Patents by Inventor GENG XIANG LEE @ TITUS LEE

GENG XIANG LEE @ TITUS LEE 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).

  • Intrinsically safe audio power current circuit and device using same
    Patent number: 9450636
    Abstract: An intrinsically safe audio power circuit includes redundant electronic fuses disposed between the power input of an audio power amplifier and the battery source of the portable two-way radio device. The electronic fuse circuits are connected in series with each other, and each electronic fuse circuit includes a series switch transistor that can shut off the flow of current between the battery and the audio power amplifier. Each electronic fuse circuit also includes a current sense portion, and when the current through the electronic fuse circuits reaches a current threshold, it will shut off its series switch transistor using an active bias circuit in order to ensure sufficiently rapid shut off.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: September 20, 2016
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Chen Kok Yeoh, Friedrich Josef Bollmann, Geng Xiang Lee @ Titus Lee, Joo Yih See
  • INTRINSICALLY SAFE AUDIO POWER CURRENT CIRCUIT AND DEVICE USING SAME
    Publication number: 20160191104
    Abstract: An intrinsically safe audio power circuit includes redundant electronic fuses disposed between the power input of an audio power amplifier and the battery source of the portable two-way radio device. The electronic fuse circuits are connected in series with each other, and each electronic fuse circuit includes a series switch transistor that can shut off the flow of current between the battery and the audio power amplifier. Each electronic fuse circuit also includes a current sense portion, and when the current through the electronic fuse circuits reaches a current threshold, it will shut off its series switch transistor using an active bias circuit in order to ensure sufficiently rapid shut off.
    Type: Application
    Filed: December 30, 2014
    Publication date: June 30, 2016
    Inventors: CHEN KOK YEOH, FRIEDRICH JOSEF BOLLMANN, GENG XIANG LEE @ TITUS LEE, JOO YIH SEE