G11B 20/10027
Adjusting the signal strength during recording or reproduction
Official title: {adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers (optimum power control for optical discs G11B7/125)}
G11B20/10027 (Adjusting the signal strength during recording or reproduction) appears on 283 US grants and 234 published applications in this corpus.
Search patents in G11B- Granted patents
- 283
- Published applications
- 234
- Assignees
- 82
- Inventors
- 532
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 3 |
| 2003 | 6 | 3 |
| 2004 | 8 | 12 |
| 2005 | 7 | 16 |
| 2006 | 3 | 13 |
| 2007 | 8 | 24 |
| 2008 | 11 | 24 |
| 2009 | 13 | 30 |
| 2010 | 24 | 22 |
| 2011 | 29 | 18 |
| 2012 | 31 | 13 |
| 2013 | 26 | 5 |
| 2014 | 16 | 9 |
| 2015 | 15 | 8 |
| 2016 | 10 | 3 |
| 2017 | 14 | 10 |
| 2018 | 11 | 3 |
| 2019 | 6 | 1 |
| 2020 | 2 | 3 |
| 2021 | 7 | 6 |
| 2022 | 5 | 4 |
| 2023 | 4 | 2 |
| 2024 | 3 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Data storage device comprising dual channel preamp circuit21 Apr 2026US RE50,873 E1Western Digital Technologies, Inc.
- Switchable inductor for boost or matching optimization18 Nov 2025US 12,475,926 B1Avago Technologies International Sales Pte. Limited
- Data storage device pre-biasing write current for energy assisted magnetic recording21 May 2024US 11,990,161 B2Western Digital Technologies, Inc.
- Two-stage audio gain circuit based on analog-to-digital conversion and audio terminal30 Apr 2024US 11,973,479 B2Radiawave Technologies Co., Ltd.
- Disk device13 Feb 2024US 11,900,964 B2Kabushiki Kaisha Toshiba
- Hybrid Analog Digital Audio Format1 Oct 2026US 2026/0301769 A1Ceramic Data Solutions GmbH
- Data storage device comprising dual channel preamp circuit16 Jul 2026US 2026/0204287 A1Western Digital Technologies, Inc.
- Data storage device pre-biasing write current for energy assisted magnetic recording21 Sep 2023US 2023/0298621 A1Western Digital Technologies, Inc.
- Disk device15 Jun 2023US 2023/0186951 A1Kabushiki Kaisha Toshiba
- Management of actuator dynamics in a multiple actuator hard disk drive with an unequal number of heads on the two outer arms of each actuator22 Dec 2022US 2022/0406333 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Disk drive comprising asynchronous/synchronous gain control for fault tolerant detection of servo sync mark after head switch144US 6,882,486 B1Western Digital Technologies, Inc. · 2005
- Acquistion timing loop for read channel140US 6,594,098 B1Marvell International Ltd. · 2003
- Disk drive employing a preamp comprising read/write pass throughs for cascading integrated circuits137US 8,390,948 B2Western Digital Technologies, Inc. · 2013
- Disk drive establishing write current limits prior to optimizing the write current for a plurality of tracks136US 7,933,090 B1Western Digital Technologies, Inc. · 2011
- Acquisition timing loop for read channel122US 6,801,380 B1Marvell International Ltd. · 2004