Fih (hong Kong) Limited

Shenzhen Futaihong Precision Industry Co., Ltd.

Astec International Limited

Shenzhen Free Interactive Inc.

Huawei Technologies Co., Limited

Zte Corporation

Bing Zhang

Mei Qin

Lian Liang

Zhishuo Li

Wenyong Liu

Weidong Zhang

Xuegang Lv

Lixin Tong

Nai-Lin Yang

Qiang Wang

Qian Yu

Xiaodong Fan

Xi Yang

Shi-Feng Wang

Yong Song

Junsong Yi

Fu-Keng Yang

Jian-Jun Zhan

Deng He

Shao-Lin Yang

Xin Wei

Wen-Bin Sun

Guozhen Wang

Yi-Ping Zeng

A method of regulating an output voltage of a switched mode power supply having a variable input voltage and at least one power switch is provided. The method includes generating a control signal for the at least one power switch of the switched mode power supply based at least in part on a control voltage, the control signal having a duty cycle. The method also includes generating a reference voltage based at least in part on the duty cycle of the control signal and a maximum duty cycle, and generating the control voltage based at least in part on the reference voltage and the output voltage.

Control circuits and methods for regulating output voltages

A switched mode power supply includes a power circuit and a control circuit coupled to the power circuit for regulating its output voltage. The control circuit is configured to generate a control signal for at least one power switch of the power circuit using a reference voltage, determine if a duty cycle of the control signal is within a defined range, sense one or more output parameters of the power circuit including the output voltage of the power circuit, and in response to determining the duty cycle of the control signal is outside the defined range, adjust the reference voltage to adjust the duty cycle of the control signal. The reference voltage is adjustable over time to thereby linearly adjust the output voltage of the power circuit. Other example switched mode power supplies, control circuits, and methods for regulating output voltages of switched mode power supplies are also disclosed.

Regulated switched mode power supplies having adjustable output voltages

A switched mode power supply comprises a communication interface including an address terminal configured to couple to an external resistor for setting a communication address of the switched mode power supply. A control circuit is configured to determine the value of the external resistor a first time with a first technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the first technique if the value of the external resistor is greater than the threshold value. The control circuit is also configured to, if the value of the external resistor is less than the threshold value, determine the value of the external resistor a second time with a second technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the second technique.

Switched mode power supplies with configurable communication addresses

A switched mode power supply includes a communication interface and an address terminal for setting a communication address for the power supply using the resistance of an external resistor when the external resistor is coupled to the address terminal. The power supply is configured to determine a first resistance value for the external resistor using a first technique, determine a second resistance value for the external resistor using a second technique, set the communication address of the power supply using the first resistance value if the first resistance value is greater than a threshold value, and set the communication address of the power supply using the second resistance value if the first resistance value is less than the threshold value. Other example switched mode power supplies, power systems including one or more power supplies, and methods for setting a communication address of a power supply are also disclosed.

A wearable electronic device includes a housing, an electronic module received in the housing, and a cover assembly. The cover assembly includes a cover and a rotating member. A first end of the rotating member is rotatably connected to the cover. A second end of the rotating member is detachably latched to the cover. When the rotating member is latched to the cover, the rotating member resists against the housing.

Wearable electronic device

Vibrator

A cover for an electronic device includes a display window and a cover body injection molded with the display window. The display window includes a window body and at least one protruding portion projecting form the window body. The cover body includes a cover wall and ribs. The window body includes a front surface, a rear surface and a peripheral surface connecting the front surface and the rear surface. The at least one protruding portion is fixed on the peripheral surface and embedded between the cover wall and the ribs.

Manufacturing method and cover for electronic device

A chip card holder is used for assembling a chip card. The chip card holder includes a housing and a latching cover. The housing includes a top wall and a sidewall connected to the top wall. The top wall defines a receiving slot, and the chip card is exposed from the receiving slot. The sidewall defines an opening communicating with the receiving slot. The latching cover is rotatably assembled to the housing to cover the opening.

Chip card holder and electronic device using the same

A housing for a wireless communication device includes a decorative film having an antenna pattern formed thereon, a protective coating covering the antenna pattern, and a substrate moldingly attached to the decorative film and the protective coating. The antenna pattern is a conductive ink coating. The antenna pattern and the protective coating are sandwiched between the decorative film and the substrate.

Housing, wireless communication device using the housing, and manufacturing method thereof

A method for implementing a ring back tone, including: receiving, by a first Service Control Point, an intelligent service request triggered by a Service Switching Point, based on a call of a calling party; obtaining personal ring back tone information of a called party and/or group ring back tone information of a group which the called party belongs to; acquiring first ring back tone information according to the personal ring back tone information and/or the group ring back tone information delivering a connect message containing the first ring back tone information to the Service Switching Point the connect message being used to instruct the Service Switching Point to connect the call to an Advanced Intelligent Peripheral for playing the ring back tone to the calling party according to the first ring back tone information.

Method and system for implementing ring back tone

A method for manufacturing plastic product includes the steps of: forming a work piece () in an injection molding apparatus, the work piece () including at least an original product (), a butt end (), and gate (), the gate () connecting a corresponding original product () with the butt end (); precutting the gate () in a mold before the work piece () has completely cooled; removing the work piece () from the injection molding apparatus; separating each original product ().

Method for manufacturing plastic products

Growing community of inventors

Shenzhen, China

Bing Zhang