanwhile, the actual application requirement is combined, and a processing method of the radar system is designed, so as to adapt to application requirements in many fields such as military reconnaissance, geologicalexploration, topographic mapping, ocean exploration as well as agriculture and forestry reconnaissance.

The invention discloses a device, a system, and a method for monitoring oil depot fuel leakage based on wireless sensing. The device comprises a measurement and control and communication module, a gas collecting device, a mechanical structure, and a power module. The measurement and control and communication module which comprises an integrated photoionization sensor and temperature sensor combination for detecting fuel volatile gas controls the gas collecting device, and detects oil gas concentration around an oil tank periodically and sends monitoring information in a wireless manner. The system and the application method use a device as a node, and a plurality of nodes are arranged around an oil tank, so as to form a detection network. Two adjacent nodes of any node in the nodes can communicate directly, and a main node on a valve region is responsible for determining abnormal information reported by the nodes and reporting the abnormal information to a monitoring center. The device, the method, and the system are advantaged in that a wireless sensor network method is used to monitor oil depot fuel leakage online and give out alarm, power of the device is supplied by a cell charged by solar energy, the device is designed and managed in low power consumption and low operating voltage, and is designed to be sealed, so as to achieve operation requirement of safe, reliable, and energy-saving.

Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.

An object of the present invention is to provide an electroacoustic transducer having a multi-channel diaphragm, and a hearing aid using the electroacoustic transducer, in which a plurality of channels having different resonant frequencies is formed in the diaphragm using MEMS technology, thus more closely approximating the different audible frequency characteristics of respective persons. The present invention provides an electroacoustic transducer provided with a multi-channel diaphragm. The electroacoustic transducer includes a diaphragm (110) and signal conversion units (120). The diaphragm is provided with respective channels having different resonant frequencies. The signal conversion units are attached to surfaces channels of the channels, or are arranged to be spaced apart from the surfaces of the channels at a predetermined interval, the signal conversion units converting vibration received from the channels into acoustic signals, or transmitting acoustic signals to the diaphragm and converting the acoustic signals into vibration.

The invention relates to a supermarket shopping trolley electronic anti-theft system which comprises a car electronic anti-theft device and a controlling center, wherein, the car electronic anti-theft device comprises a car MCU central controller, a car GPS module, a car RF receiving / transmitting module, a car acousto-optic alarming circuit, a car voice prompting and alarming circuit, a car working power source, a car power-source monitoring circuit, a controlling circuit and a key; the controlling center comprises a center MCU controller, a center GPS module, a center RF receiving / transmitting module, a communication expansion interface, a center acousto-optic alarming circuit, a center voice prompting and alarming circuit, a center working power source, a center power-source monitoring circuit, a permanent calendar clock, a working keyboard and an LCD information display unit, wherein, the car electronic anti-theft device is communicated with the controlling center through the RF receiving / transmitting module. Compared with the prior art, the invention has the wireless communication function, thereby instantly and dynamically displaying the status of the supermarket shopping trolley so as to prevent the loss.

It is an object of the present invention to form a TFT which is required to have a high withstanding voltage characteristic as well as to lower an off-current, a TFT which is required to have a high withstanding voltage characteristic as well as to raise an on-current, and a TFT in which a short channel structure and the decline in the threshold voltage arising therefrom are attached importance to, on one and the same substrate. A TFT having gate insulating films with different thickness can be formed on one and the same substrate by providing auxiliary electrodes in addition to the gate electrodes over a semiconductor film as well as laminating the insulating films.

