Patents by Inventor Jyi-Min Cheng

Jyi-Min Cheng 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).

  • Pulse detection circuit using amplitude and time qualification
    Patent number: 4789838
    Abstract: A magnetic recording pulse detection circuit using a combination of amplitude and time qualification. An input signal is provided to a peak detecting circuit and to a comparator for comparing the input signal to a threshold level. A time delay circuit is also provided so that a peak detection output signal is provided only if the peak exceeds the threshold value and there has been no additional peak for a predetermined period of time.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: December 6, 1988
    Inventor: Jyi-Min Cheng
  • Adaptive threshold adjustment method and apparatus
    Patent number: 4771188
    Abstract: A method and apparatus for instantaneously adjusting the threshold level for amplitude qualification in a signal peak detection system. Two threshold levels are provided, an upper threshold level and a lower threshold level. As the input signal level exceeds a first qualifying value, the amplitude threshold is set to the lower threshold level. If the input signal continues to increase and exceeds a second qualifying value higher than the first qualifying value, the amplitude threshold is set to the upper threshold level.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: September 13, 1988
    Inventors: Jyi-Min Cheng, Julian H. Van Wyngaarden