Patents by Inventor Steven R. Spielman
Steven R. Spielman 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: 9821263Abstract: This technology relates to the enlargement by water condensation in a laminar flow of airborne particles with diameters of the order of a few nanometers to hundreds of nanometers to form droplets with diameters of the order of several micrometers. The technology presents several advanced designs, including the use of double-stage condensers. It has application to measuring the number concentration of particles suspended in air or other gas, to collecting these particles, or to focusing these particles.Type: GrantFiled: June 27, 2014Date of Patent: November 21, 2017Assignee: AEROSOL DYNAMICS INC.Inventors: Susanne V. Hering, Gregory S. Lewis, Steven R. Spielman
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Publication number: 20150075372Abstract: This technology relates to the enlargement by water condensation in a laminar flow of airborne particles with diameters of the order of a few nanometers to hundreds of nanometers to form droplets with diameters of the order of several micrometers. The technology presents several advanced designs, including the use of double-stage condensers. It has application to measuring the number concentration of particles suspended in air or other gas, to collecting these particles, or to focusing these particles.Type: ApplicationFiled: June 27, 2014Publication date: March 19, 2015Inventors: Susanne V. Hering, Gregory S. Lewis, Steven R. Spielman
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Patent number: 8801838Abstract: This technology relates to the enlargement by water condensation in a laminar flow of airborne particles with diameters of the order of a few nanometers to hundreds of nanometers to form droplets with diameters of the order of several micrometers. The technology presents several advanced designs, including the use of double-stage condensers. It has application to measuring the number concentration of particles suspended in air or other gas, to collecting these particles, or to focusing these particles.Type: GrantFiled: August 25, 2011Date of Patent: August 12, 2014Assignee: Aerosol Dynamics Inc.Inventors: Susanne V. Hering, Gregory S. Lewis, Steven R. Spielman
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Patent number: 8459572Abstract: Technology is presented for the high efficiency concentration of fine and ultrafine airborne particles into a small fraction of the sampled airflow by condensational enlargement, aerodynamic focusing and flow separation. A nozzle concentrator structure including an acceleration nozzle with a flow extraction structure may be coupled to a containment vessel. The containment vessel may include a water condensation growth tube to facilitate the concentration of ultrafine particles. The containment vessel may further include a separate carrier flow introduced at the center of the sampled flow, upstream of the acceleration nozzle of the nozzle concentrator to facilitate the separation of particle and vapor constituents.Type: GrantFiled: October 22, 2010Date of Patent: June 11, 2013Assignee: Aerosol Dynamics Inc.Inventors: Susanne Hering, Gregory Lewis, Steven R. Spielman
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Patent number: 8151121Abstract: Securely storing data to an optical disc has been described, including generating write data that includes the data and overhead data that facilitates reading the data from the disc; and configuring the overhead data according to a key.Type: GrantFiled: March 11, 2003Date of Patent: April 3, 2012Assignee: LSI CorporationInventors: Terrence L. Wong, Ian E. Harvey, David C. Lee, Greg S. Lewis, Steven R. Spielman, Christopher C. Tan, David K. Warland
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Publication number: 20120048112Abstract: This technology relates to the enlargement by water condensation in a laminar flow of airborne particles with diameters of the order of a few nanometers to hundreds of nanometers to form droplets with diameters of the order of several micrometers. The technology presents several advanced designs, including the use of double-stage condensers. It has application to measuring the number concentration of particles suspended in air or other gas, to collecting these particles, or to focusing these particles.Type: ApplicationFiled: August 25, 2011Publication date: March 1, 2012Inventors: Susanne V. Hering, Gregory S. Lewis, Steven R. Spielman
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Patent number: 8045179Abstract: Line edge roughness or line width roughness of a feature on a sample may be determined from incident radiation scattered from the feature. An amount of ordered scattered radiation characterized by a discrete diffraction order is determined and a diffuse scattered radiation signal is measured. A ratio between an intensity of the ordered scattered incident radiation and an intensity of the diffuse scattered radiation signal is determined. The line edge roughness or line width roughness is determined from the ratio.Type: GrantFiled: November 20, 2008Date of Patent: October 25, 2011Assignee: KLA-Tencor CorporationInventors: Guorong Vera Zhuang, Steven R. Spielman, Leonid Poslavsky, Daniel C. Wack, John Fielden
