Patents by Inventor Lysander Lim
Lysander 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).
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Publication number: 20190235050Abstract: A radar sensing system includes a transmitter and a receiver. The transmitter is configured for installation and use in a vehicle and configured to transmit radio signals. The receiver is configured for installation and use in the vehicle and configured to receive radio signals that include the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment. The receiver includes a plurality of inputs and a plurality of low noise amplifiers (LNAs). Each input of the plurality of inputs is communicatively coupled to a corresponding LNA of the plurality of LNAs. The plurality of LNAs are co-located, and respective outputs of the plurality of LNAs are all directly coupled together at a connection point.Type: ApplicationFiled: January 28, 2019Publication date: August 1, 2019Inventors: James Maligeorgos, Aria Eshraghi, Ryan Lobo, Lysander Lim, Vito Giannini, Marius Goldenberg
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Patent number: 8184683Abstract: In one embodiment, the present invention includes a transceiver coupled to a baseband processor to receive digital control information that includes both event and schedule information, and which stores the digital control information in a storage of the transceiver. The transceiver may then be operated according to the event and schedule information.Type: GrantFiled: February 15, 2011Date of Patent: May 22, 2012Assignee: Silicon Laboratories Inc.Inventors: Brian D. Green, Srihari Adireddy, Lysander Lim, Ramkishore Ganti
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Publication number: 20110230145Abstract: In one embodiment, a method includes detecting a power level of a power amplifier coupled to a transceiver during a current burst of a radio communication and providing the detected power level from the power amplifier to the transceiver and controlling a power level of the power amplifier during a next burst based on the detected power level of the current burst.Type: ApplicationFiled: May 27, 2011Publication date: September 22, 2011Inventors: Lysander Lim, David Pehlke, John Khoury, Vincent Leung
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Patent number: 8023556Abstract: In one implementation, a method includes receiving control information in a transceiver from a baseband processor and computing ramp values in the transceiver based on the control information. The ramp values may be computed in a signal generator of the transceiver such as an algorithmic generator. Depending on mode of operation, the ramp values may be provided to a power amplifier or a gain block of the transceiver.Type: GrantFiled: March 30, 2007Date of Patent: September 20, 2011Assignee: Silicon Laboratories Inc.Inventors: Brian D. Green, Lysander Lim, Kishore Ganti
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Patent number: 7974596Abstract: In one embodiment, a method includes detecting a power level of a power amplifier coupled to a transceiver during a current burst of a radio communication and providing the detected power level from the power amplifier to the transceiver and controlling a power level of the power amplifier during a next burst based on the detected power level of the current burst.Type: GrantFiled: December 27, 2006Date of Patent: July 5, 2011Assignee: Silicon Laboratories Inc.Inventors: Lysander Lim, David Pehlke, John Khoury, Vincent Leung
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Publication number: 20110134974Abstract: In one embodiment, the present invention includes a transceiver coupled to a baseband processor to receive digital control information that includes both event and schedule information, and which stores the digital control information in a storage of the transceiver. The transceiver may then be operated according to the event and schedule information.Type: ApplicationFiled: February 15, 2011Publication date: June 9, 2011Inventors: Brian D. Green, Srihari Adireddy, Lysander Lim, Ramkishore Ganti
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Patent number: 7907657Abstract: In one embodiment, the present invention includes a transceiver coupled to a baseband processor to receive digital control information that includes both event and schedule information, and which stores the digital control information in a storage of the transceiver. The transceiver may then be operated according to the event and schedule information.Type: GrantFiled: June 30, 2006Date of Patent: March 15, 2011Assignee: Silicon Laboratories Inc.Inventors: Brian D. Green, Srihari Adireddy, Lysander Lim, Ramkishore Ganti
