Mediatek Corporation

Ding-Shiuan Shen

Hao-Ping Hong

Shang-Ping Chen

Ping-Ying Wang

Shang-Pin Chen

Bo-Jiun Chen

A universal serial bus device includes: a core circuit having a first pin and a second pin, and having an input impedance looking into the core circuit from the first pin and the second pin; and a charging control circuit, coupled to the core circuit, arranged for selectively providing a voltage source to one of the first pin and the second pin; wherein the input impedance of the core circuit is configured to make the voltage source substantially intact when the voltage source is coupled to one of the first pin and the second pin.

USB device for making I/O pin with intact voltage during charging procedure and related method

A universal serial bus device includes: a core circuit having a first pin and a second pin, and having an input impedance looking into the core circuit from the first pin and the second pin; and a charging control circuit, coupled to the core circuit, arranged for providing a voltage source having a predetermined voltage to one of the first pin and the second pin and for providing a current source having a predetermined current to the other of the first pin and the second pin; wherein the input impedance of the core circuit is configured to make the predetermined voltage and the predetermined current substantially intact when an external charger charges a battery device of the universal serial bus device.

Universal serial bus device and charging and enumeration method

A phase-locked loop circuit, including: an operating circuit for detecting a difference between a reference signal and a feedback oscillating signal to generate a detected result, and generating a first control signal according to the detected result, an auxiliary circuit for generating a second control signal that is asynchronous with the first control signal, and a controllable oscillator coupled to the operating circuit and the auxiliary circuit for generating an output oscillating signal according to the first control signal and the second control signal, wherein the feedback oscillating signal is derived from the output oscillating signal.

Growing community of inventors

Chiayi County, Taiwan

Ding-Shiuan Shen