Patents by Inventor Loke K. Tan

Loke K. Tan 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).

  • Patent number: 10749715
    Abstract: Systems and methods for cable transmission are provided. The system includes an up-tilt circuit, a digital-to-analog converter, and a power amplifier. The up-tilt circuit is configured to receive an input digital signal that has a flat spectrum and generate an up-tilted digital signal that has an up-tilted spectrum. The digital-to-analog converter is configured to receive the up-tilted digital signal and to provide an analog signal. The power amplifier is configured to receive the analog signal and amplify the analog signal for cable transmission.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: August 18, 2020
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Tae Youn Kim, Loke K. Tan, Lin He
  • Publication number: 20190349227
    Abstract: Systems and methods for cable transmission are provided. The system includes an up-tilt circuit, a digital-to-analog converter, and a power amplifier. The up-tilt circuit is configured to receive an input digital signal that has a flat spectrum and generate an up-tilted digital signal that has an up-tilted spectrum. The digital-to-analog converter is configured to receive the up-tilted digital signal and to provide an analog signal. The power amplifier is configured to receive the analog signal and amplify the analog signal for cable transmission.
    Type: Application
    Filed: September 14, 2018
    Publication date: November 14, 2019
    Inventors: Tae Youn Kim, Loke K. Tan, Lin He
  • Patent number: 10141960
    Abstract: Systems and methods relate to providing a transmit signal. The transmit signal can be provided in a transmitter circuit including a main pre-equalizer, a main power amplifier in communication with the main pre-equalizer, a replica pre-equalizer, and a replica power amplifier in communication with the replica pre-equalizer. The replica preamplifier is in communication with the main pre-equalizer, and control signals are provided to the main pre-equalizer to reduce distortion. The control signals are provided in response to an output signal of the replica power amplifier.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 27, 2018
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Loke K. Tan, Takayuki Hayashi, Lin He, Giuseppe Cusmai, Chun-ying Chen
  • Publication number: 20180123622
    Abstract: Systems and methods relate to providing a transmit signal. The transmit signal can be provided in a transmitter circuit including a main pre-equalizer, a main power amplifier in communication with the main pre-equalizer, a replica pre-equalizer, and a replica power amplifier in communication with the replica pre-equalizer. The replica preamplifier is in communication with the main pre-equalizer, and control signals are provided to the main pre-equalizer to reduce distortion. The control signals are provided in response to an output signal of the replica power amplifier.
    Type: Application
    Filed: November 29, 2016
    Publication date: May 3, 2018
    Applicant: BROADCOM CORPORATION
    Inventors: Loke K. Tan, Takayuki Hayashi, Lin He, Giuseppe Cusmai, Chun-ying Chen
  • Patent number: 7916816
    Abstract: Hardware allocation techniques are described for use in a multi-channel communication environment. The techniques may be used to reduce the number of gates needed for processing and/or to improve the efficiency and/or speed of a communication system. For example, resources that are under-utilized may be removed or allocated to another operation or user. In an exemplary implementation, a receiver includes a plurality of signal processing modules corresponding to respective channels and a hardware allocation module. The hardware allocation module allocates resources in the signal processing modules based on utilization of at least one of the resources.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: March 29, 2011
    Assignee: Broadcom Corporation
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Loke K. Tan, Hanli Zou, Jonathan S. Min
  • Patent number: 7317772
    Abstract: Carrier signals modulated by information (video and/or data) signals are received through a cable and are converted to modulated signals at an intermediate frequency. The IF signals are sampled at a particular frequency to produce digital information signals. The digital information signals are introduced to a variable interpolator which produces first digital signals. The first digital signals are introduced to a complex multiplier which produces second digital signals. The second digital signals pass to an adaptive equalizer which selects for each of the second signals in accordance with the amplitude of such second signals, an individual one of a multitude of amplitude levels involved in quadrature amplitude modulation. These selected amplitude levels represent the information (video and/or data). The output signals from the adaptive equalizer are introduced to a first signal recovery loop which includes a first numerically controlled oscillator.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: January 8, 2008
    Assignee: Broadcom Corporation
    Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
  • Publication number: 20070263754
    Abstract: Hardware allocation techniques are described for use in a multi-channel communication environment. The techniques may be used to reduce the number of gates needed for processing and/or to improve the efficiency and/or speed of a communication system. For example, resources that are under-utilized may be removed or allocated to another operation or user. In an exemplary implementation, a receiver includes a plurality of signal processing modules corresponding to respective channels and a hardware allocation module. The hardware allocation module allocates resources in the signal processing modules based on utilization of at least one of the resources.
