Patents by Inventor Richard Rauschmayer
Richard Rauschmayer 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: 20150243311Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for reporting a synchronization indication and for applying a synchronization window. As an example, a system is discussed that includes: a head assembly including a first read head and a second read head; a down track distance calculation circuit operable to calculate a down track distance between the first read head and the second read head; and a synchronization mark detection circuit. The synchronization mark detection circuit is operable to: assert a synchronization mark window based at a location based at least in part on the down track distance; query a first data set derived from the first read head for a synchronization mark occurring within the synchronization mark window; and query a second data set derived from the second read head for the synchronization mark occurring within the synchronization mark window.Type: ApplicationFiled: March 18, 2014Publication date: August 27, 2015Applicant: LSI CorporationInventors: Jeffrey P. Grundvig, Richard Rauschmayer, Scott M. Dziak
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Publication number: 20150243310Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for determining a down track distance between two or more read heads on a read/write head assembly.Type: ApplicationFiled: March 18, 2014Publication date: August 27, 2015Applicant: LSI CorporationInventors: Jeffrey P. Grundvig, Richard Rauschmayer, Jin Lu
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Patent number: 9099132Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for determining a down track distance between two or more read heads on a read/write head assembly.Type: GrantFiled: March 18, 2014Date of Patent: August 4, 2015Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Jeffrey P. Grundvig, Richard Rauschmayer, Jin Lu
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Patent number: 9025265Abstract: A method and system for providing format savings in data sectors. The method includes receiving a signal outputted from an analog-to-digital conversion circuit. The method further includes shifting a signal phase of the signal based at least upon a corrected phase at an output of a phase loop and a phase measured when the signal was digitally sampled by the analog-to-digital conversion circuit. The method also includes adjusting a gain of the signal based at least upon a current gain loop correction and a gain correction made when the signal was digitally sampled by the analog-to-digital conversion circuit. Additionally, the method includes adjusting the signal based at least upon an output of a current offset correction and an offset correction made when the signal was digitally sampled by the analog-to-digital conversion circuit. The method also includes outputting an adjusted signal to a sync mark detector.Type: GrantFiled: March 31, 2014Date of Patent: May 5, 2015Assignee: LSI CorporationInventors: Scott M. Dziak, Richard Rauschmayer, Jason D. Byrne
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Patent number: 9001446Abstract: A system and method for power management in a hard disk drive (HDD) assembly incorporating two or more read sensors includes directing a read/write head to follow a track; depowering one or more read sensors and readpath circuits associated with the read sensors; reading an analog readback signal through the first read sensor; processing the signal through an analog front-end to generate an input signal; sampling the input signal through an analog to digital converter at a first frequency to generate a first sampling signal; sampling the input signal through a second analog to digital converter at a second frequency to generate a second sampling signal; and generating a digital output signal from either or both sampling signals at a third sampling frequency through a digital signal processor. The method may additionally comprise adjusting a sampling frequency when power level reaches a threshold.Type: GrantFiled: February 28, 2014Date of Patent: April 7, 2015Assignee: LSI CorporationInventors: Bruce A. Wilson, Richard Rauschmayer, Peter J. Windler, Jefferson E. Singleton, Shaohua Yang, Jeffrey P. Grundvig
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Patent number: 8970976Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for reducing inter-track interference in relation to processing data retrieved from a storage medium.Type: GrantFiled: October 24, 2013Date of Patent: March 3, 2015Assignee: LSI CorporationInventors: Eui Seok Hwang, Jongseung Park, Ivana Djurdjevic, Richard Rauschmayer
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Patent number: 8949701Abstract: Various embodiments of the present invention provide systems and methods for media defect detection. For example, a media defect detection systems is disclosed that includes a data input derived from a medium, a fast envelope calculation circuit that receives the data input and provides a fast decay envelope value based on the data input, a slow envelope calculation circuit that receives the data input and provides a slow decay envelope value based on the data input, and a media defect detection circuit. The media defect detection circuit receives the slow decay envelope value and the fast decay envelope value, calculates a ratio value of the fast decay envelope value to the slow decay envelope value, and asserts a defect output based at least in part on the comparison of the ratio value to a defect threshold value.Type: GrantFiled: February 8, 2012Date of Patent: February 3, 2015Assignee: Agere Systems Inc.Inventors: Yang Cao, Scott M. Dziak, Nayak Ratnakar Aravind, Richard Rauschmayer, Weijun Tan
