30results about How to "Low power mode" patented technology

A column circuit that amplifies signals read from a sense amplifier array SAA to local input / output lines LIO in sub-amplifiers SAMP to transfer the amplified signals to main input / output lines MIO is provided. A current control circuit IC that can set one of two kinds of currents according to read enable signals RD1, RD2 is provided in each sub-amplifier SAMP. The read enable signals RD1, RD2 are generated at timings corresponding to the number of cycles in burst read operation under control of the timing controller. Current in the current control circuit IC is set to be large by the RD1 in burst read operation cycle just after activation of a memory bank, while current in the current control circuit IC is set to be small by the RD2 in the next and subsequent burst read cycles. Accordingly, expansion of an operation margin or reduction of power consumption can be realized in a semiconductor device including a semiconductor memory such as a DRAM.

The invention provides a wireless soil pressure sensor based on an air pressure monitoring method, and belongs to the technical field of sensing and measurement. The sensor comprises a deformable elastic shell, an integrated module which is composed of a single-chip microcomputer, a wireless transmit-receive unit, an air pressure and temperature sensing unit, a battery and a wireless charging unit, and elastic connecting ropes. When the deformable elastic shell is enabled to deform by soil pressure, the air pressure and temperature sensing unit monitors change of air pressure and temperature in the elastic shell, and the data are transmitted to an external device of the shell by the wireless transmit-receive unit after acquisition of the single-chip microcomputer, temperature compensation and calibration function transformation processing. The internal part of the shell adopts the battery for power supply, and noncontact charging of the battery is performed by utilizing the wireless charging unit without damaging the deformable elastic shell. The wireless soil pressure sensor is widely suitable for soil stress comprehensive monitoring, and the wireless soil pressure sensor is simple in structure, low in cost, convenient to use, high in adaptability, wireless in transmission and wireless in charging and can perform long-term monitoring after one time of embedding so that the problem of soil pressure distribution monitoring can be solved.

Universal serial bus (USB) communication systems and methods are disclosed. In particular, aspects of the present disclosure optimize polling and scheduling of bulk data transfers from bulk endpoints connected through a USB connection. By reducing the amount of polling, and by favoring endpoints that are known to have data to transfer, unnecessary signaling is avoided. Reduction in signaling allows more data to be transferred in a shorter amount of time. Reducing the time required for a data transfer may allow for low power modes to be used, which in turn further saves power.

The present invention provides an RS485 high-efficiency long-distance data transmission system for geophysical exploration, including downlink input RS485 interfaces, downlink output RS485 interfaces, uplink input RS485 interfaces, uplink output RS485 interfaces, FPGA and A / D conversion chip, the downlink input RS485 interface, downlink output RS485 interface and FPGA form a downlink command transmission channel, and the uplink input RS485 interface, uplink output RS485 interface and FPGA form an uplink data transmission channel. The invention also provides a transmission method of an RS485 high-efficiency long-distance data transmission system for geophysical exploration. The invention provides an effective way for the design of the seismic exploration data transmission system; at the same time, by utilizing the controllability of the RS485 transmission rate, it provides an effective low power consumption mode for the seismic exploration instrument system, which can greatly increase the field standby of the exploration instrument Time is of great significance to improving the efficiency of field operations.

The invention provides a wireless soil pressure sensor based on an air pressure monitoring method, and belongs to the technical field of sensing and measurement. The sensor comprises a deformable elastic shell, an integrated module which is composed of a single-chip microcomputer, a wireless transmit-receive unit, an air pressure and temperature sensing unit, a battery and a wireless charging unit, and elastic connecting ropes. When the deformable elastic shell is enabled to deform by soil pressure, the air pressure and temperature sensing unit monitors change of air pressure and temperature in the elastic shell, and the data are transmitted to an external device of the shell by the wireless transmit-receive unit after acquisition of the single-chip microcomputer, temperature compensation and calibration function transformation processing. The internal part of the shell adopts the battery for power supply, and noncontact charging of the battery is performed by utilizing the wireless charging unit without damaging the deformable elastic shell. The wireless soil pressure sensor is widely suitable for soil stress comprehensive monitoring, and the wireless soil pressure sensor is simple in structure, low in cost, convenient to use, high in adaptability, wireless in transmission and wireless in charging and can perform long-term monitoring after one time of embedding so that the problem of soil pressure distribution monitoring can be solved.

