88results about How to "Precise power control" patented technology

Disclosed is a digitally controlled multi-phase voltage regulator system providing regulated power to electronic components that have variable power requirements. Power is supplied by one or more power integrated circuits (IC) each having a high side power switch controlled by pulse width modulated signals and a low side power switch. The power IC senses voltage at the load and has an on-chip current mirror for generating a current that is a ratio of current delivered to the load. The power IC also has current limiting and on-chip temperature sensing components. The voltage and current information is digitized and provided to a control integrated circuit (IC). The control IC receives this digitized information as well as user provided parameters and, in the regulation mode of operation, provides digitized pulse width modulated control signals to the power IC. In an active transient response mode of operation, the control IC provides signals to turn either the high side switches or low side switches ON. Fault detection circuitry identifies over voltage, under voltage, and excessive temperatures. All communications between the control IC and the power IC are digital providing high bandwidth, optimal control frequency response, noise immunity and efficient active transient response.

Disclosed is a digitally controlled multi-phase voltage regulator system providing regulated power to electronic components that have variable power requirements. Power is supplied by one or more power integrated circuits (IC) each having a high side power switch controlled by pulse width modulated signals and a low side power switch. The power IC senses voltage at the load and has an on-chip current mirror for generating a current that is a ratio of current delivered to the load. The power IC also has current limiting and on-chip temperature sensing components. The voltage and current information is digitized and provided to a control integrated circuit (IC). The control IC receives this digitized information as well as user provided parameters and, in the regulation mode of operation, provides digitized pulse width modulated control signals to the power IC. In an active transient response mode of operation, the control IC provides signals to turn either the high side switches or low side switches ON. Fault detection circuitry identifies over voltage, under voltage, and excessive temperatures. All communications between the control IC and the power IC are digital providing high bandwidth, optimal control frequency response, noise immunity and efficient active transient response.

By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus 100 has detector 106 that detects output power of power amplifier 103, PAPR calculating section 131 that calculates the PAPR of the spread modulated signal, compensation value generating section 134 that outputs a compensation value corresponding to the calculated PAPR and an arithmetic operator that performs an arithmetic operation using the compensation value and a detection result obtained by detector 106. By this means, it is possible to compensate for the sensitivity of detector 106 (measurement sensitivity) that changes depending on the P parameter and mode and make the sensitivity of detector 106 (measurement sensitivity) virtually constant.

A method and apparatus in a base station for jointly controlling sub-channel transmission power and assigned codec modes for a first and second mobile station utilizing Voice services over Adaptive Multi-user channel on One Slot (VAMOS). The base station receives signal quality information reports from the mobile stations every 480 ms using the Slow Associated Control Channel (SACCH), and receives codec mode requests from the mobile stations every 40 ms using Adaptive Multi-Rate (AMR) in-band signaling. The base station associates the requested codec modes with estimated levels of speech quality currently being experienced by the first and second mobile stations. The base station then allocates sub-channel transmission power and assigns codec modes to the first and second mobile stations based on the estimated levels of speech quality associated with the requested codec modes and the signal quality reports.

The invention relates to a piece of electronic equipment and a wireless communication method in a wireless communication system. The electronic equipment at a user equipment side according to the invention and target user equipment carry out device-to-device D2D communication. The electronic equipment comprises a path loss report unit which is configured to acquire the path loss between the electronic equipment and the target user equipment and report the information of path loss to a piece of base station equipment, and a power determination unit which is configured to acquire the information about a first power parameter from the base station equipment and determine the D2D transmission power of D2D communication between the electronic equipment and the target user equipment based on the first power parameter, wherein the first power parameter is related to the path loss.

A power generating apparatus including an AC generator that supplies electric power to a load including a voltage accumulating means, an inverter that applies AC control voltage to armature winding of the generator from the voltage accumulating means, and a controller that controls a phase of control voltage applied to the armature winding by the inverter to keep load voltage at a target value, wherein the phase of the control voltage is controlled so as to advance when the load voltage is higher than the target value, hold the present phase when the load voltage is equal to the target value, advance when the load voltage is lower than the target value and a phase of phase voltage of the generator is delayed behind a phase of a phase current of the same phase, and delay when the load voltage is lower than the target value and the phase of the phase voltage of the generator is advanced ahead of a phase of a phase current of the same phase.