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Publication number: 20150012800Abstract: A data processing system is disclosed including a data detector, a data decoder and an alignment detector. The data detector is operable to apply a data detection algorithm to generate detected values for a data sector. The data decoder is operable to apply a data decode algorithm to a decoder input derived from the detected values to yield decoded values. The alignment detector is operable to calculate an offset between multiple versions of the data sector by correlating the multiple versions.Type: ApplicationFiled: July 26, 2013Publication date: January 8, 2015Applicant: LSI CorporationInventors: Shaohua Yang, George Mathew, Jefferson E. Singleton, Jongseung Park, Richard Rauschmayer
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Publication number: 20140334278Abstract: The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly and a storage medium.Type: ApplicationFiled: May 15, 2013Publication date: November 13, 2014Applicant: LSI CorporationInventors: Xiufeng Song, Richard Rauschmayer
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Patent number: 8879186Abstract: A method for performing parallel flaw scans of a plurality of tracks of a storage device. The storage device includes at least one disk, at least two read sensors, at least two analog front ends, and at least two independent timing loops. Each disk includes at least one surface, wherein each surface includes a plurality of tracks. The method includes writing flaw patterns to tracks of one or more surfaces of one or more disks. The method also includes positioning a first read sensor to read a first track. The method further includes positioning a second read sensor to read a second track. The method additionally includes simultaneously reading signals from the first track and the second track. The method also includes simultaneously performing flaw scans on read back signals from the first track and the second track. The method further includes outputting flaw scan results.Type: GrantFiled: August 19, 2014Date of Patent: November 4, 2014Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Haitao Xia, William J. Ledden, Richard Rauschmayer, Ming Jin
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Patent number: 8873194Abstract: Touchdown detection in magnetic storage devices is provided to detect contact between a storage medium and a magnetic head having an embedded contact sensor. A sample stream is obtained, which includes samples of a sensor signal output from the embedded contact sensor. The sample stream is segmented into multiple segments. A modulation depth is determined for each of the segments. A combined modulation depth is determined by combining the modulation depths of the segments using a weighting function. The combined modulation depth is compared with a threshold. A determination is made as to whether the magnetic head makes contact with the storage medium based on a result of the comparing.Type: GrantFiled: April 1, 2014Date of Patent: October 28, 2014Assignee: LSI CorporationInventors: Xiufeng Song, Richard Rauschmayer
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Patent number: 8875005Abstract: Various embodiments of the present invention provide systems and methods for media defect detection. For example, a media defect detection systems is disclosed that includes a data input derived from a medium, a fast envelope calculation circuit that receives the data input and provides a fast decay envelope value based on the data input, a slow envelope calculation circuit that receives the data input and provides a slow decay envelope value based on the data input, and a media defect detection circuit. The media defect detection circuit receives the slow decay envelope value and the fast decay envelope value, calculates a ratio value of the fast decay envelope value to the slow decay envelope value, and asserts a defect output based at least in part on the comparison of the ratio value to a defect threshold value.Type: GrantFiled: February 8, 2012Date of Patent: October 28, 2014Assignee: AGERE Systems Inc.Inventors: Yang Cao, Scott M. Dziak, Nayak Ratnakar Aravind, Richard Rauschmayer, Weijun Tan
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Patent number: 8861109Abstract: A data processing circuit includes a long magnet identification circuit operable to identify long magnet bits in data to be processed, the long magnet bits comprising bits having a same value as a number of preceding and subsequent bits, an error calculation circuit operable to subtract an ideal version of the long magnet bits from the long magnet bits to yield an error signal, an adjacent track interference metric calculation circuit operable to calculate an adjacent track interference metric based on the error signal, and a comparator circuit operable to compare the adjacent track interference metric with a threshold value and to assert a refresh signal when the adjacent track interference metric is greater than the threshold value.Type: GrantFiled: August 9, 2013Date of Patent: October 14, 2014Assignee: LSI CorporationInventors: Eui Seok Hwang, Richard Rauschmayer, Shaohua Yang, Bruce Wilson
