H03F 3/211
Using a combination of several amplifiers
Official title: {using a combination of several amplifiers (H03F3/60 takes precedence)}
H03F3/211 (Using a combination of several amplifiers) appears on 2,870 US grants and 3,073 published applications in this corpus.
Search patents in H03F- Granted patents
- 2,870
- Published applications
- 3,073
- Assignees
- 769
- Inventors
- 4,189
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 9 | 0 |
| 2000 | 20 | 0 |
| 2001 | 17 | 7 |
| 2002 | 15 | 21 |
| 2003 | 20 | 28 |
| 2004 | 44 | 45 |
| 2005 | 27 | 63 |
| 2006 | 59 | 67 |
| 2007 | 60 | 91 |
| 2008 | 60 | 82 |
| 2009 | 64 | 66 |
| 2010 | 75 | 89 |
| 2011 | 96 | 104 |
| 2012 | 105 | 119 |
| 2013 | 113 | 130 |
| 2014 | 144 | 174 |
| 2015 | 165 | 202 |
| 2016 | 198 | 236 |
| 2017 | 231 | 174 |
| 2018 | 179 | 157 |
| 2019 | 178 | 171 |
| 2020 | 172 | 192 |
| 2021 | 156 | 178 |
| 2022 | 135 | 153 |
| 2023 | 100 | 169 |
| 2024 | 128 | 161 |
| 2025 | 128 | 116 |
| 2026 | 92 | 78 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Doherty amplifier system6 Oct 2026US 12,756,363 B2Qorvo US, Inc.
- Tunable effective inductance for multi-gain LNA with inductive source degeneration29 Sep 2026US 12,750,026 B2pSemi Corporation
- Bias circuit and power amplifier circuit15 Sep 2026US 12,738,897 B2Murata Manufacturing Co., Ltd.
- Radio frequency circuit and communication device15 Sep 2026US 12,738,902 B2Murata Manufacturing Co., Ltd.
- Current equalization circuitry for the folded branch of a rail-to-rail input ota with ab-class output stage15 Sep 2026US 12,738,909 B2STMicroelectronics International N. V.
- Wideband doherty power amplifier1 Oct 2026US 2026/0303026 A1Indian Institute of Technology Roorkee
- Multi-paths amplifier circuit1 Oct 2026US 2026/0303042 A1STMicroelectronics International N. V.
- Multichannel drivers1 Oct 2026US 2026/0303078 A1Cirrus Logic International Semiconductor Ltd.
- Doherty amplifier circuit24 Sep 2026US 2026/0291442 A1Murata Manufacturing Co., Ltd.
- Power amplifier using coupler and electronic device including the same24 Sep 2026US 2026/0291443 A1Research & Business Foundation Sungkyunkwan University
Most cited
By later US patents
- Efficient parallel-stage power amplifier252US 5,872,481 AQUALCOMM Incorporated · 1999
- Multi-stage high efficiency linear power amplifier and method therefor219US 5,786,727 AMotorola, Inc. · 1998
- High-frequency amplifier, transmitting device and receiving device216US 5,903,854 ASony Corporation · 1999
- Apparatus and methods for envelope tracking202US 8,718,188 B2Skyworks Solutions, Inc. · 2014
- Amplification using amplitude reconstruction of amplitude and/or angle modulated carrier176US 6,147,553 AFujant, Inc. · 2000