H03F 1/32
Modifications of amplifiers to reduce non-linear distortion
Official title: Modifications of amplifiers to reduce non-linear distortion (by negative feedback H03F1/34)
H03F1/32 (Modifications of amplifiers to reduce non-linear distortion) appears on 5,869 US grants and 5,062 published applications in this corpus.
Search patents in H03F- Granted patents
- 5,869
- Published applications
- 5,062
- Assignees
- 1,312
- Inventors
- 7,629
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 3 | 0 |
| 1978 | 16 | 0 |
| 1979 | 12 | 0 |
| 1980 | 9 | 0 |
| 1981 | 16 | 0 |
| 1982 | 28 | 0 |
| 1983 | 21 | 0 |
| 1984 | 24 | 0 |
| 1985 | 30 | 0 |
| 1986 | 32 | 0 |
| 1987 | 19 | 0 |
| 1988 | 28 | 0 |
| 1989 | 30 | 0 |
| 1990 | 21 | 0 |
| 1991 | 47 | 0 |
| 1992 | 63 | 0 |
| 1993 | 40 | 0 |
| 1994 | 47 | 0 |
| 1995 | 43 | 0 |
| 1996 | 70 | 0 |
| 1997 | 56 | 0 |
| 1998 | 73 | 0 |
| 1999 | 107 | 0 |
| 2000 | 105 | 0 |
| 2001 | 118 | 33 |
| 2002 | 121 | 142 |
| 2003 | 129 | 163 |
| 2004 | 161 | 175 |
| 2005 | 125 | 220 |
| 2006 | 201 | 201 |
| 2007 | 181 | 257 |
| 2008 | 205 | 223 |
| 2009 | 188 | 177 |
| 2010 | 209 | 212 |
| 2011 | 216 | 152 |
| 2012 | 181 | 200 |
| 2013 | 236 | 226 |
| 2014 | 220 | 233 |
| 2015 | 279 | 256 |
| 2016 | 263 | 229 |
| 2017 | 279 | 227 |
| 2018 | 233 | 224 |
| 2019 | 256 | 213 |
| 2020 | 220 | 253 |
| 2021 | 190 | 194 |
| 2022 | 189 | 181 |
| 2023 | 126 | 183 |
| 2024 | 129 | 189 |
| 2025 | 149 | 177 |
| 2026 | 110 | 122 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fully integrated CMOS multiple MOSFET-stacked double push-pull RF power amplifier29 Sep 2026US 12,750,012 B2Shanghai WUQI Microelectronics Co., Ltd.
- Apparatus and method for digital predistortion initialization of high-power amplifiers29 Sep 2026US 12,750,013 B2L3Harris Technologies, Inc.
- Tunable effective inductance for multi-gain LNA with inductive source degeneration29 Sep 2026US 12,750,026 B2pSemi Corporation
- Broadband LNA structure using offset active coupled segments8 Sep 2026US 12,732,139 B2Qorvo US, Inc.
- Highly efficient dual-drive power amplifier for high reliability applications8 Sep 2026US 12,732,143 B2Georgia Tech Research Corporation
- Wireless Amplifier Circuitry with Non-Linearity Suppression1 Oct 2026US 2026/0303034 A1Apple Inc.
- Circuit and Method for Operating a Circuit1 Oct 2026US 2026/0303035 A1Delft Semiconductor B.V.
- Methods and Apparatus for Linearization of a Power Amplifier Output1 Oct 2026US 2026/0303134 A1
- Methods and Apparatuses for Amplitude-Only Out-of-Band DPD1 Oct 2026US 2026/0303135 A1
- Power amplification and coupling circuit with transformer line24 Sep 2026US 2026/0291441 A1Jabil Inc.
Most cited
By later US patents
- Non-linear adaptive AM/AM and AM/PM pre-distortion compensation with time and temperature compensation for low power applications412US 7,215,716 B12007
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- Distortion compensation apparatus and distortion compensation method358US 9,397,619 B2Fujitsu Limited · 2016
- 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