Patents by Inventor Thomas C. Lam

Thomas C. Lam 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).

  • Dispersion compensation circuitry and system for analog video transmission with direct modulated laser
    Patent number: 8369712
    Abstract: An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2?f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: February 5, 2013
    Assignee: Harmonic Inc.
    Inventors: Wei Huang, Thomas C. Lam, Li-Ping Chen
  • DISPERSION COMPENSATION CIRCUITRY AND SYSTEM FOR ANALOG VIDEO TRANSMISSION WITH DIRECT MODULATED LASER
    Publication number: 20110210777
    Abstract: An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2?f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 1, 2011
    Applicant: HARMONIC INC.
    Inventors: WEI HUANG, THOMAS C. LAM, LI-PING CHEN
  • Dispersion compensation circuitry and system for analog video transmission with direct modulated laser
    Patent number: 7945172
    Abstract: An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2?f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: May 17, 2011
    Assignee: Harmonic, Inc.
    Inventors: Wei Huang, Thomas C. Lam, Li-Ping Chen
  • Dispersion Compensation Circuitry and System for Analog Video Transmission With Direct Modulated Laser
    Publication number: 20090290880
    Abstract: An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2?f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.
    Type: Application
    Filed: May 20, 2008
    Publication date: November 26, 2009
    Applicant: HARMONIC, INC.
    Inventors: Wei Huang, Thomas C. Lam, Li-Ping Chen