H04B 3/145
Variable equalisers
Official title: {variable equalisers}
H04B3/145 (Variable equalisers) appears on 139 US grants and 70 published applications in this corpus.
Search patents in H04B- Granted patents
- 139
- Published applications
- 70
- Assignees
- 83
- Inventors
- 223
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 2 | 2 |
| 2003 | 6 | 5 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 3 | 5 |
| 2007 | 1 | 3 |
| 2008 | 2 | 1 |
| 2009 | 5 | 2 |
| 2010 | 3 | 8 |
| 2011 | 2 | 3 |
| 2012 | 7 | 4 |
| 2013 | 6 | 2 |
| 2014 | 2 | 3 |
| 2015 | 3 | 3 |
| 2016 | 2 | 1 |
| 2017 | 7 | 9 |
| 2018 | 5 | 2 |
| 2019 | 4 | 3 |
| 2020 | 3 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 3 |
| 2023 | 2 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Equalizer with all-pass filter delay22 Sep 2026US 12,744,695 B2Cisco Technology, Inc.
- Receiver equalization circuitry using variable termination and T-coil12 Aug 2025US 12,388,490 B2Advanced Micro Devices, Inc.
- Methods and circuits for adaptive equalization30 May 2023US 11,665,028 B2Rambus Inc.
- Adaptive cable equalizer28 Mar 2023US 11,616,529 B2MACOM Technology Solutions Holdings, Inc.
- Self-describing system using single-source/multi-destination cable22 Nov 2022US 11,509,751 B2Dell Products L. P.
- Equalizer with all-pass filter delay9 Jul 2026US 2026/0197212 A1Cisco Technology, Inc.
- Receiver equalization circuitry using variable termination and t-coil28 Sep 2023US 2023/0308132 A1Advanced Micro Devices, Inc.
- Adaptive cable equalizer18 Aug 2022US 2022/0263540 A1MACOM Technology Solutions Holdings, Inc.
- Self-describing system using single-source/multi-destination cable23 Jun 2022US 2022/0201104 A1Dell Products L. P.
- Methods and Circuits for Adaptive Equalization10 Mar 2022US 2022/0078052 A1Rambus Inc.
Most cited
By later US patents
- Analog receive equalizer for digital-subscriber-line communications system165US 6,226,322 B1Texas Instruments Incorporated · 2001
- Adaptive cable equalizer55US 5,978,417 ANational Semiconductor Corporation · 1999
- Variable equalizer49US 4,187,479 AHitachi, Ltd. · 1980
- Adaptive receive-side equalization46US 7,639,736 B2Rambus Inc. · 2009
- Multiple stage adaptive equalizer45US 5,841,810 ANational Semiconductor Corporation · 1998