H03H 11/405
Positive impedance converters
Official title: {Positive impedance converters (H03H11/42 takes precedence; used in frequency selective networks H03H11/0416)}
H03H11/405 (Positive impedance converters) appears on 38 US grants and 17 published applications in this corpus.
Search patents in H03H- Granted patents
- 38
- Published applications
- 17
- Assignees
- 29
- Inventors
- 48
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
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| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 2 | 2 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 2 | 4 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Capacitance multiplier for decoupling capacitor31 Mar 2026US 12,592,681 B2Apple Inc.
- Method for implementing simulator and impedance multiplier circuit21 Jan 2025US 12,206,379 B2King Fahd University of Petroleum and Minerals
- System for configuring active inductor simulator and multiplier circuit21 Jan 2025US 12,206,380 B2King Fahd University of Petroleum and Minerals
- Active inductive simulator and impedance multiplier31 Dec 2024US 12,184,256 B2King Fahd University of Petroleum and Minerals
- Tunable grounded positive and negative active inductor simulator and impedance multiplier22 Oct 2024US 12,126,315 B2King Fahd University of Petroleum and Minerals
- Active inductive simulator and impedance multiplier5 Dec 2024US 2024/0405752 A1King Fahd University of Petroleum and Minerals
- Method for implementing simulator and impedance multiplier circuit5 Dec 2024US 2024/0405753 A1King Fahd University of Petroleum and Minerals
- System for configuring active inductor simulator and multiplier circuit5 Dec 2024US 2024/0405754 A1King Fahd University of Petroleum and Minerals
- Tunable grounded positive and negative active inductor simulator and impedance multiplier4 Apr 2024US 2024/0113697 A1King Fahd University of Petroleum and Minerals
- Capacitance Multiplier for Decoupling Capacitor28 Dec 2023US 2023/0421136 A1Apple Inc.
Most cited
By later US patents
- Programmable impedance control circuit61US 6,525,558 B2Samsung Electronics Co., Ltd. · 2003
- Programmable impedance control circuit47US 6,661,250 B2Samsung Electronics Co., Ltd. · 2003
- Apparatus and method for capacitance multiplication29US 6,344,772 B12002
- Unbalanced-to-balanced signal converter circuit21US 4,109,214 AMotorola, Inc. · 1978
- Temperature drift stabilized filter circuit18US 5,659,264 ANippondenso Co., Ltd. · 1997