    Type: Application
    Filed: May 14, 2007
    Publication date: November 15, 2007
    Applicant: Broadcom Corporation
    Inventors: Bruce J. Currivan, Thomas J. Kolze, Loke K. Tan, Hanli Zou, Johnathan S. Min
  • Publication number: 20040022327
    Abstract: Carrier signals modulated by information (video and/or data) signals are received through a cable and are converted to modulated signals at an intermediate frequency. The IF signals are sampled at a particular frequency to produce digital information signals. The digital information signals are introduced to a variable interpolator which produces first digital signals. The first digital signals are introduced to a complex multiplier which produces second digital signals. The second digital signals pass to an adaptive equalizer which selects for each of the second signals in accordance with the amplitude of such second signals, an individual one of a multitude of amplitude levels involved in quadrature amplitude modulation. These selected amplitude levels represent the information (video and/or data). The output signals from the adaptive equalizer are introduced to a first signal recovery loop which includes a first numerically controlled oscillator.
    Type: Application
    Filed: April 23, 2003
    Publication date: February 5, 2004
    Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
  • Patent number: 6570942
    Abstract: Carrier signals modulated by information (video and/or data) signals are received through a cable and are converted to modulated signals at an intermediate frequency. The IF signals are sampled at a particular frequency to produce digital information signals. The digital information signals are introduced to a variable interpolator which produces first digital signals. The first digital signals are introduced to a complex multiplier which produces second digital signals. The second digital signals pass to an adaptive equalizer which selects for each of the second signals in accordance with the amplitude of such second signals, an individual one of a multitude of amplitude levels involved in quadrature amplitude modulation. These selected amplitude levels represent the information (video and/or data). The output signals from the adaptive equalizer are introduced to a first signal recovery loop which includes a first numerically controlled oscillator.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: May 27, 2003
    Assignee: Broadcom Corporation
    Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
  • Publication number: 20010040931
    Abstract: Carrier signals modulated by information (video and/or data) signals are received through a cable and are converted to modulated signals at an intermediate frequency. The IF signals are sampled at a particular frequency to produce digital information signals. The digital information signals are introduced to a variable interpolator which produces first digital signals. The first digital signals are introduced to a complex multiplier which produces second digital signals. The second digital signals pass to an adaptive equalizer which selects for each of the second signals in accordance with the amplitude of such second signals, an individual one of a multitude of amplitude levels involved in quadrature amplitude modulation. These selected amplitude levels represent the information (video and/or data). The output signals from the adaptive equalizer are introduced to a first signal recovery loop which includes a first numerically controlled oscillator.
    Type: Application
    Filed: July 12, 2001
    Publication date: November 15, 2001
    Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
  • Patent number: 6304621
    Abstract: Carrier signals modulated by information (video and/or data) signals are received through a cable and are converted to modulated signals at an intermediate frequency. The IF signals are sampled at a particular frequency to produce digital information signals. The digital information signals are introduced to a variable interpolator which produces first digital signals. The first digital signals are introduced to a complex multiplier which produces second digital signals. The second digital signals pass to an adaptive equalizer which selects for each of the second signals in accordance with the amplitude of such second signals, an individual one of a multitude of amplitude levels involved in quadrature amplitude modulation. These selected amplitude levels represent the information (video and/or data). The output signals from the adaptive equalizer are introduced to a first signal recovery loop which includes a first numerically controlled oscillator.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: October 16, 2001
    Assignee: Broadcom Corporation
    Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam