Annampedu; Viswanath

Patent Applications and Registrations

Patent applications and USPTO patent grants for Annampedu; Viswanath.The latest application filed is for "clock data recovery convergence in modulated partial response systems".

Company Profile

0.59.50

Annampedu; Viswanath - Plano TX
Annampedu; Viswanath - Schnecksville PA
Annampedu; Viswanath - Bethlehem PA
Annampedu; Viswanath - Allentown PA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Clock Data Recovery Convergence In Modulated Partial Response Systems App 20220311592 - Aziz; Pervez Mirza ; et al.	2022-09-29
Clock data recovery convergence using signed timing injection Grant 11,212,073 - Aziz , et al. December 28, 2	2021-12-28
Clock Data Recovery Convergence Using Signed Timing Injection App 20200336286 - Aziz; Pervez Mirza ; et al.	2020-10-22
Clock data recovery convergence using signed timing injection Grant 10,700,846 - Aziz , et al.	2020-06-30
Dual Threshold Automatic Gain Control System And Method App 20160218734 - Malipatil; Amaresh V. ; et al.	2016-07-28
Timing phase estimation for clock and data recovery Grant 9,385,858 - Malipatil , et al. July 5, 2	2016-07-05
Systems and methods for memory efficient repeatable run out processing Grant 9,305,581 - Annampedu , et al. April 5, 2	2016-04-05
Systems and methods for fly-height control using servo data Grant 9,305,582 - Mathew , et al. April 5, 2	2016-04-05
Receiver with pipelined tap coefficients and shift control Grant 9,294,313 - Prokop , et al. March 22, 2	2016-03-22
Selecting Floating Tap Positions In A Floating Tap Equalizer App 20150349988 - Annampedu; Viswanath ; et al.	2015-12-03
Clock and data recovery architecture with adaptive digital phase skew Grant 9,143,367 - Aziz , et al. September 22, 2	2015-09-22
Flaw scan circuit for repeatable run out (RRO) data Grant 9,093,096 - Annampedu July 28, 2	2015-07-28
Alignment of sampling phases in a multi-channel time-interleaved analog-to-digital converter Grant 9,083,366 - Annampedu , et al. July 14, 2	2015-07-14
Receiver With Pipelined Tap Coefficients And Shift Control App 20150195108 - Prokop; Tomasz ; et al.	2015-07-09
Clock And Data Recovery Architecture With Adaptive Digital Phase Skew App 20150016497 - Aziz; Pervez M. ; et al.	2015-01-15
System and method for determining channel loss in a dispersive communication channel at the Nyquist frequency Grant 8,902,959 - Annampedu , et al. December 2, 2	2014-12-02
Systems and methods for pattern detection Grant 8,874,410 - Zhang , et al. October 28, 2	2014-10-28
Methods and apparatus for improved detection of servo sector data using single bit error correction Grant 8,848,304 - Annampedu September 30, 2	2014-09-30
Adaptive Continuous Time Linear Equalizer App 20140269888 - Annampedu; Viswanath ; et al.	2014-09-18
Timing Phase Estimation for Clock and Data Recovery App 20140241478 - Malipatil; Amaresh V. ; et al.	2014-08-28
Adaptive continuous time linear equalizer Grant 8,817,867 - Annampedu , et al. August 26, 2	2014-08-26
System and Method for Determining Channel Loss in a Dispersive Communication Channel at the Nyquist Frequency App 20140204987 - Annampedu; Viswanath ; et al.	2014-07-24
Methods and apparatus for validating detection of RRO address marks Grant 8,699,160 - Annampedu , et al. April 15, 2	2014-04-15
Flaw Scan Circuit For Repeatable Run Out (rro) Data App 20140033000 - Annampedu; Viswanath	2014-01-30
Methods And Apparatus For Improved Detection Of Servo Sector Data Using Single Bit Error Correction App 20140029129 - Annampedu; Viswanath	2014-01-30
Systems and methods for sequence detection in data processing Grant 8,566,381 - Annampedu October 22, 2	2013-10-22
Systems and methods for signal polarity determination Grant 8,526,131 - Annampedu , et al. September 3, 2	2013-09-03
Systems and methods for spiral waveform detection Grant 8,498,072 - Annampedu , et al. July 30, 2	2013-07-30
Systems and methods for detecting a reference pattern Grant 8,456,775 - Grundvig , et al. June 4, 2	2013-06-04
Methods And Apparatus For Validating Detection Of Rro Address Marks App 20130107687 - Annampedu; Viswanath ; et al.	2013-05-02
Systems and methods for improved timing recovery Grant 8,411,385 - Annampedu April 2, 2	2013-04-02
Method and apparatus for improved address mark detection Grant 8,405,924 - Annampedu March 26, 2	2013-03-26
Systems and methods for reduced format data processing Grant 8,325,433 - Zhang , et al. December 4, 2	2012-12-04
Systems and Methods for Pattern Detection App 20120303327 - Zhang; Xun ; et al.	2012-11-29
Systems and methods for diversity combined data detection Grant 8,261,171 - Annampedu September 4, 2	2012-09-04
Systems and methods for improved synchronization between an asynchronously detected signal and a synchronous operation Grant 8,254,049 - Annampedu August 28, 2	2012-08-28
Systems and methods for sector address mark detection Grant 8,243,381 - Annampedu , et al. August 14, 2	2012-08-14
Systems And Methods For Diversity Combined Data Detection App 20120197920 - Annampedu; Viswanath	2012-08-02
Systems and Methods for Reduced Format Data Processing App 20120182643 - Zhang; Xun ; et al.	2012-07-19
Systems and Methods for Improved Timing Recovery App 20120155587 - Annampedu; Viswanath	2012-06-21
Methods and apparatus for gain estimation using servo data with improved bias correction Grant 8,199,422 - Annampedu , et al. June 12, 2	2012-06-12
Systems and Methods for Signal Polarity Determination App 20120134042 - Annampedu; Viswanath ; et al.	2012-05-31
Systems and Methods for Spiral Waveform Detection App 20120134043 - Annampedu; Viswanath ; et al.	2012-05-31
Systems and Methods for Sequence Detection in Data Processing App 20120036173 - Annampedu; Viswanath	2012-02-09
Methods And Apparatus For Gain Estimation Using Servo Data With Improved Bias Correction App 20120026620 - Annampedu; Viswanath ; et al.	2012-02-02
Methods and systems for estimating time corresponding to peak signal amplitude Grant 8,059,349 - Annampedu , et al. November 15, 2	2011-11-15
Systems and methods for improved timing recovery Grant 8,054,931 - Annampedu November 8, 2	2011-11-08
Systems and methods for fly-height control using servo address mark data Grant 8,054,573 - Mathew , et al. November 8, 2	2011-11-08
Methods and apparatus for measuring servo address mark distance in a read channel using selective fine phase estimate Grant 8,049,982 - Grundvig , et al. November 1, 2	2011-11-01
Systems and Methods for Detecting a Reference Pattern App 20110157737 - Grundvig; Jeffrey ; et al.	2011-06-30
Systems and Methods for Fly-Height Control Using Servo Data App 20110043938 - Mathew; George ; et al.	2011-02-24
Systems and methods for acquiring modified rate burst demodulation in servo systems Grant 7,813,065 - Annampedu , et al. October 12, 2	2010-10-12
Methods and Systems for Estimating Time Corresponding to Peak Signal Amplitude App 20100232046 - Annampedu; Viswanath ; et al.	2010-09-16
Systems and methods for reducing the effects of ADC mismatch Grant 7,768,437 - Annampedu , et al. August 3, 2	2010-08-03
Systems and Methods for Fly-Height Control Using Servo Address Mark Data App 20100177430 - Mathew; George ; et al.	2010-07-15
Systems and methods for estimating time corresponding to peak signal amplitude Grant 7,738,200 - Annampedu , et al. June 15, 2	2010-06-15
Systems and Methods for Memory Efficient Repeatable Run Out Processing App 20100142078 - Annampedu; Viswanath ; et al.	2010-06-10
Systems and Methods for Sector Address Mark Detection App 20100118690 - Annampedu; Viswanath ; et al.	2010-05-13
Systems and Methods for Reducing the Effects of ADC Mismatch App 20090267819 - Annampedu; Viswanath ; et al.	2009-10-29
Systems and Methods for Acquiring Modified Rate Burst Demodulation in Servo Systems App 20090268322 - Annampedu; Viswanath ; et al.	2009-10-29
Method and apparatus for improving threshold detection of servo data in the presence of signal asymmetry Grant 7,586,704 - Annampedu September 8, 2	2009-09-08
Channel optimization metrics Grant 7,583,458 - Annampedu , et al. September 1, 2	2009-09-01
Address mark detection Grant 7,502,187 - Annampedu , et al. March 10, 2	2009-03-10
