H03F 3/2176
Class e amplifiers
Official title: {Class E amplifiers}
H03F3/2176 (Class e amplifiers) appears on 280 US grants and 283 published applications in this corpus.
Search patents in H03F- Granted patents
- 280
- Published applications
- 283
- Assignees
- 162
- Inventors
- 515
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 6 | 4 |
| 2003 | 3 | 4 |
| 2004 | 8 | 8 |
| 2005 | 6 | 10 |
| 2006 | 3 | 7 |
| 2007 | 8 | 11 |
| 2008 | 5 | 9 |
| 2009 | 6 | 4 |
| 2010 | 8 | 12 |
| 2011 | 11 | 10 |
| 2012 | 11 | 13 |
| 2013 | 8 | 9 |
| 2014 | 17 | 22 |
| 2015 | 21 | 10 |
| 2016 | 19 | 16 |
| 2017 | 11 | 13 |
| 2018 | 15 | 18 |
| 2019 | 20 | 20 |
| 2020 | 13 | 19 |
| 2021 | 14 | 19 |
| 2022 | 9 | 11 |
| 2023 | 20 | 10 |
| 2024 | 12 | 13 |
| 2025 | 4 | 7 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Isolated switching amplifier system8 Sep 2026US 12,732,141 B2Yank Technologies, Inc.
- Scalable periphery tunable matching power amplifier25 Aug 2026US 12,719,415 B2pSemi Corporation
- Bidirectional wireless data and power transfer over inductive link19 May 2026US 12,633,775 B2Nia Therapeutics, Inc.
- Bidirectional power transfer system, method of operating the same, and wireless power system12 May 2026US 12,627,169 B2Solace Power Inc.
- Generation and synchronization of pulse-width modulated (PWM) waveforms for radio-frequency (RF) applications12 May 2026US 12,627,262 B2Massachusetts Institute of Technology
- Phase Shifting Element For A Pulse Width Modulator (PWM) Generator6 Aug 2026US 2026/0230039 A1Massachusetts Institute of Technology
- Wideband class-e amplifier18 Jun 2026US 2026/0171985 A1
- Wide-range switched-mode power amplifier architecture23 Apr 2026US 2026/0113005 A1Massachusetts Institute of Technology
- Hetero-junction bipolar transistor amplifier control circuit29 Jan 2026US 2026/0031774 A1MACOM Technology Solutions Holdings, Inc.
- Bidirectional wireless data and power transfer over inductive link18 Sep 2025US 2025/0293545 A1Nia Therapeutics, Inc.
Most cited
By later US patents
- Integrated tunable high efficiency power amplifier216US 6,232,841 B1Rockwell Science Center, Inc. · 2001
- R. F. power amplifier177US 4,743,858 AU. S. Philips Corporation · 1988
- Switch mode power amplifier using MIS-HEMT with field plate extension158US 7,548,112 B2Cree, Inc. · 2009
- Class E Doherty amplifier topology for high efficiency signal transmitters150US 6,396,341 B1Ericsson Inc. · 2002
- Triple class E Doherty amplifier topology for high efficiency signal transmitters140US 6,472,934 B1Ericsson Inc. · 2002