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Patent number: 7689190Abstract: A technique includes generating an analog voltage to control a frequency for an oscillator. The analog signal is converted into a digital signal, and the frequency is controlled in response to the digital signal.Type: GrantFiled: April 22, 2005Date of Patent: March 30, 2010Assignee: ST-Ericsson SAInventors: Donald A. Kerth, James P. Maligeorgos, Dylan A. Hester, Lysander Lim, Augusto M. Marques, G. Tyson Tuttle
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Patent number: 7583937Abstract: In one embodiment, the present invention includes a method for receiving at a transceiver from a baseband processor digital control information that includes both event and schedule information, storing the digital control information in a storage of the transceiver, and operating the transceiver according to the event and schedule information.Type: GrantFiled: December 13, 2005Date of Patent: September 1, 2009Assignee: Silicon Laboratories Inc.Inventors: Brian D. Green, Srihari Adireddy, Lysander Lim, Ramkishore Ganti
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Publication number: 20080240211Abstract: In one implementation, a method includes receiving control information in a transceiver from a baseband processor and computing ramp values in the transceiver based on the control information. The ramp values may be computed in a signal generator of the transceiver such as an algorithmic generator. Depending on mode of operation, the ramp values may be provided to a power amplifier or a gain block of the transceiver.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Inventors: Brian D. Green, Lysander Lim, Kishore Ganti
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Patent number: 7394329Abstract: An oscillator includes a plurality of varactor cells to receive a control signal to control a frequency of the oscillator. Each of the varactor cells includes a switch that includes a first terninal to receive the control signal and a second terminal such that the switch operates to control a capacitance of the varactor cell in response to a voltage between the first and second terminals. The oscillator includes a bias circuit to provide a different bias voltage to each second terminal and an amplifier that is coupled to the varactor cells to generate an oscillating signal.Type: GrantFiled: September 14, 2005Date of Patent: July 1, 2008Assignee: Silicon Laboratories Inc.Inventors: Peter Vancorenland, Lysander Lim, Augusto M. Marques, Scott D. Willingham
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Publication number: 20080076378Abstract: In one embodiment, a method includes detecting a power level of a power amplifier coupled to a transceiver during a current burst of a radio communication and providing the detected power level from the power amplifier to the transceiver and controlling a power level of the power amplifier during a next burst based on the detected power level of the current burst.Type: ApplicationFiled: December 27, 2006Publication date: March 27, 2008Inventors: Lysander Lim, David Pehlke, John Khoury, Vincent Leung
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Patent number: 7285940Abstract: A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply, second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply, and third circuitry configured to maintain the regulated voltage at a substantially constant value in response to a current drawn by the digital circuitry.Type: GrantFiled: September 7, 2005Date of Patent: October 23, 2007Assignee: NXP B.V.Inventors: Donald A. Kerth, Russell Croman, Brian D. Green, Lysander Lim, James Maligeorgos, Xiachuan Guo, Augusto M. Marques
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Patent number: 7242912Abstract: Components of a radio-frequency (RF) apparatus including transceiver circuitry and frequency modification circuitry of a crystal oscillator circuit that generates a reference signal with adjustable frequency may be partitioned in a variety of ways, for example, as one or more separate integrated circuits. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may include at least one variable capacitance device and may be employed to generate a reference signal with adjustable frequency. The adjustable reference signal may be provided to other components of the RF apparatus and/or the RF apparatus may be configured to provide the adjustable reference signal to baseband processor circuitry.Type: GrantFiled: July 31, 2003Date of Patent: July 10, 2007Assignee: Silicon Laboratories Inc.Inventors: James Maligeorgos, Augusto M. Marques, Lysander Lim, G. Tyson Tuttle, Aslamali A. Rafi, Tod Paulus, Gregory T. Uehara, Jeffrey W. Scott, Richard T. Behrens, Donald A. Kerth, G. Diwakar Vishakhadatta, Vishnu S. Srinivasan, Caiyi Wang
