Ite Tech. Inc.

Tzu-An Lin

Yi-Chung Chou

Hsu-Min Chen

Yu-Chin Chen

A touch detection device includes a processing unit, a first capacitor and a second capacitor. The processing unit has an output terminal for outputting a first analog signal, and an input terminal for receiving a second analog signal. The first capacitor has an adjustable first capacitance. The first capacitor includes a first terminal coupled to the output terminal of the processing unit, and a second terminal coupled to the input terminal of the processing unit. The second capacitor has a second capacitance. The second capacitor includes a first terminal coupled to the input terminal of the processing unit, and a second terminal coupled to a ground terminal. The first capacitance is adjusted to be substantially equal to the second capacitance. The processing unit determines whether a touch event is triggered according to variation of voltage level of the second analog signal.

Touch detection device including a set of capacitors and used to detect a touch event

A data-processing module can handle a predetermined command transmitted by a corresponding main controller through a command serial signal or a clock signal. When the predetermined command represents 'command-latching', the data-processing module controls a command register to store the data transmitted by a section of the command serial signal temporarily stored in an FIFO buffering circuit for latching command. When the predetermined command represents 'data-latching', the data-processing module controls a command register to store the data transmitted by the section of the command serial signal temporarily stored in the FIFO buffering circuit for latching data. In this way, the data-processing module can control the command register to latch command or the data register to latch data without a redundant pin for receiving latching signals transmitted by the main controller, reducing the cost of the data-processing module.

Data-processing module and method thereof

A voltage generating apparatus for a headphone is provided, which includes a voltage generator, a charge pump circuit, an operating amplifier and a controller. The voltage generator generates a first operating voltage. The charge pump circuit receives the first operating voltage and an adjusting signal, and generates a second operating voltage according to the first operating voltage and the adjusting signal. The operating amplifier receives the first operating voltage and the second operating voltage serving as the operating voltages thereof and receives an input signal so as to generate an output signal. The controller receives the second operating voltage and a control signal, and generates the adjusting signal according to the second operating voltage and the control signal.

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Hsinchu, Taiwan

Tzu-An Lin