H03F 1/0222
By using a signal derived from the input signal
Official title: {by using a signal derived from the input signal}
H03F1/0222 (By using a signal derived from the input signal) appears on 1,900 US grants and 2,017 published applications in this corpus.
Search patents in H03F- Granted patents
- 1,900
- Published applications
- 2,017
- Assignees
- 411
- Inventors
- 2,248
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 7 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 8 | 0 |
| 1999 | 16 | 0 |
| 2000 | 22 | 0 |
| 2001 | 11 | 5 |
| 2002 | 18 | 17 |
| 2003 | 22 | 12 |
| 2004 | 22 | 26 |
| 2005 | 15 | 30 |
| 2006 | 37 | 31 |
| 2007 | 23 | 39 |
| 2008 | 24 | 36 |
| 2009 | 20 | 33 |
| 2010 | 41 | 50 |
| 2011 | 48 | 47 |
| 2012 | 62 | 89 |
| 2013 | 62 | 99 |
| 2014 | 91 | 108 |
| 2015 | 125 | 136 |
| 2016 | 138 | 138 |
| 2017 | 149 | 112 |
| 2018 | 136 | 112 |
| 2019 | 112 | 103 |
| 2020 | 123 | 142 |
| 2021 | 91 | 106 |
| 2022 | 88 | 126 |
| 2023 | 86 | 133 |
| 2024 | 101 | 117 |
| 2025 | 100 | 95 |
| 2026 | 68 | 75 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power amplifier6 Oct 2026US 12,756,362 B2Himax Technologies Limited
- Progressive envelope tracking with delay compensation15 Sep 2026US 12,738,894 B2Qorvo US, Inc.
- Bias circuit and power amplifier circuit15 Sep 2026US 12,738,897 B2Murata Manufacturing Co., Ltd.
- Envelope tracking supply modulator topology for wide-bandwidth radio frequency transmitter8 Sep 2026US 12,732,138 B2Mediatek Inc.
- Audio signal amplifying device and method25 Aug 2026US 12,719,412 B2Realtek Semiconductor Corp.
- Audio envelope tracking for controlling a tracking power supply8 Oct 2026US 2026/0312540 A1Harman Becker Automotive Systems GmbH
- Adaptive biasing in a power amplifier circuit1 Oct 2026US 2026/0303023 A1Qorvo US, Inc.
- Power management circuit24 Sep 2026US 2026/0291439 A1Qorvo US, Inc.
- Apparatus and methods for delay calibration of load modulated power amplifiers and envelope trackers24 Sep 2026US 2026/0291446 A1Skyworks Solutions, Inc.
- Switching amplifiers24 Sep 2026US 2026/0291452 A1Cirrus Logic International Semiconductor Ltd.
Most cited
By later US patents
- 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
- Power- conserving drive-modulation method for envelope-elimination-and-restoration (EER) transmitters243US 6,256,482 B12001
- Buck or boost power converter211US 6,348,781 B1Motorola, Inc. · 2002
- Apparatus and methods for envelope tracking202US 8,718,188 B2Skyworks Solutions, Inc. · 2014