Taiwan Semiconductor Manufacturing Comp. Ltd.

Mediatek Corporation

Tysh-Bin Liu

Chan-Hong Chern

Kun-Lung Chen

Chun Lin Tsai

Alan S Roth

Eric Soenen

Yu-Hsuan Lin

King-Yuen Wong

Yuh Cheng

Ming-Cheng Lin

Chu Fu Chen

Mark Chen

Chia-Chun Chang

Tzu-Chieh Lin

Chih-Ching Chen

Kuo-Jung Lan

Hao-Hui Yin

Chih-chung Wu

Devices and methods are provided for controlling dead-time of a direct current to direct current (DC-DC) converter. A control circuit includes a first transistor having a source/drain terminal coupled to an output voltage of the DC-DC converter configured to provide current based on the output voltage. The control circuit also includes a digital up/down counter having an output terminal electrically coupled to an input terminal of a delay cell of the DC-DC converter. A current sensing circuit of the control circuit is electrically coupled to an input terminal of the digital up/down counter configured to receive the current and drive the digital up/down counter based on the current.

Auto calibration dead-time control circuit

Devices, systems, and methods are provided for generating a high, dynamic voltage boost. An integrated circuit (IC) includes a driving circuit having a first stage and a second stage. The driving circuit is configured to provide an overdrive voltage. The IC also includes a charge pump circuit coupled between the first stage and the second stage. The charge pump circuit is configured generate a dynamic voltage greater than the overdrive voltage. The IC also includes a bootstrap circuit coupled to the charge pump circuit, configured to further dynamically boost the overdrive voltage of the driving circuit.

Generating high dynamic voltage boost

Devices are described herein for a low static current semiconductor device. A semiconductor device includes a power transistor and a driving circuit coupled to and configured to drive the power transistor. The driving circuit includes a first stage having an enhancement-mode high-electron-mobility transistor (HEMT) and a second stage that is coupled between the first stage and the power transistor and that includes a pair of enhancement-mode HEMTs.

Low static current semiconductor device

A semiconductor device includes a power transistor and a driving circuit. The driving circuit is coupled to and is configured to drive the power transistor and includes first and second stages. The second stage is coupled between the first stage and the power transistor. Each of the first and second stages includes a pair of enhancement-mode high-electron-mobility transistors (HEMTs). The construction as such lowers a static current of the driving circuit.

A power saving method and a power saving system are applied in an optical disk drive. The power saving system comprises a power controlling unit for differentiating the specific sets of circuits not being used at a specific operation rate and powering them down. The sets of circuits not being used will be powered up while the associated operation rate at which they are required to operate is nearly started.

Power saving method and system applied in optical disk drive

A device for detecting wobbles on an optical disc is provided, where the device is utilized for generating a wobble signal according to a plurality of detection signals. The device includes an analog signal processing circuit, a pair of analog-to-digital converters (ADCs), and a digital signal processing circuit. The analog signal processing circuit is arranged to perform analog signal processing on the detection signals to generate a plurality of output signals. In addition, the pair of ADCs are arranged to digitalize the output signals to generate a plurality of digital values. Additionally, the digital signal processing circuit is arranged to perform digital signal processing on the digital values and generate an arithmetic output, where the arithmetic output is utilized for generating the wobble signal or utilized as the wobble signal. An associated method for detecting wobbles on an optical disc is further provided.

Methods and devices for detecting wobbles on an optical disc

The invention provides an electronic apparatus. In one embodiment, the electronic apparatus comprises an analog-to-digital converter (ADC) and an enable device. The analog-to-digital converter converts an analog input signal to a digital output signal with a resolution having a plurality of bits. The enable device dynamically adjusts the resolution of the analog-to-digital converter according to an instruction signal.

Growing community of inventors

Hsinchu County, Taiwan

Tysh-Bin Liu