Asynchronous servo RRO detection employing interpolation Grant 7,502,427 - Annampedu , et al. March 10, 2	2009-03-10
Systems and methods for improving disk drive synchronization Grant 7,499,238 - Annampedu March 3, 2	2009-03-03
Systems and Methods for Improved Synchronization Between an Asynchronously Detected Signal and a Synchronous Operation App 20090052075 - Annampedu; Viswanath	2009-02-26
Systems and Methods for Improved Timing Recovery App 20090052602 - Annampedu; Viswanath	2009-02-26
Systems and methods for accessing data from a variable polarity head assembly Grant 7,423,827 - Neville , et al. September 9, 2	2008-09-09
Systems and Methods for Improving Disk Drive Synchronization App 20080074778 - Annampedu; Viswanath	2008-03-27
Systems and methods for estimating time corresponding to peak signal amplitude App 20070253084 - Annampedu; Viswanath ; et al.	2007-11-01
Systems and methods for accessing data from a variable polarity head assembly App 20070247735 - Neville; Roy S. ; et al.	2007-10-25
Method and apparatus for improving threshold detection of servo data in the presence of signal asymmetry App 20070195444 - Annampedu; Viswanath	2007-08-23
Method and apparatus for maximum likelihood detection of data employing interpolation with compensation of signal asymmetry Grant 7,180,693 - Annampedu , et al. February 20, 2	2007-02-20
Synchronizing an asynchronously detected servo signal to synchronous servo demodulation Grant 7,167,328 - Annampedu , et al. January 23, 2	2007-01-23
Asynchronous servo RRO detection employing interpolation App 20060233286 - Annampedu; Viswanath ; et al.	2006-10-19
Asynchronous servo RRO detection employing interpolation Grant 7,092,462 - Annampedu , et al. August 15, 2	2006-08-15
Servo data detection in the presence or absence of radial incoherence using digital interpolators Grant 7,082,005 - Annampedu , et al. July 25, 2	2006-07-25
Auto-ranging attenuators for read channels Grant 7,072,130 - Annampedu July 4, 2	2006-07-04
Synchronizing an asynchronously detected servo signal to synchronous servo demodulation App 20060132955 - Annampedu; Viswanath ; et al.	2006-06-22
Detection of recorded data employing interpolation with gain compensation Grant 7,002,767 - Annampedu , et al. February 21, 2	2006-02-21
Address mark detection App 20060023603 - Annampedu; Viswanath ; et al.	2006-02-02
Channel optimization metrics App 20060023583 - Annampedu; Viswanath ; et al.	2006-02-02
Auto-ranging attenuators for read channels App 20060023328 - Annampedu; Viswanath	2006-02-02
Method and apparatus for improved address mark detection App 20050243455 - Annampedu, Viswanath	2005-11-03
Method and apparatus for maximum likelihood detection of data employing interpolation with compensation of signal asymmetry App 20050231844 - Annampedu, Viswanath ; et al.	2005-10-20
Maximum likelihood detection of asynchronous servo data employing interpolation Grant 6,912,099 - Annampedu , et al. June 28, 2	2005-06-28
Detection of recorded data employing interpolation with gain compensation App 20050068650 - Annampedu, Viswanath ; et al.	2005-03-31
Scheme to improve performance of timing recovery systems for read channels in a disk drive Grant 6,856,183 - Annampedu February 15, 2	2005-02-15
Maximum likelihood detection of asynchronous servo data employing interpolation App 20040228019 - Annampedu, Viswanath ; et al.	2004-11-18
Servo data detection in presence of radial incoherence using multiple data detectors Grant 6,813,108 - Annampedu , et al. November 2, 2	2004-11-02
Asynchronous servo RRO detection employing interpolation App 20040136477 - Annampedu, Viswanath ; et al.	2004-07-15
Servo data detection in presence of radial incoherence using multiple data detectors App 20030099052 - Annampedu, Viswanath ; et al.	2003-05-29
Servo data detection in the presence or absence of radial incoherence using digital interpolators App 20030095350 - Annampedu, Viswanath ; et al.	2003-05-22
Scheme to improve performance of timing recovery systems for read channels in a disk drive App 20030072099 - Annampedu, Viswanath	2003-04-17

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