Patents by Inventor Feng-Chang Yan

Feng-Chang Yan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual-mode charger circuit
    Patent number: 8269467
    Abstract: A dual-mode charger circuit includes a first charge circuit and a second charge circuit connected in parallel between a power source and a battery, to charge the battery under a slow charge mode and a quick charge mode. A central processing unit detects a capacity of the battery and determines whether the detected capacity exceeds a predetermined capacity, and outputs a mode control signal according to the determination. A mode switch circuit switches the second charger circuit on/off according to the mode control signal. When the second charge circuit is off, the battery is charged under the slow charge mode, and when the second charge circuit is on, the battery is charged under the quick charge mode.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: September 18, 2012
    Assignees: Ambit Microsystems (Shanghai) Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Rong Li, Feng-Chang Yan, Jian-Jun Liu
  • DUAL-MODE CHARGER CIRCUIT
    Publication number: 20110133701
    Abstract: A dual-mode charger circuit includes a first charge circuit and a second charge circuit connected in parallel between a power source and a battery, to charge the battery under a slow charge mode and a quick charge mode. A central processing unit detects a capacity of the battery and determines whether the detected capacity exceeds a predetermined capacity, and outputs a mode control signal according to the determination. A mode switch circuit switches the second charger circuit on/off according to the mode control signal. When the second charge circuit is off, the battery is charged under the slow charge mode, and when the second charge circuit is on, the battery is charged under the quick charge mode.
    Type: Application
    Filed: January 12, 2010
    Publication date: June 9, 2011
    Applicants: AMBIT MICROSYSTEMS (SHANGHAI) LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: RONG LI, FENG-CHANG YAN, JIAN-JUN LIU