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Publication number: 20110095095Abstract: Technology is presented for the high efficiency concentration of fine and ultrafine airborne particles into a small fraction of the sampled airflow by condensational enlargement, aerodynamic focusing and flow separation. A nozzle concentrator structure including an acceleration nozzle with a flow extraction structure may be coupled to a containment vessel. The containment vessel may include a water condensation growth tube to facilitate the concentration of ultrafine particles. The containment vessel may further include a separate carrier flow introduced at the center of the sampled flow, upstream of the acceleration nozzle of the nozzle concentrator to facilitate the separation of particle and vapor constituents.Type: ApplicationFiled: October 22, 2010Publication date: April 28, 2011Applicant: AEROSOL DYNAMICS INC.Inventors: Susanne V. Hering, Gregory S. Lewis, Steven R. Spielman
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Patent number: 7414942Abstract: A system and method are disclosed for providing a gain control signal for a multilevel read signal. In one embodiment, maximum automatic gain control marks are periodically inserted amongst a series of data fields. The automatic gain control marks include a series of high level marks such that the maximum signal detected in the interior portion of each maximum automatic gain control mark is not reduced by intersymbol interference. Minimum automatic gain control marks are also periodically inserted amongst a series of data fields. The automatic gain control marks include a series of high level marks such that the maximum signal detected in the interior portion of each minimum automatic gain control mark is not reduced by intersymbol interference. In another embodiment, multilevel signals are encoded to facilitate automatic gain control. The effect of a plurality of candidate merge symbols on the residual running total power associated with a current data block is determined.Type: GrantFiled: November 4, 2004Date of Patent: August 19, 2008Assignee: LSI CorporationInventors: Steven R. Spielman, Yung-Cheng Lo, David C. Lee, Judith C. Powelson
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Patent number: 7149178Abstract: A system and method for reading and writing in a multilevel optical data system is disclosed. The system provides control signals for timing acquisition, level calibration, DC control, AGC, equalizer training and data synchronization. The user data is ECC protected and optionally convolutionally encoded before being combined with the control signals in an information block. The multilevel information block can be written to an optical disc as a series of multilevel marks. The optical disc may also contain an Address in Pregroove signal (AIP) to facilitate synchronization during writing of an information block. The AIP signal has an integer number of address frames per information block.Type: GrantFiled: June 25, 2004Date of Patent: December 12, 2006Assignee: LSI Logic CorporationInventors: Terrence L. Wong, Gregory S. Lewis, David C. Lee, Yi Ling, Stephen P. Pope, Steven R. Spielman, Jonathan A. Zingman
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Patent number: 7145858Abstract: Creation and detection of synchronization marks for a multilevel data storage medium is disclosed. A sequence of symbols is generated and the sequence of symbols is written to the multilevel data storage medium. A corresponding sequence may be generated by a detector and correlated with read data to detect the synchronization mark.Type: GrantFiled: August 30, 2004Date of Patent: December 5, 2006Assignee: LSI Logic CorporationInventors: David C. Lee, Steven R. Spielman, Jonathan A. Zingman, Gregory S. Lewis
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Patent number: 7136333Abstract: A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.Type: GrantFiled: February 2, 2004Date of Patent: November 14, 2006Assignee: LSI Logic CorporationInventors: Terrence L. Wong, John L. Fan, David C. Lee, Yi Ling, Yung-Cheng Lo, Steven E. McLaughlin, Laura L. McPheters, Richard L. Martin, Judith C. Powelson, Steven R. Spielman, David K. Warland, Jonathan A. Zingman
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Patent number: 6982939Abstract: Methods and systems for write compensation for optimizing the performance of a data storage or communication channel are disclosed. In one embodiment, a method comprises determining channel sensitivity to modifications in write signal parameters, detecting systematic errors in a read signal recovered from data written with a first set of write parameters, and adjusting the write signal parameters by an amount determined from the channel sensitivity such that the systematic errors are reduced when data are written with the adjusted write parameters.Type: GrantFiled: November 8, 2001Date of Patent: January 3, 2006Assignee: LSI Logic CorporationInventors: Judith C. Powelson, David K. Warland, Ian E. Harvey, Yung-Cheng Lo, Christine Pepin, Steven R. Spielman, Ting Zhou, Jonathan A. Zingman