The invention discloses an economical and practical embedded freezing and cold storage fresh-keeping and preservation low-intensity magnetic field modularization device which can be applied to refrigerators, intelligent cabinets, wine cabinets, warehouse logistics equipment and the like. The device comprises a coil frame, a magnet exciting coil and a control circuit, the magnet exciting coil is arranged in the coil frame so as to generate a steady low-intensity magnetic field or a pulse steady low-intensity magnetic field; and the control circuit is connected with the magnet exciting coil and used for adjusting the magnetic field intensity of the steady low-intensity magnetic field or the pulse steady low-intensity magnetic field and the magnetic field frequency and the duty ratio of the pulse steady low-intensity magnetic field. According to the device, a small-size coil frame and a small-size wire diameter are adopted, so that the ratio range of the weight of the device to the effective storage volume of embedded equipment is 0.05-0.5 kg / L, the unit volume energy consumption of the embedded equipment is 0.03-5.0 W / L, important factors such as weight, magnetic field intensity and frequency, coil heat dissipation, magnetic field duty ratio and the like are balanced, high-quality and low-energy-consumption freezing and refrigeration of food, medical supplies, agricultural product raw materials, fresh flowers, plant seeds and the like by the magnetic field are kept to the maximum extent.

A signaling apparatus and method are described that use reflected signals to increase the total current delivered to a receiver. Dynamic source-side transmission line termination control is employed to generate reflected signals that constructively add to a nonreflected signal to enhance the signal at the receiver. Switching controls selectively connect and disconnect the transmission line source-side termination resistors to either provide signal termination or remove it. Driver designs using either voltage or current sources for use in signaling systems (including, for example, magnetic storage devices with inductive coil based write heads) are described.

The invention discloses a pulse radio signal generating and transmitting system comprising a digital control back end, a first switch, a second switch, an exciting unit, a primary resonance unit, a coupling unit and a secondary resonance unit, wherein the secondary resonance unit comprises an antenna unit, the digital control back end is connected with the exciting unit through the first switch and is also connected with the coupling unit through the second switch, the exciting unit, the primary resonance unit, the coupling unit and the secondary resonance unit are sequentially and electrically connected, and the digital control back end controls the on-off of the first switch and the second switch, so that the system carries out a switching operation at an isolating state and a coupling state and realizes the transmission of pulse signals. The invention further discloses a control method of the pulse radio signal generating and transmitting system. According to the pulse radio signal generating and transmitting system and the control method of the system, which are disclosed by the invention, no complex semiconductor electronic devices and circuits are provided, the power consumption and the complexity of the system are reduced, the circuits are simple, the design is smart, and the system and the control method are worthy of being popularized and applied.

A method to design low complexity and low power echo and NEXT cancellers based on wordlength reduction technique is presented. A circuit architecture to implement echo and cancellers is also presented. The low complexity and low power design relies on the fact that a TH precoder can be viewed as an IIR filter with an input equal to the sum of the original input to the TH precoder and a compensation signal. The proposed design also relies on the fact that sum of the original input to the TH precoder and the compensation signal has finite levels, which can be represented in less bits than the original input of the echo and NEXT cancellers. An improved design by exploiting the statistics of the compensation signal is also proposed to further bring down the complexity and power consumption of these cancellers.

A simulation apparatus of a semiconductor integrated circuit, capable of measuring power consumption in a higher abstract degree than an RT level and in a high speed, is realized, so that a low power consumption designing operation can be carried out by employing a simulation result. While a cycle base model of a designing subject circuit is arranged by a state control module model, a calculation module model, and a memory model, in the calculation module model, an algorithm description is made; a detailed structure such as a pipeline of hardware is shortcircuited to a calculation to be processed in a unit clock; and a timing shift is absorbed in a wait state of the state control module model, so that a high-speed simulation can be realized. Since such information as an area and a wiring capacitance is added to an activating ratio measurement of a simulation model, power consumption can be measured. A priority arraigning / wiring operation of a function module is carried out based upon this measurement result, and then, a simulation is repeatedly performed so as to execute optimum arranging / wiring operations, so that low power consumption designing can be realized.

A signaling apparatus and method are described that use reflected signals to increase the total current delivered to a receiver. Dynamic source-side transmission line termination control is employed to generate reflected signals that constructively add to a nonreflected signal to enhance the signal at the receiver. Switching controls selectively connect and disconnect the transmission line source-side termination resistors to either provide signal termination or remove it. Driver designs using either voltage or current sources for use in signaling systems (including, for example, magnetic storage devices with inductive coil based write heads) are described.

