Huawei Technologies Co., Limited

Stmicroelectronics (shenzhen) R&d Co. Ltd.

Zte Corporation

Hai Bo Zhang

Wenlin Zhang

Jerry Huang

Hao Hu

Dongming Zhu

Xiaoqin Duan

Chengzhen Sun

Bingyu Qu

Jun Liu

Xi Chen

Peng Zhang

Lei Zhang

Jun Ming Yan

Jin Li

Tao Lu

Xudong Zhang

Kun Xu

Liang Zhu

Yanhong Wang

Haipeng Liu

Zhenming Zhu

Jun Gu

Jing Qi

Guotian Fan

Sanford Li

Yan He

Baolei Ge

Yong Jun Wu

Zi Yu Zeng

Bag for notebook computers

Liners of a bag for notebook computers

A driver circuit includes a high-side power transistor having a source-drain path coupled between a first node and a second node and a low-side power transistor having a source-drain path coupled between the second node and a third node. A high-side drive circuit, having an input configured to receive a drive signal, includes an output configured to drive a control terminal of said high-side power transistor. The high-side drive circuit is configured to operate as a capacitive driver. A low-side drive circuit, having an input configured to receive a complement drive signal, includes an output configured to drive a control terminal of said low-side power transistor. The low-side drive circuit is configured to operate as a level-shifting driver.

Inverting buck-boost converter drive circuit and method

Luggage liner

Method, terminal, CDN server and system in IPTV system for realizing playing while downloading, the method comprises: the terminal acquires the bit rate information of the media file which the terminal requires to play from the content distribution network CDN server, the CDN server returns a first reply message to the terminal after receiving the requirement, the first reply message piggybacks the bit rate information of the media file which said terminal requires to play, the terminal determines whether said bit rate information satisfies the condition of playing while downloading, if it satisfies, the terminal requires to download the file from said CDN server which user requires while plays said media file.

Method, terminal and CDN server in IPTV system for realizing playing while downloading

A power converter includes an input and an output with an energy storage circuit and a power switching circuit coupled between the input and the output. A feedback circuit generates a feedback voltage which is differentially compared to a reference in an error amplifier circuit to generate an error amplification signal. A comparator circuit generates a control signal for controlling on/off of the power switching circuit based on a first comparison signal related to the error amplification signal and a second comparison signal related to a charging current of the energy storage circuit. A regulating circuit is coupled between an output of the error amplifier circuit and an input of the comparator circuit for receiving the first comparison signal, the regulating circuit is configured to couple a voltage compensation signal related to an input voltage received by the input to an output of the error amplifier, so as to reduce a variation amount of the error amplification signal when the input voltage varies.

Power converter and method for regulating line transient response of the power converter

In a network constructed according to a network planning parameter, access scheduling is performed on a User Equipment UE in accordance with a type of a service of the UE; statistics on an indicator of performing access scheduling on the UE are acquired; and it is determined whether the indicator meets a requirement in network capacity planning; and when the indicator meets the requirement, a target planning parameter is determined as the network planning parameter; otherwise when the indicator does not meet the requirement, the network planning parameter is adjusted until the indicator meets the requirement in network capacity planning. Network capacity for multiple services is planned according to service features, improving accuracy of network capacity planning.

Capacity planning method and device for wireless broadband network

A first softstart signal indicates operation in a load phase for a boost rectifier and a second softstart signal indicates operation in a pulse drive phase which follows the load phase. A rectification transistor is actuated for the duration of the load phase in response to the first softstart circuit to generate a rising output voltage. The rectification transistor is further repeatedly actuated during the pulse drive phase in response to the second softstart circuit to generate a boosted output voltage. A first transistor coupled between a first conduction terminal and a body terminal of the rectification transistor is actuated, and a second transistor coupled between the body terminal and a second conduction terminal of the rectification transistor is deactuated, during the load phase. The first transistor is deactuated, and the second transistor is actuated, during the pulse drive phase.

Boost converter with circuit for body switching of the rectification transistor

The present application relates to a user accessing to a visited network in a wireless telecommunication network. After receiving an access request from the user for selecting a visited network and detecting the visited network selected by the user has changed, an AAA server device initiates a request for obtaining authentication and/or authorization information of the user from a HSS. In the process of obtaining the authentication and/or authorization information, the HSS checks whether the user is authorized to access to the visited network according to a list of authorized visited networks stored in the HSS.

Method, system and apparatus for accessing a visited network

An embodiment of a method includes generating a regulated output signal from a regulated intermediate signal in response to a reference signal and the regulated output signal, and generating the regulated intermediate signal from an input signal in response to the regulated output signal and the regulated intermediate signal. By generating one regulated signal (e.g., a regulated output voltage) from another regulated signal (e.g., a regulated intermediate voltage), the magnitude of the ripple component of the one regulated signal may be reduced. Furthermore, by generating the regulated intermediate signal in response to the regulated output signal, the efficiency of the regulation may be increased.

Generating a regulated signal from another regulated signal

A current mode DC-DC controller operates with high efficiency even when the input and output voltages are close. Switches selectively connecting an input, ground and an output to inductor terminals are controlled in a buck/boost region to alternate between operation as a buck converter and operation as a boost converter. The number of switches repeatedly changing state is thus reduced, lowering switching losses and improving conversion efficiency. Current through the inductor during operation is sensed and compared to an error value to control switching from buck mode operation to boost mode operation and back.

Current mode buck-boost DC-DC controller

A constant-frequency current-mode-controlled boost converter circuit provides slope compensation of an inductor current, reduces reverse inductor current in light output load conditions, and reduces oscillation between a discontinuous current mode and a continuous current mode by enabling or disabling an inductor current threshold. The constant-frequency current-mode-controlled boost converter circuit is efficient and stable in light, medium, and heavy output load conditions.

System and method for controlling DCM-CCM oscillation in a current-controlled switching mode power supply converter

Growing community of inventors

Shenzhen, China

Hai Bo Zhang