Samsung Electronics Co., Ltd.

Young-Hoon Lee

Soo-Yong Kim

Je-Kook Kim

Soo-yong Kim

Seok-Min Yun

Bo-min Hwang

Sang-Yong Park

Chan-Woo Park

Byeong-Ha Park

Min-Shik Seok

In a semiconductor device for power management and a semiconductor system including the same, the semiconductor device includes an open loop source generator configured to generate an open loop source, an interface configured to output a dynamic voltage source (DVS) code based on the open loop source, a monitoring unit configured to receive a power supply voltage generated based on the DVS code as a feedback and generate a monitoring signal, and a phase difference measurement unit configured to compare the open loop source with the monitoring signal and set a hold time corresponding to an arithmetic period in a closed loop.

Semiconductor device employing closed loop and open loop DVFS control and semiconductor system including the same

A low-dropout regulator comprises an analog-to-digital converter that converts a feedback analog voltage signal into a digital signal, a phase synthesizing unit that generates a first control signal having a pulse width corresponding to error information in the digital signal by performing phase synthesis according to clock skew control, a charge pump circuit that selects a charge loop or a discharge loop based on polarity information in the digital signal, and generates an output control voltage according to current that flows during a period corresponding to the pulse width of the first control signal in the selected loop, and an output circuit that generates an output voltage based on an input voltage and the output control voltage, and generates the feedback analog voltage signal based on the output voltage.

Low-dropout regulator, power management system, and method of controlling low-dropout voltage

A signal processing apparatus of an optical disk recording/reproducing apparatus and a signal processing method performed thereby are provided. The signal processing apparatus may include an operational data generation unit for receiving digital signals, filtering received digital signals and outputting filtered signals as operational data and a data arithmetic-operation unit for performing an arithmetic operation on the operational data output by the operational data generation unit in response to a command.

Apparatus and method of processing signals of an optical disk recording/reproducing apparatus

An ADIP (address in pre-groove) signal detection circuit is capable of correctly and quickly detecting discontinuous points in a wobble signal, and has a simple configuration in a wobble detection system of an optical disc device such as a DVD+R/RW, and an ADIP signal detection method thereof. The ADIP signal detection circuit performing the ADIP signal detection method includes one or two window comparators, two edge detection circuits each consisting of an exclusive OR circuit and an AND circuit, and two discontinuous point determination circuits each consisting of a flip-flop and a counter. Therefore, the ADIP signal detection circuit has a simple configuration so that it can be easily implemented. Also, since the ADIP signal detection circuit has a fast operation speed, the ADIP signal detection circuit detects discontinuous points correctly and quickly.

Circuit and method for detecting address in pre-groove (ADIP) signal in wobble detection system of optical disc apparatus

An optical disc system and a method of managing shock while recording or playing data in the optical disc system are provided. The optical disc system includes an optical pick-up unit for applying a laser beam to a track of an optical disc and detecting reflected light, a servo unit for controlling tracking and focus of the optical pick-up unit and a monitoring unit for comparing a monitoring signal, which is output from the optical pick-up unit and the servo unit, with a reference signal and generating a blocking signal and a blocking release signal. Recording or playing of data on the optical disc is stopped in response to the blocking signal, and recording or playing of the data on the optical disc is resumed in response to the blocking release signal based on a state of the optical disc system when recording or playing was stopped.

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Seoul, South Korea

Young-Hoon Lee