Patents by Inventor James Maligeorgos
James Maligeorgos 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: 7653356Abstract: A wireless communication device is disclosed wherein isolation buffers couple to respective active circuits or stages of the device to convey test information regarding such active circuits to a test data line from which status information may be collected. The communication device operates in two modes, namely a normal operational mode wherein the isolation buffers effectively short spurious emissions from the active circuits to a ground, and a test mode wherein the isolation buffers may convey test information from a selected active circuit to the test data line. The isolation buffers prevent spurious emissions from escaping the active circuits to which they are coupled and prevent spurious emissions from traveling from active circuit to active circuit over the test data line throughout the wireless device.Type: GrantFiled: January 27, 2006Date of Patent: January 26, 2010Assignee: Silicon Laboratories Inc.Inventors: Donald A. Kerth, James Maligeorgos, Xiaochuan Guo, Augusto Manuel Marques
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Publication number: 20080118013Abstract: A method and apparatus is provided for use in a time domain isolated apparatus in which the operation of various radio-interfering circuits can be altered or controlled to mitigate levels of interference to the radio to acceptable levels based on current or predicted link requirements. Techniques are provided that allow some use of signal processing and other digital circuitry while the RF circuitry is operating.Type: ApplicationFiled: November 21, 2006Publication date: May 22, 2008Inventors: Marvin L. Vis, James Maligeorgos, G. Diwakar Vishakhadatta, Russell Croman
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Publication number: 20080119140Abstract: A method and apparatus is provided for use in a time domain isolated apparatus in which the operation of various radio-interfering circuits can be altered or controlled to mitigate levels of interference to the radio to acceptable levels based on current or predicted link requirements. Techniques are provided that allow some use of signal processing and other digital circuitry while the RF circuitry is operating.Type: ApplicationFiled: November 21, 2006Publication date: May 22, 2008Inventors: James Maligeorgos, Marvin L. Vis, G. Diwakar Vishakhadatta, Russell Croman
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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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Publication number: 20070099586Abstract: A wireless communication device is disclosed wherein isolation buffers couple to respective active circuits or stages of the device to convey test information regarding such active circuits to a test data line from which status information may be collected. The communication device operates in two modes, namely a normal operational mode wherein the isolation buffers effectively short spurious emissions from the active circuits to a ground, and a test mode wherein the isolation-buffers may convey test information from a selected active circuit to the test data line. The isolation buffers prevent spurious emissions from escaping the active circuits to which they are coupled and prevent spurious emissions from traveling from active circuit to active circuit over the test data line throughout the wireless device.Type: ApplicationFiled: November 1, 2005Publication date: May 3, 2007Applicant: Silicon Laboratories Inc.Inventors: Donald Kerth, James Maligeorgos, Xiaochuan Guo, Augusto Marques
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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: 20070057739Abstract: In one embodiment, the present invention includes a capacitor array that may provide a selected capacitance to a digitally controlled crystal oscillator (DCXO). The array may include multiple sections each having at least one array portion, where each section is to receive different significant portions of a digital control value. The different sections may have different coding schemes. Other embodiments are described and claimed.Type: ApplicationFiled: September 14, 2005Publication date: March 15, 2007Inventors: James Maligeorgos, Donald Kerth, Augusto Marques
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Publication number: 20070060069Abstract: A wireless communication device is disclosed wherein isolation buffers couple to respective active circuits or stages of the device to convey test information regarding such active circuits to a test data line from which status information may be collected. The communication device operates in two modes, namely a normal operational mode wherein the isolation buffers effectively short spurious emissions from the active circuits to a ground, and a test mode wherein the isolation buffers may convey test information from a selected active circuit to the test data line. The isolation buffers prevent spurious emissions from escaping the active circuits to which they are coupled and prevent spurious emissions from traveling from active circuit to active circuit over the test data line throughout the wireless device.Type: ApplicationFiled: January 27, 2006Publication date: March 15, 2007Applicant: Silicon Laboratories Inc.Inventors: Donald Kerth, James Maligeorgos, Xiaochuan Guo, Augusto Marques
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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
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Publication number: 20070019760Abstract: A mobile communications system comprising a phase-locked loop (PLL), radio frequency (RF) circuitry, and control circuitry configured to activate the PLL and the RF circuitry during a plurality of substantially mutually exclusive time intervals is provided.Type: ApplicationFiled: July 21, 2005Publication date: January 25, 2007Inventors: James Maligeorgos, G. Vishakhadatta
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Publication number: 20060160512Abstract: 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: ApplicationFiled: December 23, 2005Publication date: July 20, 2006Inventors: Lysander Lim, James Maligeorgos
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Patent number: 7035607Abstract: 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: July 31, 2003Date of Patent: April 25, 2006Assignee: Silicon Laboratories Inc.Inventors: Lysander Lim, James Maligeorgos
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Publication number: 20060068744Abstract: A technique includes selectively coupling impedances to an oscillator to establish a first frequency of operation of the oscillator. The technique includes repeating the selective coupling in a feedback loop to cause the first frequency to be near a second frequency.Type: ApplicationFiled: April 22, 2005Publication date: March 30, 2006Inventors: James Maligeorgos, Dylan Hester, Augusto Marques, G. Tuttle
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Publication number: 20060068736Abstract: 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: ApplicationFiled: April 22, 2005Publication date: March 30, 2006Inventors: Donald Kerth, James Maligeorgos, Dylan Hester, Lysander Lim, Augusto Marques, G. Tuttle
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Publication number: 20040166815Abstract: 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: July 31, 2003Publication date: August 26, 2004Inventors: James Maligeorgos, Augusto M. Marques, Lysander Lim, G. Tyson Tuttle, Aslamali A. Rafi, Tod Paulus, Gregory T. Uehara, Jeffery W. Scott, Richard T. Behrens, Donald A. Kerth, G. Diwakar Vishakhadatta, Vishnu S. Srinivasan, Caiyi Wang
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Publication number: 20040077327Abstract: 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: ApplicationFiled: July 31, 2003Publication date: April 22, 2004Inventors: Lysander Lim, James Maligeorgos