Patents by Inventor Huang-Cheng Shih

Huang-Cheng Shih 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).

  • Current detector with variable output voltage level
    Patent number: 7777479
    Abstract: A current detector with variable output voltage level. The current detector includes an operational amplifier, an adjusting circuit, a load circuit for detecting current running therethrough, and a clamping circuit. The operational amplifier includes a non-inverting input, an inverting input, and an output. The operational amplifier is connected to an antenna power supply and ground. The adjusting circuit is coupled to the inverting input. The load circuit has one end is coupled to the antenna power supply, and the other end coupled to the non-inverting input. The other end of the load circuit is also a detecting node. The non-inverting input is a detecting node. The clamping circuit, coupled to the output of the operational amplifier, clamps the output voltage level of the operational amplifier to a predetermined range. When the detecting node floats, the output voltage level of the clamping circuit is at logic high.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: August 17, 2010
    Assignee: Wistron NeWeb Corp.
    Inventors: Chen-Chia Huang, Huang-Cheng Shih