The invention discloses a transmission point or beam indication method and apparatus, and a transmission method and apparatus of a new generation wireless communication system. The transmission pointor beam indication method comprises the following steps: determining, by a network side, a transmission point or beam in a cell for providing signaling and / or data transmission for a terminal; and ina random access process, sending random access response to the terminal, wherein the random access response carries the information of the transmission point or the beam. In the random access process,the terminal receives the random access response, the random access response carries the information of the transmission point or the beam in the cell for providing the signaling and / or data transmission for the terminal; and the terminal performs TRP / Beam level transmission according to the transmission point or the beam. By adoption of the transmission point or beam indication method and apparatus disclosed by the invention, the air interface resource overhead can be reduced, and the system capacity is improved; the power consumption of the network side and the terminal is reduced; accuratechannel estimation measurement and precise power control can be achieved, and it is conducive to improving the reliability of signaling and data transmission.

A flyback converter detects an output voltage at the primary coil without using a photo coupler and provides an essentially constant output voltage independent of the load size, thereby minimizing the number of additional coils used in the transformer circuit to realize simple construction and providing accurate power control. In one embodiment, the flyback converter includes: a transformer for changing an input voltage to a predetermined level according to a winding ratio; an output unit for rectifying the voltage signal output from the transformer into a DC signal to drive a load; a switch coupled to the primary coil of the transformer for controlling the on / off state of a power at the primary coil according to a switching control signal; a feedback unit generating a feedback signal and detecting a current of the switch to correct the feedback signal; and a switching controller operating according to the feedback signal.

The invention discloses a power control method of detection reference signals. The method includes that a plurality of sets of power control parameters of the detection reference signals or power compensation values of a plurality of detection reference signals are collocated for a receiving side by a network side; and the network side notices the receiving side through high-layer signals or physical-layer signals to enable the receiving side to confirm emitting power of the detection reference signals through a period or non-period method according to power control parameters of the detection reference parameters or power compensation values of the detection reference signals. The invention further provides a power control system and a device of the detection reference signals. According to the technical scheme, emitting power control of the detection reference signals can be achieved accurately and flexibly.

An apparatus is provided comprising a dual optical amplifier. The two optical amplifiers are integrated, in that they share at a set of optical, electrical, or opto-electrical components. The two optical amplifiers may share a pump laser. Alternatively, the optical amplifiers may share photo-detectors. Methods of controlling the signal strength of output signals are also provided. A chip-based integrated optical dual amplifier, using Erbium-Doped Waveguides, is also provided.

By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus 100 has detector 106 that detects output power of power amplifier 103, PAPR calculating section 131 that calculates the PAPR of the spread modulated signal, compensation value generating section 134 that outputs a compensation value corresponding to the calculated PAPR and an arithmetic operator that performs an arithmetic operation using the compensation value and a detection result obtained by detector 106. By this means, it is possible to compensate for the sensitivity of detector 106 (measurement sensitivity) that changes depending on the B parameter and mode and make the sensitivity of detector 106 (measurement sensitivity) virtually constant.

The invention provides an up converter and a signal processing method thereof. The up converter mainly comprises a local frequency synthesizer, a quadrature modulator, a power automatic gain control module and a power attenuation module. The signal processing method mainly comprises: based on received frequency scale input signal and set frequency allocation data, the local frequency of various frequency points is generated, a radio frequency local signal having the local frequency and baseband signals of I and Q ways are mixed in the quadrature modulation mode to obtain a single side band radio frequency modulation signal; and the power of the single side band radio frequency modulation signal is subjected to automatic gain control, and then to accurate power control. The up converter can output the signals (such as navigation signal) compatible with a plurality of frequency points, and the frequency by which the signals are outputted can be conveniently changed in real time by a user during operation.

