H03F 1/0205
In transistor amplifiers
Official title: {in transistor amplifiers}
H03F1/0205 (In transistor amplifiers) appears on 7,469 US grants and 7,784 published applications in this corpus.
Search patents in H03F- Granted patents
- 7,469
- Published applications
- 7,784
- Assignees
- 1,372
- Inventors
- 8,864
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 10 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 13 | 0 |
| 1983 | 5 | 0 |
| 1984 | 25 | 0 |
| 1985 | 14 | 0 |
| 1986 | 15 | 0 |
| 1987 | 10 | 0 |
| 1988 | 9 | 0 |
| 1989 | 10 | 0 |
| 1990 | 16 | 0 |
| 1991 | 27 | 0 |
| 1992 | 27 | 0 |
| 1993 | 19 | 0 |
| 1994 | 23 | 0 |
| 1995 | 31 | 0 |
| 1996 | 30 | 0 |
| 1997 | 16 | 0 |
| 1998 | 38 | 0 |
| 1999 | 47 | 0 |
| 2000 | 65 | 0 |
| 2001 | 66 | 20 |
| 2002 | 65 | 67 |
| 2003 | 82 | 89 |
| 2004 | 101 | 142 |
| 2005 | 95 | 162 |
| 2006 | 166 | 210 |
| 2007 | 145 | 213 |
| 2008 | 166 | 219 |
| 2009 | 183 | 202 |
| 2010 | 210 | 219 |
| 2011 | 226 | 232 |
| 2012 | 246 | 305 |
| 2013 | 305 | 319 |
| 2014 | 329 | 375 |
| 2015 | 369 | 451 |
| 2016 | 469 | 494 |
| 2017 | 548 | 403 |
| 2018 | 441 | 447 |
| 2019 | 492 | 444 |
| 2020 | 457 | 503 |
| 2021 | 378 | 403 |
| 2022 | 323 | 373 |
| 2023 | 276 | 417 |
| 2024 | 294 | 407 |
| 2025 | 328 | 364 |
| 2026 | 237 | 304 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 1/0211With control of the supply voltage or current3,609
- H03F 1/0261With control of the polarisation voltage or current1,901
- H03F 1/0288Using a main and one or several auxiliary peaking amplifiers whereby the1,108
- H03F 1/0277Selecting one or more amplifiers from a plurality of amplifiers1,057
- H03F 1/0294Using vector summing of two or more constant amplitude phase-modulated signals342
- H03F 1/0283Reducing the number of dc-current paths91
Recent patents
- Power amplifier6 Oct 2026US 12,756,362 B2Himax Technologies Limited
- Doherty amplifier system6 Oct 2026US 12,756,363 B2Qorvo US, Inc.
- Receiver circuit, corresponding system and method29 Sep 2026US 12,750,009 B2STMicroelectronics International N. V.
- Group III nitride Doherty amplifier using different epitaxial structures29 Sep 2026US 12,750,010 B2MACOM Technology Solutions Holdings, Inc.
- Amplifier with temperature dependent gain and temperature compensated bandwidth29 Sep 2026US 12,750,011 B2STMicroelectronics International N. V.
- Audio envelope tracking for controlling a tracking power supply8 Oct 2026US 2026/0312540 A1Harman Becker Automotive Systems GmbH
- High-frequency power supply device8 Oct 2026US 2026/0312541 A1Kyosan Electric Mfg. Co., Ltd.
- Multistage amplifier8 Oct 2026US 2026/0312542 A1NTT, Inc.
- Doherty power amplifiers with controllable capacitor for tuning harmonic termination and inverter8 Oct 2026US 2026/0312543 A1Skyworks Solutions, Inc.
- Power amplifier systems with load control8 Oct 2026US 2026/0312548 A1Skyworks Solutions, Inc.
Most cited
By later US patents
- Electronic device having sound output module1,021US 7,046,082 B2Rohm Co., Ltd. · 2006
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- Method and apparatus for operating a radio-frequency power amplifier as a variable-class linear amplifier338US 6,043,707 AMotorola, Inc. · 2000
- Multi-mode amplifier system294US 7,043,213 B2Northrop Grumman Corporation · 2006
- Efficient parallel-stage power amplifier252US 5,872,481 AQUALCOMM Incorporated · 1999