G11B 20/10064
Eepr4 or e2pr4, i.e. extended partial response class 4, polynomial *3
Official title: {EEPR4 or E2PR4, i.e. extended partial response class 4, polynomial (1-D)*(1+D)3}
G11B20/10064 (Eepr4 or e2pr4, i.e. extended partial response class 4, polynomial *3) appears on 21 US grants and 8 published applications in this corpus.
Search patents in G11B- Granted patents
- 21
- Published applications
- 8
- Assignees
- 6
- Inventors
- 25
- Latest grant
- 5 Dec 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 3 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Identifying a defect in a data-storage medium5 Dec 2017US 9,837,119 B2STMicroelectronics S.r. l.
- Identifying a defect in a data-storage medium26 Apr 2016US 9,324,370 B2STMicroelectronics S.r. l.
- Rendering data write errors detectable31 Mar 2015US 8,996,967 B2STMicroelectronics S.r. l.
- Detecting data-write errors3 Jun 2014US 8,745,466 B2STMicroelectronics S.r. l.
- Disk drive adapting equalizer relative to bit error rate of sequence detector17 May 2011US 7,944,639 B1Western Digital Technologies, Inc.
- Identifying a defect in a data-storage medium17 Mar 2016US 2016/0077941 A1STMicroelectronics S.r. l.
- Identifying a defect in a data-storage medium23 Feb 2012US 2012/0047396 A1STMicroelectronics S.r. l.
- Detecting data-write errors9 Feb 2012US 2012/0036395 A1STMicroelectronics S.r. l.
- Rendering data write errors detectable9 Feb 2012US 2012/0036414 A1STMicroelectronics S.r. l.
- E2PR4 viterbi detector and method for adding a branch metric to the path metric of the surviving path after selecting the surviving path30 Oct 2008US 2008/0270874 A1STMicroelectronics S.r.l.
Most cited
By later US patents
- Equalization for sample value estimation and sequence detection in a sampled amplitude read channel185US 5,585,975 ACirrus Logic, Inc. · 1996
- Disk drive adapting equalizer relative to bit error rate of sequence detector132US 7,944,639 B1Western Digital Technologies, Inc. · 2011
- Magnetic disk sampled amplitude read channel employing interpolated timing recovery for synchronous detection of embedded servo data65US 5,726,818 ACirrus Logic, Inc. · 1998
- Parity channel code for enhancing the operation of a remod/demod sequence detector in a d=1 sampled amplitude read channel55US 6,052,248 ACirrus Logic, Inc. · 2000
- PR4 equalization and an EPR4 remod/demod sequence detector in a sampled amplitude read channel54US 5,961,658 ACirrus Logic, Inc. · 1999