Patents Assigned to Shanghai Fudan Microelectronics Co., Ltd.
  • Input detecting circuit used for electric-leakage protection devices with self-diagnostic function
    Patent number: 7598754
    Abstract: An input detecting circuit for an electric-leakage protection device with self-diagnostic function includes an analog electric-leakage unit, a magnetic electric-leakage induction ring, an operational amplifier, and an inverse feedback circuit. The inverse feedback circuit includes a first resistance and a second circuit unit shunted with the first resistance. The second circuit unit includes a second resistance and a unidirectional break-over unit connected in series with the second resistance.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: October 6, 2009
    Assignee: Shanghai Fudan Microelectronics Co., Ltd.
    Inventors: Jun Yu, Qikang Chen
  • INPUT DETECTING CIRCUIT USED FOR ELECTRIC-LEAKAGE PROTECTION DEVICES WITH SELF-DIAGNOSTIC FUCNTION
    Publication number: 20080048667
    Abstract: An input detecting circuit for an electric-leakage protection device with self-diagnostic function includes an analog electric-leakage unit, a magnetic electric-leakage induction ring, an operational amplifier, and an inverse feedback circuit. The inverse feedback circuit includes a first resistance and a second circuit unit shunted with the first resistance. The second circuit unit includes a second resistance and a unidirectional break-over unit connected in series with the second resistance.
    Type: Application
    Filed: June 18, 2007
    Publication date: February 28, 2008
    Applicant: SHANGHAI FUDAN MICROELECTRONICS CO., LTD.
    Inventors: Jun YU, Qikang Chen