H03F 1/3223
Using feed-forward
Official title: {using feed-forward (H03F1/3211 takes precedence)}
H03F1/3223 (Using feed-forward) appears on 722 US grants and 451 published applications in this corpus.
Search patents in H03F- Granted patents
- 722
- Published applications
- 451
- Assignees
- 273
- Inventors
- 1,001
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 15 | 0 |
| 1993 | 4 | 0 |
| 1994 | 10 | 0 |
| 1995 | 7 | 0 |
| 1996 | 18 | 0 |
| 1997 | 13 | 0 |
| 1998 | 21 | 0 |
| 1999 | 31 | 0 |
| 2000 | 36 | 0 |
| 2001 | 37 | 9 |
| 2002 | 40 | 39 |
| 2003 | 28 | 48 |
| 2004 | 46 | 44 |
| 2005 | 34 | 34 |
| 2006 | 42 | 29 |
| 2007 | 30 | 26 |
| 2008 | 16 | 18 |
| 2009 | 13 | 13 |
| 2010 | 26 | 15 |
| 2011 | 14 | 10 |
| 2012 | 10 | 14 |
| 2013 | 23 | 19 |
| 2014 | 12 | 10 |
| 2015 | 19 | 13 |
| 2016 | 15 | 13 |
| 2017 | 13 | 10 |
| 2018 | 12 | 15 |
| 2019 | 11 | 9 |
| 2020 | 11 | 9 |
| 2021 | 6 | 12 |
| 2022 | 12 | 14 |
| 2023 | 5 | 8 |
| 2024 | 12 | 8 |
| 2025 | 6 | 7 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low noise amplifier with post distortion circuit25 Aug 2026US 12,719,414 B2Northrop Grumman Systems Corporation
- Feedforward amplifier circuit, audio amplifier and audio playing device3 Mar 2026US 12,567,839 B2Guangzhou Topping Electronics and Technology Co., Ltd.
- Low noise amplifier (LNA) with distortion and noise cancellation24 Feb 2026US 12,562,696 B2Qorvo US, Inc.
- Adaptive biasing procedure to increase auxiliary PA efficiency for an integrated echo canceller23 Dec 2025US 12,506,515 B2Zebra Technologies Corporation
- Power amplifier system25 Nov 2025US 12,483,204 B2Qorvo US, Inc.
- Feed-forward amplifier and method for transitioning between offline and online tuning states2 Jul 2026US 2026/0189195 A1
- Similar combination and cancellation power amplifier circuit30 Apr 2026US 2026/0121589 A1Accula Electronic Technologies Pte Ltd
- Amplifier device with feedback and feed-forward control30 Apr 2026US 2026/0121592 A1Prodrive Technologies Innovation Services B.V.
- Digitally controlled even harmonic distortion correction19 Mar 2026US 2026/0081567 A1Skyworks Solutions, Inc.
- Second Order Intermodulation Injection for Non-linearity Cancellation12 Feb 2026US 2026/0045912 A1Apple Inc.
Most cited
By later US patents
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- Power waveform synthesis using bilateral devices243US 5,930,128 AEricsson Inc. · 1999
- Envelope feedforward technique with power control for efficient linear RF power amplification190US 6,404,823 B1Conexant Systems, Inc. · 2002
- Linearized power amplifier177US 5,420,536 AVictoria University of Technology · 1995
- Adaptive digital predistortion linearization and feed-forward correction of RF power amplifier136US 5,949,283 ASpectrian Corporation · 1999