Patents by Inventor Joel Yang Kwang Wei

Joel Yang Kwang Wei 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).

  • Electro-optic waveform analysis process
    Patent number: 11125815
    Abstract: A reconfigurable optic probe is used to measure signals from a device under test. The reconfigurable optic probe is positioned at a target probe location within a cell of the device under test. The cell including a target net to be measured and non-target nets. A test pattern is applied to the cell and a laser probe (LP) waveform is obtained in response. A target net waveform is extracted from the LP waveform by: i) configuring the reconfigurable optic probe to produce a ring-shaped beam having a relatively low-intensity region central to the ring-shaped beam; (ii) re-applying the test pattern to the cell at the target probe location with the relatively low-intensity region applied to the target net and obtaining a cross-talk LP waveform in response; (iii) normalizing the cross-talk LP waveform; and (iv) determining a target net waveform by subtracting the normalized cross-talk LP waveform from the LP waveform.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: September 21, 2021
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Venkat Krishnan Ravikumar, Jiann Min Chin, Joel Yang Kwang Wei, Pey Kin Leong
  • ELECTRO-OPTIC WAVEFORM ANALYSIS PROCESS
    Publication number: 20210096174
    Abstract: A reconfigurable optic probe is used to measure signals from a device under test. The reconfigurable optic probe is positioned at a target probe location within a cell of the device under test. The cell including a target net to be measured and non-target nets. A test pattern is applied to the cell and a laser probe (LP) waveform is obtained in response. A target net waveform is extracted from the LP waveform by: i) configuring the reconfigurable optic probe to produce a ring-shaped beam having a relatively low-intensity region central to the ring-shaped beam; (ii) re-applying the test pattern to the cell at the target probe location with the relatively low-intensity region applied to the target net and obtaining a cross-talk LP waveform in response; (iii) normalizing the cross-talk LP waveform; and (iv) determining a target net waveform by subtracting the normalized cross-talk LP waveform from the LP waveform.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 1, 2021
    Applicant: Advanced Micro Devices, Inc.
    Inventors: Venkat Krishnan Ravikumar, Jiann Min Chin, Joel Yang Kwang Wei, Pei Kin Leong