Patents by Inventor Ee Wah Lim

Ee Wah Lim 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).

  • High speed digital phase interpolator with duty cycle correction circuitry
    Patent number: 11411555
    Abstract: Described is a circuit and architecture that combines phase interpolator (PI) mixer with duty cycle correction (DCC), to prevent cross contention between the tristate inverter pairs of the mixer. The control code for the p-type and n-type networks in the PI mixer are decoupled, and DCC mechanism are blended in the PI mixer code decoding scheme to enable a low latency phase interpolation and duty cycle correction. The circuit comprises a first mixer circuitry controllable by a first code; a second mixer circuitry controllable by a second code; a node coupled to outputs of the first and second mixers; and a keeper circuitry coupled to the node, wherein the first and second mixers are tri-stable mixers.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: August 9, 2022
    Assignee: Intel Corporation
    Inventors: Ee Wah Lim, Lay Leng Lim
  • HIGH SPEED DIGITAL PHASE INTERPOLATOR WITH DUTY CYCLE CORRECTION CIRCUITRY
    Publication number: 20210367588
    Abstract: Described is a circuit and architecture that combines phase interpolator (PI) mixer with duty cycle correction (DCC), to prevent cross contention between the tristate inverter pairs of the mixer. The control code for the p-type and n-type networks in the PI mixer are decoupled, and DCC mechanism are blended in the PI mixer code decoding scheme to enable a low latency phase interpolation and duty cycle correction. The circuit comprises a first mixer circuitry controllable by a first code; a second mixer circuitry controllable by a second code; a node coupled to outputs of the first and second mixers; and a keeper circuitry coupled to the node, wherein the first and second mixers are tri-stable mixers.
    Type: Application
    Filed: August 5, 2021
    Publication date: November 25, 2021
    Inventors: Ee Wah Lim, Lay Leng Lim
  • High speed digital phase interpolator with duty cycle correction circuitry
    Patent number: 11088682
    Abstract: Described is a circuit and architecture that combines phase interpolator (PI) mixer with duty cycle correction (DCC), to prevent cross contention between the tristate inverter pairs of the mixer. The control code for the p-type and n-type networks in the PI mixer are decoupled, and DCC mechanism are blended in the PI mixer code decoding scheme to enable a low latency phase interpolation and duty cycle correction. The circuit comprises a first mixer circuitry controllable by a first code; a second mixer circuitry controllable by a second code; a node coupled to outputs of the first and second mixers; and a keeper circuitry coupled to the node, wherein the first and second mixers are tri-stable mixers.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: August 10, 2021
    Assignee: Intel Corporation
    Inventors: Ee Wah Lim, Lay Leng Lim
  • HIGH SPEED DIGITAL PHASE INTERPOLATOR WITH DUTY CYCLE CORRECTION CIRCUITRY
    Publication number: 20200195240
    Abstract: Described is a circuit and architecture that combines phase interpolator (PI) mixer with duty cycle correction (DCC), to prevent cross contention between the tristate inverter pairs of the mixer. The control code for the p-type and n-type networks in the PI mixer are decoupled, and DCC mechanism are blended in the PI mixer code decoding scheme to enable a low latency phase interpolation and duty cycle correction. The circuit comprises a first mixer circuitry controllable by a first code; a second mixer circuitry controllable by a second code; a node coupled to outputs of the first and second mixers; and a keeper circuitry coupled to the node, wherein the first and second mixers are tri-stable mixers.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 18, 2020
    Applicant: Intel Corporation
    Inventors: Ee Wah Lim, Lay Leng Lim