Via Technologies, Inc.

Via Labs, Inc.

Chih-Long Ho

Bour-Yi Sze

Hung-Chih Chiu

Chin-Sung Hsu

Yi-Te Chen

Chun-Heng Lin

Kuo-Yu Wu

Nai-Chuan Hung

Felix Kao

Nean-Chu Cheng

Chih-Hsien Lin

Wen-Hao Cheng

Po-Ming Huang

Da-Wei Sung

Ming Lin Tsai

Ming-Chieh Huang

A dock and an operation method therefor are provided. The dock is suitable for propping up a mobile communication device. The dock includes an audio-receiving circuit, a rotating module, a communication circuit, and a controller circuit. The controller circuit is coupled to the audio-receiving circuit, the rotating module, and the communication circuit. The controller circuit transmits at least one of a plurality of audio signals generated by the audio-receiving circuit to the mobile communication device through the communication circuit, and determines an audio direction of an audio source according to the plurality of audio signals. The controller circuit controls the rotating module to rotate according to the audio direction, so as to bring the mobile communication device face toward the audio source.

Dock of mobile communication device and operation method therefor

A hub device and corresponding method include a first chip having at least a first upstream port and a plurality of first downstream ports, a second chip, having at least a second upstream port and at least one second downstream port; and an external memory device, storing firmware data corresponding to the first chip and the second chip. One one of the first downstream ports of the first chip is coupled to the second upstream port of the second chip to form a tiered hub, and the first chip and the second chip are sequentially enabled and the first chip and the second chip sequentially load the corresponding firmware data.

Hub devices and methods for initializing hub device

An integrated circuit design for differential variable capacitors uses an integration method to integrate an integrated circuit having differential variable capacitors as a whole, and takes the parasitic effect into consideration for the manufacturing process to lower the circuit inaccuracy and reduce the chip size effectively. Such arrangement lowers the manufacturing cost, identifies the quality of loading quality of the overall variable capacitance during the manufacture, and further controls the quality of loading capacity of the overall variable capacitance effectively. Furthermore, this invention does not need to reposition for the symmetrical position of the coils, and thus giving a very precise positioning to reduce the level of difficulty for the manufacture.

Differential variable capacitors and their applications

Improved voltage controlled oscillator (VCO) circuits are disclosed. A symmetrical voltage controlled oscillator (VCO) system according to the embodiments of the present invention comprises a frequency tuning circuit containing one or more varactors for receiving a predetermined tuning signal and a frequency tuning bias signal for altering capacitances of the varactors, a modulation circuit coupled in parallel with the frequency tuning circuit containing one or more varactors for modulating one or more outputs, and a core circuit coupled in a parallel with the tuning circuit and the modulation circuit for providing an oscillation mechanism, wherein the core circuit has an inductance module coupled in a parallel fashion with the frequency tuning circuit and the modulation circuit, wherein circuit elements of the VCO system are symmetrically arranged for increasing oscillation efficiency thereof and the varactors are tuned to deliver the output at an output frequency.

Signal modulated voltage controlled oscillator system

A layout structure of electrostatic discharge (ESD) protection circuit cooperated with an ESD protection device includes a first electrically conductive layer and a second electrically conductive layer. The first electrically conductive layer is disposed on the ESD protection device and electrically connected to the ESD protection device. The second electrically conductive layer is disposed on the first electrically conductive layer and electrically connected to the first electrically conductive layer. A width or a projection area of the second electrically conductive layer is less than that of the first electrically conductive layer.

Layout structure of electrostatic discharge protection circuit

A system is provided to improve frequency stability and system linearity in voltage controlled oscillators. A symmetrical voltage controlled oscillator system embodying the present invention comprises a frequency tuning circuit for receiving a frequency tuning signal, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal, a core circuit coupled with the frequency tuning circuit and the band tuning circuit for providing a first output and a second output that are complementary to each other, wherein upon asserting the switching signal, and upon adjusting the frequency tuning signal and the band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and total capacitance provided by the core circuit, the frequency tuning circuit and the band tuning circuit.

Symmetrical linear voltage controlled oscillator

A VCO system embodying the features of the present invention includes a frequency tuning circuit, a modulation circuit coupled in a parallel fashion with the frequency tuning circuit, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit, a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit, wherein upon asserting a switching signal and upon adjusting a frequency turning signal, a frequency tuning bias signal, and a band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for adjusting a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit.

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Taipei, Taiwan

Chih-Long Ho