The invention discloses a water conservancy remote measurement terminal and a working method thereof. The terminal comprises a microprocessor, and the microprocessor is connected with a clock circuit. The clock circuit is used for providing reference time for the microprocessor. The microprocessor is connected with a power module and a meter reading module. The meter reading module is provided with a power control circuit which is connected with a power port of the communication circuit. The microprocessor controls the on and off of the power of the communication circuit through the on and off of a field effect tube in a power control circuit, thereby achieving the purposes of meter reading and power consumption reduction, effectively reducing the power consumption of the terminal, and achieving the saving of energy for the terminal.

An Active Matrix Organic Light Emitting Diode (AMOLED) display and a method of controlling a display thereof are provided. The AMOLED display includes an input unit, a controller, a display unit for displaying a low power mode screen, by enabling the controller to turn off an AMOLED and to turn on a cholesteric Liquid Crystal Display (LCD) in a low power mode, and for displaying a high picture quality mode screen, by enabling the controller to turn on the AMOLED and to turn off the cholesteric LCD in a high picture quality mode. When used in an indoor environment, the AMOLED display can operate in the high picture quality mode, and when used in an outdoor environment or as an e-book reader, the AMOLED display can operate in the low power mode.

The invention provides a low-power-consumption Bluetooth gateway and a control method, and relates to the field of Bluetooth gateways. A low-power-consumption Bluetooth gateway comprises an arithmetic unit, a temperature sensor, a display, a Bluetooth processor, a power management module and a power supply module, the input of the Bluetooth processor is connected with the temperature sensor, and the output of the Bluetooth processor is connected with the display. The fire early warning module is used for performing fire early warning through the display when the temperature exceeds the preset temperature; the Bluetooth processor is connected with the power supply module through the power supply management module, and the power supply management module is used for switching the Bluetooth processor into a low-power-consumption mode when a power supply is cut off; the output of the arithmetic unit is connected with the Bluetooth processor; the problems of single function, high power consumption and inconvenient control in the prior art can be solved, and safety and stability are good.

The invention provides a bidirectional bus communication circuit which comprises a host device, a plurality of slave devices and buses, wherein the host device is connected with the slave devices via the buses; the host device comprises a host data sending circuit, a host data receiving circuit and a host CPU; and each slave device comprises a slave data sending circuit, a slave data receiving circuit and a slave CPU. The invention further provides a bidirectional bus communication method which comprises the following steps: S1, the host device supplies power for or charges the slave devices; S2, data of the host device data is downlinked, while the slave devices receive the downlinked data; and S3, data of the slave devices is uplinked, while the host device receives the uplinked data. The bidirectional bus communication circuit provided by the invention can adopt various topology modes, and supports various modes such as an annular mode and a star-like mode, so that the engineering difficulty is greatly reduced in the aspects of topology modes, cable cost and wiring difficulty, the bidirectional bus communication circuit can support long-distance communication, up to 128 slave loads, and a low-power mode, and anti-jamming capability is enhanced.

An image sensor including a first pixel circuit, a second pixel circuit, a first readout line, a second readout line, a first readout circuit, a second readout circuit and an average switch is provided. The first and second pixel circuits are in two columns of a pixel array. The first readout line transmits pixel data of the first pixel circuit to the first readout circuit. The second readout line transmits pixel data of the second pixel circuit to the second readout circuit. The average switch is arranged between the first and second readout lines and used to electrically connect the first and second readout lines in an average mode to average the pixel data on the first and second readout lines.