A power generating apparatus including an AC generator that supplies electric power to a load including a voltage accumulating means, an inverter that applies AC control voltage to armature winding of the generator from the voltage accumulating means, and a controller that controls a phase of control voltage applied to the armature winding by the inverter to keep load voltage at a target value, wherein the phase of the control voltage is controlled so as to advance when the load voltage is higher than the target value, hold the present phase when the load voltage is equal to the target value, advance when the load voltage is lower than the target value and a phase of phase voltage of the generator is delayed behind a phase of a phase current of the same phase, and delay when the load voltage is lower than the target value and the phase of the phase voltage of the generator is advanced ahead of a phase of a phase current of the same phase.

Provided is an apparatus and method for a digital power supply that can provide independent power control, and control variable power, for two or more electrical loads. Disclosed embodiments may reduce the magnitude of harmonic currents and / or flicker introduced into a power system. Embodiments include a microprocessor that delivers power to electric loads using phase-controlled AC current. The microprocessor may calculate a power array corresponding to a requested power for each electric load. Logic is provided for populating the power array in a pattern that reduces the magnitude of harmonic currents and flicker.

Provided is an apparatus and method for a digital power supply that can provide independent power control for two or more electrical loads. Some disclosed embodiments provide continuous, variable power and other disclosed embodiments provide discrete power levels. Disclosed embodiments may reduce the magnitude of harmonic currents and / or flicker introduced into a power system. Embodiments include a microprocessor that delivers power to electric loads using phase-controlled AC current. In some embodiments, the microprocessor may calculate a power array corresponding to a requested power for each electric load. Logic is provided for populating the power array in a pattern that reduces the magnitude of harmonic currents and flicker. Portions of the disclosure include a band controller for delivering power to achieve and maintain a desired target temperature, and a wireless controller for controlling temperature from a remote device.

The invention discloses an uplink self-adaptive closed loop power control method, which is applied to a satellite communication system. The interference with a satellite signal link from the factors, such as environment is eliminated by a binary search increasing-based power control algorithm. A ground control center is introduced into the satellite communication system for analyzing the error rate of a signal; and the power amplification factor at the next moment is calculated by adopting the binary search increasing-based power control algorithm, and various interferences, such as surrounding and the like, are quickly and accurately sensed, so interference is eliminated by self-adaptive power control. The satellite communication system at least comprises a geostationary satellite, an earth station, and the ground control center; a signal carrier is transmitted between the earth station and a satellite; and the ground control center manages a plurality of adjacent earth stations and sends power control commands to the plurality of adjacent earth stations to eliminate the interference with the satellite signal link from the factors, such as environment and the like.

The invention relates to a power control method and a cellular radio system used for power control, comprises at least one subscriber terminal, one base station and means for changing the step size to be used for power control. The means receive information on the speed of the subscriber terminal and the cellular radio system uses a fading channel. The means change the step size to be used for power control on the basis of the information on hte speed of the subscriber terminal for diminishing fading in the channel.

An image-forming device has an image-carrying unit, a transferring unit, a power-supplying unit, a current-detecting unit, a voltage-detecting unit, a memory unit, and a controller. The power-supplying unit supplies voltage and current to the transferring unit to transfer a toner onto a recording medium. The current-detecting unit detects the current flowing in the transferring unit. The voltage-detecting unit detects the voltage applied to the transferring unit. The memory unit stores a characteristic curve indicating a correlation between an optimal current and at least the detected voltage. The optimal current enables the transferring unit to transfer the toner supported on the image-carrying unit onto the recording medium. The controller controls the power-supplying unit to supply the optimal current to the transferring unit.

An output power control circuit of a power amplifier connected to the power amplifier comprises a first operational amplifier (AMP0), a first PMOS transistor, and a current sampling module (102). A negative input end of the first operational amplifier (AMP0) receives a power control signal. A gate of the first PMOS transistor is connected to an output end of the first operational amplifier (AMP0), a source is connected to an external power supply, and a drain is grounded by means of a first voltage offloading network (104). A power supply end of the power amplifier is connected to the drain of the first PMOS transistor, an input end accesses a signal to be amplified and an output end amplifies a signal. The current sampling module (102) samples a current of the first PMOS transistor to form a sampled current, and provides a negative feedback signal to a positive input end of the first operational amplifier (AMP0) according to the sampled current, so that a total power of the power amplifier is unchanged. The technical solutions can maintain a total power of a power amplifier unchanged, so that a correspondence between a load impedance change and an output power is weakened and power control is more accurate.

