Patents by Inventor Chang Yi Yang

Chang Yi Yang 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).

  • Clock down sensor
    Patent number: 6919741
    Abstract: A clock down sensor mainly comprises a converter and a low-pass filter. The converter is used to convert an input signal from a PECL (Positive Emitter Coupling Logic) signal to a TTL (Transistor Transistor Logic) signal, the low pass filter is used to obtain a DC (Direct Current) level of the TTL signal. Thereby, the sensor can judge whether the clock signal is terminated according to the potential of the output signal in order to emit a warning so that a breakdown elimination inquiry can be done or automatic breakdown elimination can be processed earlier.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: July 19, 2005
    Assignee: Asia Optical Co., LTD
    Inventor: Chang Yi Yang