Patents Assigned to Zeelan Technology, Inc.
  • Patent number: 5444459
    Abstract: A signal acquisition system using an ultra-wide time range digitizer with variable time interval data sampling and data storage includes signal conditioning and sampling stages, a digitizing stage for generating digital representations of a signal, and a memory for storing the digital representations. Timing circuitry controls sampling and digitizing which may be varied so as to acquire signals on linear, logarithmic, or other time bases. Signal compression may be obtained by digitizing information only when a desired change rate is observed. A display allows acquired signals to be displayed in linear, logarithmic or other manner.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: August 22, 1995
    Assignee: Zeelan Technology, Inc.
    Inventor: Hiro Moriyasu
  • Patent number: 5349539
    Abstract: An electronic circuit parameter extraction system is provided with a pulse signal forcing generator, an interface to a device under test (DUT), a signal digitizer, a timebase to control the digitizing interval, a data processor to extract DUT essential root parameters, a circuit and/or system simulator to generate signals from the extracted parameters, and a display system to view acquired and/or simulated signals, and is able to compare simulated signals with previously acquired signals. The circuit parameter extraction system further allows extraction of realistic behavioral model parameters which may be used as a component library model within a computer aided engineering (CAE) simulator, allowing improved convergence between the results obtained with the CAE simulator and the physical circuit system response being modeled.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: September 20, 1994
    Assignee: Zeelan Technology, Inc.
    Inventor: Hiro Moriyasu
  • Patent number: 5243343
    Abstract: A signal acquisition system using an ultra-wide time range digitizer with variable time interval data sampling and data storage includes signal conditioning and sampling stages, a digitizing stage for generating digital representations of a signal, and a memory for storing the digital representations. Timing circuitry controls sampling and digitizing which may be varied so as to acquire signals on linear, logarithmic, or other time bases. Signal compression may be obtained by digitizing information only when a desired change rate is observed. A display allows acquired signals to be displayed in linear, logarithmic or other manner.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: September 7, 1993
    Assignee: Zeelan Technology, Inc.
    Inventor: Hiro Moriyasu