Wistron Neweb Corporation

Integrated Systems Solution Corp.

Chih-Min Hsu

Tsun-Che Huang

Albert Chen

Wei-Shan Chang

Charles Huang

Jia-Jiuan Wu

Ting-Yu Wu

Jui-Liang Wang

Dar-Cherng Su

Cheng-Chieh Ku

A beam forming device, a calibration method and a calibration system using the same are provided. The beam forming device includes a processor, a memory unit, a baseband circuit, and a plurality of antenna modules. The baseband circuit is electrically connected to the processor and the memory unit. The plurality of antenna modules each include multiple antenna elements, multiple phase shifters and multiple amplifiers corresponding to the multiple antenna elements. The memory unit stores a plurality of reference codebooks and instruction data, the plurality of reference codebooks each have a reference angle and the reference angles are different from each other, and the instruction data is used to specify a predetermined codebook from the plurality of reference codebooks to control multiple antenna modules, thereby enabling multiple antenna modules to transmit and receive signals.

Beamforming device, calibration method and calibration system for the same

A beam forming device, a calibration method and a calibration system using the same are provided. The beam forming device includes a processor, a memory unit, a baseband circuit, and a plurality of antenna modules. The antenna modules each includes multiple antenna elements, and multiple phase shifters and multiple of amplifiers respectively corresponding to the antenna elements. The memory unit stores a reference codebook, a plurality of calibration codebooks and instructing data, each of the plurality of calibration codebooks includes a plurality of records of calibration control data divided by a plurality of target patterns, and a plurality of predetermined phase differences that are different from each other respectively existed between the plurality of calibration codebooks and the reference codebook. The instruction data is used for instructing the beamforming device to use one of the reference codebook and the plurality of calibration codebooks in transmitting and receiving signals.

A charge control system for lithium battery using pulse width modulation is provided, and it detects the existing voltage of the charging lithium battery by a voltage detector and passes this voltage value to a microprocessor preset in the hand-held apparatus. Thus, the microprocessor can decide the applicable charge stage and confirm the status of the charging battery depending on the different Voltage values in real time. Next, the microprocessor controls a control unit by a pulse width modulation signal to modulate the power-source, which comes from an adaptor, as a constant current or a constant voltage to charge the battery. Accordingly, the charge process is completed by repeating the voltage detection and the duty cycle modulation of the control unit.

Charge control system using pulse width modulation

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Hsinchu, Taiwan

Chih-Min Hsu