H03F 1/523
For amplifiers using field-effect devices
Official title: {for amplifiers using field-effect devices (H03F1/526 takes precedence)}
H03F1/523 (For amplifiers using field-effect devices) appears on 552 US grants and 531 published applications in this corpus.
Search patents in H03F- Granted patents
- 552
- Published applications
- 531
- Assignees
- 257
- Inventors
- 1,075
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 13 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 3 |
| 2002 | 8 | 9 |
| 2003 | 6 | 12 |
| 2004 | 8 | 14 |
| 2005 | 13 | 14 |
| 2006 | 12 | 10 |
| 2007 | 12 | 16 |
| 2008 | 14 | 21 |
| 2009 | 17 | 19 |
| 2010 | 24 | 15 |
| 2011 | 12 | 12 |
| 2012 | 19 | 16 |
| 2013 | 15 | 20 |
| 2014 | 23 | 19 |
| 2015 | 21 | 21 |
| 2016 | 23 | 24 |
| 2017 | 22 | 18 |
| 2018 | 21 | 29 |
| 2019 | 31 | 29 |
| 2020 | 29 | 30 |
| 2021 | 27 | 34 |
| 2022 | 25 | 30 |
| 2023 | 23 | 37 |
| 2024 | 22 | 26 |
| 2025 | 21 | 33 |
| 2026 | 17 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- RF amplifier circuit with a feedback circuit and method for adjusting a gain mode of same circuit8 Sep 2026US 12,732,137 B2Infineon Technologies AG
- Circuits, devices and methods related to protection of radio-frequency amplifiers28 Jul 2026US 12,695,431 B2Skyworks Solutions, Inc.
- Power amplifier circuit21 Jul 2026US 12,689,334 B2Murata Manufacturing Co., Ltd.
- Reduction of artefacts in multi-channel systems30 Jun 2026US 12,671,369 B2Cirrus Logic, Inc.
- Protection circuit for power amplifiers23 Jun 2026US 12,665,552 B2pSemi Corporation
- System and method for adaptive power amplifier protection1 Oct 2026US 2026/0303037 A1QUALCOMM Incorporated
- Bidirectional conduction chip, circuit system, and electronic device27 Aug 2026US 2026/0254269 A1Shanghai Yaohuo Microelectronics Co., Ltd.
- Over temperature protection with soft shutdown for power amplifier23 Jul 2026US 2026/0213713 A1pSemi Corporation
- Over temperature protection of ldo controlling the rf power amplifier collector voltage16 Jul 2026US 2026/0205064 A1Skyworks Solutions, Inc.
- Output drivers for audio amplifiers2 Jul 2026US 2026/0189200 A1Skyworks Solutions, Inc.
Most cited
By later US patents
- Monolithic class D amplifier170US 5,973,368 A1999
- CMOS output buffer with slew rate control125US 5,877,647 ATexas Instruments Incorporated · 1999
- Protective circuit and device for metal-oxide-semiconductor field effect transistor and method for fabricating the device108US 4,086,642 AHitachi, Ltd. · 1978
- BiCMOS devices97US 5,856,695 AHarris Corporation · 1999
- Stacked RF power amplifier84US 7,053,718 B2Silicon Laboratories Inc. · 2006