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Patent number: 6842410Abstract: A system and method are disclosed for providing a gain control signal for a multilevel read signal. In one embodiment, maximum automatic gain control marks are periodically inserted amongst a series of data fields. The automatic gain control marks include a series of high level marks such that the maximum signal detected in the interior portion of each maximum automatic gain control mark is not reduced by intersymbol interference. Minimum automatic gain control marks are also periodically inserted amongst a series of data fields. The automatic gain control marks include a series of high level marks such that the maximum signal detected in the interior portion of each minimum automatic gain control mark is not reduced by intersymbol interference. In another embodiment, multilevel signals are encoded to facilitate automatic gain control. The effect of a plurality of candidate merge symbols on the residual running total power associated with a current data block is determined.Type: GrantFiled: April 6, 2001Date of Patent: January 11, 2005Assignee: LSI Logic CorporationInventors: Steven R. Spielman, Yung-Cheng Lo, David C. Lee, Judith C. Powelson
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Publication number: 20040233815Abstract: A system and method for reading and writing in a multilevel optical data system is disclosed. The system provides control signals for timing acquisition, level calibration, DC control, AGC, equalizer training and data synchronization. The user data is ECC protected and optionally convolutionally encoded before being combined with the control signals in an information block. The multilevel information block can be written to an optical disc as a series of multilevel marks. The optical disc may also contain an Address in Pregroove signal (AIP) to facilitate synchronization during writing of an information block. The AIP signal has an integer number of address frames per information block.Type: ApplicationFiled: June 25, 2004Publication date: November 25, 2004Inventors: Terrence L. Wong, Gregory S. Lewis, David C. Lee, Yi Ling, Stephen P. Pope, Steven R. Spielman, Jonathan A. Zingman
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Patent number: 6816447Abstract: Creation and detection of synchronization marks for a multilevel data storage medium is disclosed. A sequence of symbols is generated and the sequence of symbols is written to the multilevel data storage medium. A corresponding sequence may be generated by a detector and correlated with read data to detect the synchronization mark.Type: GrantFiled: May 31, 2001Date of Patent: November 9, 2004Assignee: LSI Logic CorporationInventors: David C. Lee, Steven R. Spielman, Jonathan A. Zingman, Gregory S. Lewis
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Publication number: 20040156284Abstract: A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.Type: ApplicationFiled: February 2, 2004Publication date: August 12, 2004Inventors: Terrence L. Wong, John L. Fan, David C. Lee, Yi Ling, Yung-Cheng Lo, Steven E. McLaughlin, Laura L. McPheters, Richard L. Martin, Judith C. Powelson, Steven R. Spielman, David K. Warland, Jonathan A. Zingman
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Patent number: 6771570Abstract: A system and method for reading and writing in a multilevel optical data system is disclosed. The system provides control signals for timing acquisition, level calibration, DC control, AGC, equalizer training and data synchronization. The user data is ECC protected and optionally convolutionally encoded before being combined with the control signals in an information block. The multilevel information block can be written to an optical disc as a series of multilevel marks. The optical disc may also contain an Address in Pregroove signal (AIP) to facilitate synchronization during writing of an information block. The AIP signal has an integer number of address frames per information block.Type: GrantFiled: December 30, 1999Date of Patent: August 3, 2004Assignee: LSI Logic CorporationInventors: Terrence L. Wong, Gregory S. Lewis, David C. Lee, Yi Ling, Stephen P. Pope, Steven R. Spielman, Jonathan A. Zingman
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Patent number: 6657933Abstract: A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.Type: GrantFiled: July 19, 2001Date of Patent: December 2, 2003Assignee: Calimetrics, Inc.Inventors: Terrence L. Wong, John L. Fan, David C. Lee, Yi Ling, Yung-Cheng Lo, Steven W. McLaughlin, Laura L. McPheters, Richard L. Martin, Judith C. Powelson, Steven R. Spielman, David K. Warland, Jonathan A. Zingman
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Publication number: 20020126604Abstract: Methods and systems for write compensation for optimizing the performance of a data storage or communication channel are disclosed. In one embodiment, a method comprises determining channel sensitivity to modifications in write signal parameters, detecting systematic errors in a read signal recovered from data written with a first set of write parameters, and adjusting the write signal parameters by an amount determined from the channel sensitivity such that the systematic errors are reduced when data are written with the adjusted write parameters.Type: ApplicationFiled: November 8, 2001Publication date: September 12, 2002Inventors: Judith C. Powelson, David K. Warland, Ian E. Harvey, Yung-Cheng Lo, Christine Pepin, Steven R. Spielman, Ting Zhou, Jonathan A. Zingman