The invention discloses a zero intermediate frequency receiver based on an FBAR (Film Bulk Acoustic Resonator) and a wireless communication transceiver. The receiver (100) comprises an antenna (101), an FBAR duplexer (102) and a low-noise amplifier LNA (103). An output end of the low-noise amplifier LNA is divided into two parts which are respectively connected with a radio frequency input end of a lower frequency converter (104) in an in-phase signal path I and an orthogonal signal path Q; a local oscillator (109) is connected with the lower frequency converter (104) in the in-phase signal path I and is connected with the lower frequency converter (104) in an orthogonal signal path Q through a 90-degree phase shift device (108); and the in-phase signal path I and the orthogonal signal path Q further comprise a lower frequency converter (104), a transformer (105), a low-pass filter (106) and a variable gain amplifier (107). The wireless communication transceiver comprises a zero intermediate receiver (100) based on the FBAR and a transmitter (116).

The invention relates to the technical field of temperature detection, in particular to a multi-section temperature detection circuit and a temperature detection method. The multi-section temperaturedetection circuit comprises at least two regulation and control units, a comparison unit and a divider resistor string unit. The comparison unit comprises two comparators, the positive-phase input ends of the two comparators are respectively connected to the divider resistor string unit to obtain a divided voltage value, the negative-phase input ends of the two comparators are respectively connected with the two regulation and control units, and the regulation and control units are used for regulating the voltage values of the positive-phase input ends of the two comparators. According to theinvention, the use of a thermistor RTC and a comparator can be reduced, and only one thermistor RTC and two comparators are used, so that the application cost is reduced, the PCB area is reduced, thenumber of pins of an acquisition chip is reduced, and the complexity of an application circuit is reduced; and N switches and N gate end control signals are introduced, the gate end control signals serve as on-off control signals of switches at the same time, the power consumption of the acquisition circuit can be reduced by controlling the acquisition period, and low power consumption is achieved.

The invention provides a wireless communication method and a wireless communication device. The wireless communication method comprises: generating a packet including a first group of wake-up signals.Steps for generating the packet including the first group of wake-up signals include: distributing a sub-channel of a first frequency channel for each of the first group of wake-up signals; using on / off keying OOK modulation to modulate the first group of wake-up signals, wherein each of the first group of wake-up signals is used to activate a main wireless transmitter-receiver device in a corresponding wireless communication device in a first group of wireless communication devices; and through using frequency division multiplexing FDMA, sending the packet, wherein each of the first group ofwake-up signals is sent through the corresponding sub-channel of the first frequency channel. Using the method can transmit wake-up signals of a plurality of wireless communication devices.

The invention discloses a demodulation method and circuit of a signal isolation system. The demodulation circuit comprises a signal conversion geminate transistor, a first current mirror, a second current mirror, a signal recovery circuit and an output stage which are electrically connected in sequence. The signal conversion geminate transistors are used for inputting differential signals and converting the two paths of differential key control voltage signals into two paths of differential key control current signals. The first current mirror is used for copying and outputting the first differential key control current signal. The second current mirror is used for copying and outputting the second path of differential key control current signal. The signal recovery circuit couples the first differential key control current signal and the second differential key control current signal into a demodulation current signal to realize a superposition function of the current signals, and converts the demodulation current signal into a demodulation voltage signal. The output stage module amplifies the demodulation voltage signal into a logic level signal. A modulation voltage signal is converted into a demodulation current signal to be processed, two high-speed comparators are not needed, and low-power-consumption design is achieved.

A method for low power verification of a circuit description comprises minimizing a circuit description by creating a plurality of crossover trees, and evaluating each of the plurality of crossover trees to identify circuit description errors, in particular low power circuit description errors. The minimizing may comprise creating a plurality of crossover trees to represent circuit description, wherein each crossover tree has a unique set of selected ports and gates of the circuit description.