A method and an apparatus for redistributing differentiated power for transmitting high speed packet data according to UEs in high speed packet data transport system. The method and apparatus redistribute powers, which have been already assigned in order to transmit the high speed packet data, thereby improving the performance of the system.

Even when there is limit placed upon transmission power control time, the transmission power control method enables accurate control transmission power. The transmission power control method includes: a first measuring step of measuring, in a symbol interval before a symbol interval where mode of the power amplifier changes, output power of the power amplifier before mode changes; a first setting step of setting target power of the power amplifier after mode changes based on a measurement result obtained in the first measuring step and a transmission power control signal; a second measuring step of measuring, in the symbol interval where mode of the power amplifier changes, output power of the power amplifier after mode changes, the output power being controlled using the target power set in the first setting step; and a second step of setting corrected target power based on a measurement result obtained in the second measuring step.

The invention discloses a current sampling circuit with the temperature drifting compensation function. The current sampling circuit comprises a current sampling circuit, a two-level current filter circuit, a current amplifying circuit, an NTC proportional adjusting circuit, a signal following circuit and a signal filter circuit. According to the current sampling circuit, a negative temperature coefficient thermistor serves as a component for sampling temperature drifting compensation, an integral type proportional feedback type circuit with an operational amplifier and RC filtering integrated is adopted, and finally, the current sampling value does not change along with the change of the temperature of a sampling resistor. On the occasion where a motor driver needs to carry out operation power controlling, accurate power controlling is achieved.

The invention discloses a power control method and device. The method comprises that when uplink signals, in the first time-domain transmission length, are transmitted in a channel, at least first information, transmitted in the channel, is received, and the first time-domain transmission length does not exceed the time-domain transmission length of a protocol data unit (PDU); and the uplink emission efficiency in the period of the first time-domain transmission length is adjusted according to the at least first information at least. Via the method and device, emission-end equipment can adjust the emission power of the uplink signals dynamically according to the received first information transmitted in the same channel in the process that the uplink signals are transmitted, the adjusting granularity of emission power is improved, and power control is more accurate.

The embodiment of the invention provides a mobile terminal, a communication method thereof and a RF calibration circuit. The communication method comprises the steps of detecting an antenna environment where the mobile terminal is; finding communication parameters corresponding to the antenna environment from a parameter table, wherein the parameter table is obtained by calibrating the mobile terminal by adding adjustable matching networks to the RF circuit of the mobile terminal, wherein the adjustable matching circuits are used for simulating load impedance in different antenna environments;and communicating by utilizing the found communication parameters. According to the mobile terminal, the communication method thereof and the RF calibration circuit, different communication parameters are called in different antenna environments for communication, and the power control is enabled to more accurate.

The present invention relates to the technical field of electronic cigarette control systems, and in particular, to an electronic cigarette with a dual air pressure sensor and a control method thereof. The electronic cigarette comprises: a first air pressure sensor arranged in an airway of a tobacco rod, wherein the first air pressure sensor is configured to detect the internal air pressure of theairway and feedback the internal air pressure to a micro control unit; a second air pressure sensor arranged in the tobacco rod, wherein the second air pressure sensor is configured to detect the ambient air pressure around an atomizer and feedback the ambient air pressure to the micro control unit; and the micro control unit, wherein, when the internal air pressure reaches the wake-up threshold,the micro control unit enters a working state from the sleep state and calculates the difference between the internal air pressure and the ambient air pressure, and when the difference reaches any suction threshold, the micro control unit adjusts the power of the heating wire according to the suction threshold. The technical scheme of the present invention has the beneficial effects that: the impact caused by changes in the ambient air pressure can be eliminated, and the accuracy of suction detection can be improved; the power of the heating wire can be accurately controlled according to thesize of the suction; and the power consumption of the electronic cigarette can be reduced, and the battery service time and service life can be increased.

