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).
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Patent number: 10749715Abstract: 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: GrantFiled: September 14, 2018Date of Patent: August 18, 2020Assignee: Avago Technologies International Sales Pte. LimitedInventors: Tae Youn Kim, Loke K. Tan, Lin He
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Publication number: 20190349227Abstract: 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: ApplicationFiled: September 14, 2018Publication date: November 14, 2019Inventors: Tae Youn Kim, Loke K. Tan, Lin He
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Patent number: 10141960Abstract: 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: GrantFiled: November 29, 2016Date of Patent: November 27, 2018Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Loke K. Tan, Takayuki Hayashi, Lin He, Giuseppe Cusmai, Chun-ying Chen
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Publication number: 20180123622Abstract: 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: ApplicationFiled: November 29, 2016Publication date: May 3, 2018Applicant: BROADCOM CORPORATIONInventors: Loke K. Tan, Takayuki Hayashi, Lin He, Giuseppe Cusmai, Chun-ying Chen
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Patent number: 7916816Abstract: 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: GrantFiled: May 14, 2007Date of Patent: March 29, 2011Assignee: Broadcom CorporationInventors: Bruce J. Currivan, Thomas J. Kolze, Loke K. Tan, Hanli Zou, Jonathan S. Min
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Patent number: 7317772Abstract: 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: GrantFiled: April 23, 2003Date of Patent: January 8, 2008Assignee: Broadcom CorporationInventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
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Publication number: 20070263754Abstract: 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: ApplicationFiled: May 14, 2007Publication date: November 15, 2007Applicant: Broadcom CorporationInventors: Bruce J. Currivan, Thomas J. Kolze, Loke K. Tan, Hanli Zou, Johnathan S. Min
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Publication number: 20040022327Abstract: 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: ApplicationFiled: April 23, 2003Publication date: February 5, 2004Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
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Patent number: 6570942Abstract: 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: GrantFiled: July 12, 2001Date of Patent: May 27, 2003Assignee: Broadcom CorporationInventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
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Publication number: 20010040931Abstract: 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: ApplicationFiled: July 12, 2001Publication date: November 15, 2001Inventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam
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Patent number: 6304621Abstract: 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: GrantFiled: May 13, 1998Date of Patent: October 16, 2001Assignee: Broadcom CorporationInventors: Henry Samueli, Loke K. Tan, Jeffrey S. Putnam