H03H 11/1291
Current or voltage controlled filters
Official title: {Current or voltage controlled filters}
H03H11/1291 (Current or voltage controlled filters) appears on 534 US grants and 413 published applications in this corpus.
Search patents in H03H- Granted patents
- 534
- Published applications
- 413
- Assignees
- 239
- Inventors
- 802
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 7 | 0 |
| 2000 | 11 | 0 |
| 2001 | 5 | 5 |
| 2002 | 15 | 8 |
| 2003 | 20 | 17 |
| 2004 | 15 | 28 |
| 2005 | 30 | 42 |
| 2006 | 36 | 28 |
| 2007 | 23 | 28 |
| 2008 | 30 | 39 |
| 2009 | 29 | 33 |
| 2010 | 34 | 31 |
| 2011 | 36 | 23 |
| 2012 | 19 | 15 |
| 2013 | 29 | 19 |
| 2014 | 24 | 13 |
| 2015 | 15 | 10 |
| 2016 | 15 | 9 |
| 2017 | 12 | 7 |
| 2018 | 6 | 7 |
| 2019 | 6 | 16 |
| 2020 | 9 | 5 |
| 2021 | 14 | 9 |
| 2022 | 8 | 8 |
| 2023 | 1 | 4 |
| 2024 | 9 | 3 |
| 2025 | 8 | 6 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Phase noise reduction in a variable analogue RF resonator with switched capacitors17 Mar 2026US 12,580,544 B2Anlotek Limited
- Canonical lowpass filter with digitally programmable cutoff frequency settings using current followers16 Dec 2025US 12,500,575 B2King Fahd University of Petroleum and Minerals
- Audio amplifying circuit and playing device21 Oct 2025US 12,451,849 B2Rda Microelectronics (Shanghai) Co., Ltd.
- Apparatus for providing parallel filtering2 Sep 2025US 12,407,332 B2Lear Corporation
- Noise filter circuit with controllable transistor off-resistance and associated noise filtering method12 Aug 2025US 12,388,420 B2Mediatek Inc.
- Reconfigurable multi-feedback filter for mmw receivers18 Dec 2025US 2025/0385697 A1QUALCOMM Incorporated
- Canonical lowpass filter with digitally programmable cutoff frequency settings using current followers4 Sep 2025US 2025/0279767 A1King Fahd University of Petroleum and Minerals
- Apparatus for providing parallel filtering19 Jun 2025US 2025/0202457 A1Lear Corporation
- Phase characteristic measurement device, signal generator and signal analyzer having same, and phase characteristic measurement method12 Jun 2025US 2025/0192812 A1Anritsu Corporation
- Detection device3 Apr 2025US 2025/0110251 A1Japan Display Inc.
Most cited
By later US patents
- Tunable filter and method of tuning a filter328US 6,778,023 B2Nokia Corporation · 2004
- Adaptive radio transceiver with low noise amplification211US 6,417,737 B1Broadcom Corporation · 2002
- Tunable filter with bypass134US 6,618,579 B1The Chase Manhattan Bank · 2003
- Method and apparatus for tuning a continuous time filter127US 5,914,633 ALucent Technologies Inc. · 1999
- System and method for providing a low power receiver design114US 6,377,315 B1Broadcom Corporation · 2002