H03H 11/0422
Using transconductance amplifiers
Official title: {using transconductance amplifiers, e.g. gmC filters}
H03H11/0422 (Using transconductance amplifiers) appears on 330 US grants and 211 published applications in this corpus.
Search patents in H03H- Granted patents
- 330
- Published applications
- 211
- Assignees
- 185
- Inventors
- 567
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 11 | 0 |
| 1996 | 10 | 0 |
| 1997 | 13 | 0 |
| 1998 | 8 | 0 |
| 1999 | 10 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 6 |
| 2002 | 18 | 8 |
| 2003 | 10 | 16 |
| 2004 | 12 | 14 |
| 2005 | 8 | 10 |
| 2006 | 12 | 11 |
| 2007 | 12 | 14 |
| 2008 | 6 | 6 |
| 2009 | 11 | 7 |
| 2010 | 10 | 6 |
| 2011 | 4 | 7 |
| 2012 | 1 | 7 |
| 2013 | 10 | 11 |
| 2014 | 11 | 9 |
| 2015 | 9 | 7 |
| 2016 | 12 | 14 |
| 2017 | 10 | 9 |
| 2018 | 7 | 9 |
| 2019 | 15 | 8 |
| 2020 | 16 | 3 |
| 2021 | 3 | 4 |
| 2022 | 5 | 8 |
| 2023 | 6 | 3 |
| 2024 | 4 | 8 |
| 2025 | 6 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03H 11/0472Current or voltage controlled filters109
- H03H 11/0433Two integrator loop filters68
- H03H 11/0444Simulation of ladder networks63
- H03H 11/0466Filters combining transconductance amplifiers with other active elements36
- H03H 11/0461Current mode filters19
- H03H 11/0427Filters using a single transconductance amplifier14
- H03H 11/0455Multiple integrator loop feedback filters12
Recent patents
- Bidirectional interface port11 Aug 2026US 12,706,629 B2Telefonaktiebolaget LM Ericsson (publ)
- Filter21 Oct 2025US 12,451,868 B2Novelda AS
- Low-pass filter circuit14 Oct 2025US 12,445,115 B2NXP B. V.
- Baseband filter for current-mode signal path7 Oct 2025US 12,438,525 B2International Business Machines Corporation
- Calibration method and tuning method for on-chip differential active RC filter5 Aug 2025US 12,381,538 B2South China University of Technology
- Rf differential circuit with common mode noise rejection9 Jul 2026US 2026/0196985 A1
- Bandpass filter18 Jun 2026US 2026/0172004 A1Mitsubishi Electric Corporation
- Feedforward Notch Filter Circuitry8 Jan 2026US 2026/0012158 A1Apple Inc.
- High- and low-pass network circuit with integrated amplitude-phase regulation and control method thereof30 Oct 2025US 2025/0337392 A138th Research Institute, China Electronics Technology Group Corporation
- Current-reuse current-mode notch filter4 Sep 2025US 2025/0279766 A1Sequans Communications
Most cited
By later US patents
- Active filter104US 5,124,592 AKabushiki Kaisha Toshiba · 1992
- Method for time constant tuning of gm-C filters104US 6,084,465 ATritech Microelectronics, Ltd. · 2000
- Multimode receiver86US 7,266,361 B2Toumaz Technology Limited · 2007
- Universal active filter83US 5,317,217 ADeutsche Thomson-Brandt GmbH · 1994
- Low-voltage transconductance amplifier/filters65US 6,704,560 B1Skyworks Solutions, Inc. · 2004