Even when there is limit placed upon transmission power control time, the transmission power control method enables accurate control transmission power. The transmission power control method includes: a first measuring step of measuring, in a symbol interval before a symbol interval where mode of the power amplifier changes, output power of the power amplifier before mode changes; a first setting step of setting target power of the power amplifier after mode changes based on a measurement result obtained in the first measuring step and a transmission power control signal; a second measuring step of measuring, in the symbol interval where mode of the power amplifier changes, output power of the power amplifier after mode changes, the output power being controlled using the target power set in the first setting step; and a second step of setting corrected target power based on a measurement result obtained in the second measuring step.

The embodiment of the invention relates to a power control method based on multiple beams, a user terminal and a base station. The method comprises the following steps: configuring power control parameters of an uplink transmission beam of a UE; sending power control parameters to the UE; receiving a power margin and / or a maximum transmission power of an uplink transmission beam transmitted by theUE; performing power control according to the received power margin of the uplink transmission beam and / or the maximum transmission power; wherein the power margin and / or the maximum transmission power of the uplink transmission beam are calculated by the UE according to the received power control parameters of the uplink transmission beam. The embodiment of the invention can perform power control on different uplink transmission beams (or uplink transmission beam pairs, or uplink transmission beam groups, or uplink transmission beam sets) according to the power margin and / or the maximum transmission power fed back by the UE, thereby realizing more accurate power control for different beams at the network side.

The invention discloses a phase detecting device based on a clamped beam capacity type micromechanical microwave power sensor. The detecting device comprises a clamped beam capacity type micromechanical microwave power sensor, a power combiner, a phase shifter with digits adjustable, and a capacity-digital converter, wherein a referenced microwave signal (Vref) which is the same as a signal (Vx) to be detected in frequency is added to a first input port (10) of the power combiner, the signal (Vx) to be detected is added to an input port (7) of the phase shifter with the digits adjustable and added to a second input port (11) of the power combiner after phase shifting through the phase shifter with the digits adjustable (8), the referenced microwave signal (Vref) and the signal (Vx) to be detected reach an output port (13) of the power combiner after vectorial resultant through the power generator (12), and then the referenced microwave signal (Vref) and the signal (Vx) to be detected are added to an input port (14) of the clamped beam capacity type micromechanical microwave power sensor. According to the phase detecting device based on the clamped beam capacity type micromechanical microwave power sensor, the aim of accurate detection of phases of the microwave signal is achieved.

A method and apparatus in a base station for jointly controlling sub-channel transmission power and assigned codec modes for a first and second mobile station utilizing Voice services over Adaptive Multi-user channel on One Slot (VAMOS). The base station receives signal quality information reports from the mobile stations every 480 ms using the Slow Associated Control Channel (SACCH), and receives codec mode requests from the mobile stations every 40 ms using Adaptive Multi-Rate (AMR) in-band signaling. The base station associates the requested codec modes with estimated levels of speech quality currently being experienced by the first and second mobile stations. The base station then allocates sub-channel transmission power and assigns codec modes to the first and second mobile stations based on the estimated levels of speech quality associated with the requested codec modes and the signal quality reports.

The invention provides a method for data transmission, which adopt 5msTTI to transmit the data and takes 20ms time spacing of continuous 4 TTIs as a entire scheduling period, the method comprises the following steps that: a UE utilizes an initial transmission power to transmit the data to a base station; after the first TTI, the base station sends a first TPC to the UE, the UE performs a first closed ring power control according to value of the TPC in order to regulate the transmission power of the UE, the UE uses the regulated transmission power to transmit the data to the base station; after the second TTI, the step which is same as the step after the first TTI is performed; after the third TTI, the step which is same as the step after the first TTI is performed; and after the fourth TTI, the UE utilizes the finally-regulated transmission power to transmit the data to the base station. The invention also provides a data transmission system.