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Patent number: 8861122Abstract: A data processing system includes a cross-correlation calculator operable to calculate cross-correlations between an input signal and each of three different sync patterns associated with a target track and neighboring tracks, a detector operable to select a largest of the cross-correlations, a threshold comparator operable to compare the cross-correlations with a threshold to determine a direction of any position error of a read head, and a position error estimator operable to estimate a position error of the read head based at least in part on the cross-correlations.Type: GrantFiled: December 16, 2013Date of Patent: October 14, 2014Assignee: LSI CorporationInventors: Eui Seok Hwang, Richard Rauschmayer
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Patent number: 8861111Abstract: A servo system includes a first equalizer circuit operable to filter digital servo data samples derived from a first read head to yield first equalized data, a second equalizer circuit operable to filter digital servo data samples derived from a second read head to yield second equalized data, a first interpolator operable to interpolate the first equalized data to yield a number of first interpolated outputs at different phases, a second interpolator operable to interpolate the second equalized data to yield a number of second interpolated outputs at different phases, and a phase tracking and signal combining circuit operable to select and combine most closely aligned signals from the first interpolated outputs and the second interpolated outputs to yield a combined servo data signal.Type: GrantFiled: April 2, 2014Date of Patent: October 14, 2014Assignee: LSI CorporationInventors: Yu Liao, Jeffrey P. Grundvig, Richard Rauschmayer
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Patent number: 8837068Abstract: A servo system includes multiple interpolators operable to interpolate equalized data for multiple signal paths in a two dimensional magnetic recording system to yield interpolated signals at different phases, scaling circuits operable to scale the interpolated signals by adaptive scaling factors, a signal combining circuit operable to combine the scaled signals, a phase tracking circuit operable to select one of the phases of the combined signal, and an error gradient circuit operable to adapt the adaptive scaling factors.Type: GrantFiled: April 23, 2014Date of Patent: September 16, 2014Assignee: LSI CorporationInventors: Yu Liao, Jeffrey P. Grundvig, Jin Lu, Richard Rauschmayer
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Patent number: 8817402Abstract: An apparatus having a controller and a preamplifier is disclosed. The controller may be configured to generate information on a serial bus coupled to a preamplifier interface. The preamplifier may be configured to (i) generate a count value in response to a clock signal synchronized to a recording medium and (ii) generate a plurality of tag signals based on the information and the count value. The tag signals may gate a read operation and a write operation of the preamplifier.Type: GrantFiled: December 19, 2012Date of Patent: August 26, 2014Assignee: LSI CorporationInventors: Ross S. Wilson, Richard Rauschmayer
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Publication number: 20140168809Abstract: An apparatus having a controller and a preamplifier is disclosed. The controller may be configured to generate information on a serial bus coupled to a preamplifier interface. The preamplifier may be configured to (i) generate a count value in response to a clock signal synchronized to a recording medium and (ii) generate a plurality of tag signals based on the information and the count value. The tag signals may gate a read operation and a write operation of the preamplifier.Type: ApplicationFiled: December 19, 2012Publication date: June 19, 2014Applicant: LSI CORPORATIONInventors: Ross S. Wilson, Richard Rauschmayer
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Publication number: 20130205185Abstract: Various embodiments of the present invention provide systems and methods for media defect detection. For example, a media defect detection systems is disclosed that includes a data input derived from a medium, a fast envelope calculation circuit that receives the data input and provides a fast decay envelope value based on the data input, a slow envelope calculation circuit that receives the data input and provides a slow decay envelope value based on the data input, and a media defect detection circuit. The media defect detection circuit receives the slow decay envelope value and the fast decay envelope value, calculates a ratio value of the fast decay envelope value to the slow decay envelope value, and asserts a defect output based at least in part on the comparison of the ratio value to a defect threshold value.Type: ApplicationFiled: February 8, 2012Publication date: August 8, 2013Inventors: Yang Cao, Scott M. Dziak, Nayak Ratnakar Aravind, Richard Rauschmayer, Weijun Tan
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Patent number: 8468418Abstract: Various embodiments of the present invention provide systems and methods for variable iteration data processing.Type: GrantFiled: July 12, 2012Date of Patent: June 18, 2013Assignee: LSI CorporationInventors: Shaohua Yang, Hao Zhong, Weijun Tan, Richard Rauschmayer, Yuan Xing Lee