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Patent number: 7221921Abstract: Components of a radio-frequency (RF) apparatus including transceiver circuitry and frequency modification circuitry of a crystal oscillator circuit that generates a reference signal with adjustable frequency may be partitioned in a variety of ways, for example, as one or more separate integrated circuits. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may include at least one variable capacitance device and may be employed to generate a reference signal with adjustable frequency. The adjustable reference signal may be provided to other components of the RF apparatus and/or the RF apparatus may be configured to provide the adjustable reference signal to baseband processor circuitry.Type: GrantFiled: December 8, 2003Date of Patent: May 22, 2007Assignee: Silicon LaboratoriesInventors: James Maligeorgos, Augusto M. Marques, Lysander Lim, G. Tyson Tuttle, Aslamali A. Rafi, Tod Paulus, Gregory T. Uehara, Jeffrey W. Scott, Richard T. Behrens, Donald A. Kerth, G. Diwakar Vishakhadatta, Vishnu S. Srinivasan, Caiyi Wang
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Patent number: 7200364Abstract: Frequency modification circuitry may be employed as part of a crystal oscillator circuit to generate a reference signal with adjustable frequency. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may adjust the frequency of the reference signal in response to one or more frequency control signals. In one example, the frequency modification circuitry may include variable capacitors such as one or more continuously variable and/or discretely variable capacitors for providing coarse and/or fine adjustment of the reference signal frequency.Type: GrantFiled: December 23, 2005Date of Patent: April 3, 2007Assignee: Silicon LaboratoriesInventors: Lysander Lim, James Maligeorgos
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Publication number: 20070057743Abstract: An oscillator includes a plurality of varactor cells to receive a control signal to control a frequency of the oscillator. Each of the varactor cells includes a switch that includes a first terninal to receive the control signal and a second terminal such that the switch operates to control a capacitance of the varactor cell in response to a voltage between the first and second terminals. The oscillator includes a bias circuit to provide a different bias voltage to each second terminal and an amplifier that is coupled to the varactor cells to generate an oscillating signal.Type: ApplicationFiled: September 14, 2005Publication date: March 15, 2007Inventors: Peter Vancorenland, Lysander Lim, Augusto Marques, Scott Willingham
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Publication number: 20070058749Abstract: A technique includes storing in a memory a set of samples that are distorted so that the samples indicate a distorted representation of a modulation signal. The technique includes in response to the set of samples, generating a second signal that includes a substantially less distorted representation of the modulation signal. The distortion of the samples is used to at least partially compensate for a characteristic that is otherwise imparted to the second signal by the act of generating the second signal.Type: ApplicationFiled: September 14, 2005Publication date: March 15, 2007Inventors: Aria Eshraghi, Lysander Lim, Zhongda Wang
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Publication number: 20070054629Abstract: Components of a radio-frequency (RF) apparatus including transceiver circuitry and frequency modification circuitry of a crystal oscillator circuit that generates a reference signal with adjustable frequency may be partitioned in a variety of ways, for example, as one or more separate integrated circuits. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may include at least one variable capacitance device and may be employed to generate a reference signal with adjustable frequency. The adjustable reference signal may be provided to other components of the RF apparatus and/or the RF apparatus may be configured to provide the adjustable reference signal to baseband processor circuitry.Type: ApplicationFiled: December 8, 2003Publication date: March 8, 2007Inventors: James Maligeorgos, Augusto Marques, Lysander Lim, G. Tuttle, Aslamali Rafi, Tod Paulus, Gregory Uehara, Jeffrey Scott, Richard Behrens, Donald Kerth, G. Vishakhadatta, Vishnu Srinivasan, Caiyi Wang
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Publication number: 20070052396Abstract: A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply, second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply, and third circuitry configured to maintain the regulated voltage at a substantially constant value in response to a current drawn by the digital circuitry.Type: ApplicationFiled: September 7, 2005Publication date: March 8, 2007Inventors: Donald Kerth, Russell Croman, Brian Green, Lysander Lim, James Maligeorgos, Xiachuan Guo, Augusto Marques