Samsung Electronics Co., Ltd.

Jin-Sub Choi

Jae-Gon Lee

Hark-Sang Kim

Dong-Jin Keum

Soon-Jin Kim

Yeong-Moo Ryu

Taek-Kyun Shin

Ho-Jung Ju

Jung-Woo Ha

Yun-Hyang Kim

Mi-Kyung Han

Sang-Jung Jeon

Byung-Chul Jeon

Jong-Sung Hong

Yung-Gu Kang

Tae-Moon Roh

A charging circuit may include a battery unit in which a rechargeable battery is mounted; a charging unit configured to provide a charging current to the rechargeable battery in the battery unit, based on a direct current (DC) voltage converted from an alternating current (AC) voltage, and configured to charge the rechargeable battery; and/or a controller configured to control the charging unit such that the charging unit provides the rechargeable battery with a first charging current following a first current profile in a first charging mode as the charging current at least in a first period of the first charging mode, based on the charging current, a battery voltage of the rechargeable battery, and a temperature of the rechargeable battery, wherein the first current profile is smaller than an available maximum current in the first period.

Charging circuits, charging systems, and wireless power reception devices including the same

A method of performing a dynamic voltage and frequency scaling operation comprises controlling a clock management unit (CMU) to predict an operating state of a central processing unit (CPU) and to provide operating frequency information to a power management integrated circuit (PMIC) based on the predicted operating state of the CPU, the operating frequency information indicating a change of an operating frequency of an application processor, and controlling the PMIC to change an operating voltage of the application processor based on the operating frequency information provided from the clock management unit.

Method of performing dynamic voltage and frequency scaling operation, application processor performing method, and mobile device comprising application processor

A charging circuit includes a current mirror block configured to charge a load in response to a control voltage applied thereto, and a charge controller configured to generate the control voltage in response to comparison result values obtained by comparing a current sensing value and a voltage sensing value of the current mirror block with respective reference values. The comparison result value are applied to the gates of MOS transistors connected in series. The charge controller is configured to switch a charge mode from a constant current charge mode to a constant voltage charge mode when the charge state of the load reaches a predetermined state.

Charging circuit having a smooth charging transition mode including a current mirror block controlled by a charge mode transition block comprising series connected transistors

A memory expansion pack, which includes a memory for storing content, an FM receiver, an ear jack, and a controller, is connected with a portable terminal through a connector of the pack to provide content to the terminal. Under the control of the controller, content stored in the memory and audio data, which is received through the FM receiver from an external device over a set frequency channel, is transmitted to the terminal. When the ear jack is connected with the external output device, it outputs the content through the external output device. When the ear jack is connected with a device, such as a PC, the ear jack downloads content from the PC. The memory expansion pack allows the user to provide and use a large amount of various content. The pack can also provide high quality services, overcoming the limited memory capacity of portable terminals, and reduce the cost of wireless data communication.

Memory expansion pack for providing content to portable terminal

A vocal mix circuit shifts the phase of a mixed audio signal using a phase shifter, and achieves a mixed signal emphasizing the voice components thereof, by subtracting a signal which is not shifted from the signal shifted by the phase shifter. Gain through the above steps is controlled by the gain controller. Then, operators process both the initial signals and the signal through the phase shifter and the gain controller. Accordingly, the vocal mix circuit enables a person to hear with high sensitivity, has a simple circuit, and reduces the number of external pins.

Vocal mix circuit

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Yongin-si, South Korea

Jin-Sub Choi