H03H 11/10
Using negative impedance converters
Official title: using negative impedance converters (H03H11/08 takes precedence)
H03H11/10 (Using negative impedance converters) appears on 21 US grants and 14 published applications in this corpus.
Search patents in H03H- Granted patents
- 21
- Published applications
- 14
- Assignees
- 23
- Inventors
- 50
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 2 |
| 2018 | 1 | 2 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Negative capacitance tuning in an acoustic filter circuit25 Aug 2026US 12,719,446 B2Qorvo US, Inc.
- Wide-bandwidth resonant circuit29 Aug 2023US 11,742,818 B2Qorvo US, Inc.
- Negative-resistance circuit and active filter for millimetre wave frequencies17 May 2022US 11,336,263 B2University of Pretoria
- Optimal response reflectionless filters6 Aug 2019US 10,374,577 B2Associated Universities, Inc.
- Resonator circuit having greater degrees of freedom, filter with improved tunability, and duplexer with improved tunability12 Feb 2019US 10,205,430 B2SnapTrack, Inc.
- Negative capacitance tuning in an acoustic filter circuit20 Feb 2025US 2025/0062748 A1Qorvo US, Inc.
- Wide-bandwidth resonant circuit6 Oct 2022US 2022/0321083 A1Qorvo US, Inc.
- Amplifier circuit17 Feb 2022US 2022/0052671 A1Panasonic Intellectual Property Management Co., Ltd.
- A negative-resistance circuit and active filter for millimetre wave frequencies24 Jun 2021US 2021/0194461 A1University of Pretoria
- Optimal response reflectionless filters22 Mar 2018US 2018/0083601 A1Associated Universities, Inc.
Most cited
By later US patents
- System and method for linearizing a CMOS differential pair30US 6,985,035 B1Broadcom Corporation · 2006
- Monolithic HBT active tuneable band-pass filter26US 5,550,520 ATRW Inc. · 1996
- Integrated tunable RF notch filter20US 8,428,203 B1PMC-Sierra, Inc. · 2013
- Differential negative impedance converters and inverters with variable or tunable conversion ratios13US 8,988,173 B2HRL Laboratories, LLC · 2015
- Active filters utilizing networks of resistors and negative impedance converters11US 4,147,997 AThe Post Office · 1979