H03F 1/0244
Stepped control
Official title: {Stepped control}
H03F1/0244 (Stepped control) appears on 657 US grants and 624 published applications in this corpus.
Search patents in H03F- Granted patents
- 657
- Published applications
- 624
- Assignees
- 263
- Inventors
- 1,080
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 9 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 8 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 6 |
| 2002 | 11 | 10 |
| 2003 | 10 | 10 |
| 2004 | 12 | 13 |
| 2005 | 5 | 14 |
| 2006 | 17 | 16 |
| 2007 | 10 | 13 |
| 2008 | 12 | 23 |
| 2009 | 7 | 17 |
| 2010 | 22 | 23 |
| 2011 | 19 | 25 |
| 2012 | 28 | 36 |
| 2013 | 36 | 25 |
| 2014 | 32 | 50 |
| 2015 | 39 | 25 |
| 2016 | 33 | 23 |
| 2017 | 31 | 34 |
| 2018 | 40 | 36 |
| 2019 | 34 | 31 |
| 2020 | 45 | 32 |
| 2021 | 23 | 18 |
| 2022 | 11 | 17 |
| 2023 | 16 | 33 |
| 2024 | 15 | 35 |
| 2025 | 26 | 31 |
| 2026 | 21 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Audio amplifier22 Sep 2026US 12,744,498 B2Harman International Industries, Incorporated
- Signal amplifier25 Aug 2026US 12,719,421 B2Renesas Design (UK) Limited
- Direct current power factor correction in a direct current-to-direct current conversion system21 Jul 2026US 12,689,284 B2Cirrus Logic, Inc.
- Class-D amplifier able to reduce power noise21 Jul 2026US 12,689,337 B2Realtek Semiconductor Corp.
- Fast-switching power management integrated circuit26 May 2026US 12,640,646 B2Qorvo US, Inc.
- Low noise low current bias amplifier topology1 Oct 2026US 2026/0303024 A1Analog Devices, Inc.
- Voltage ripple suppression and memory distortion neutralization in a wireless transmission circuit27 Aug 2026US 2026/0254420 A1Qorvo US, Inc.
- Current-accelerated voltage transition in a wireless communication circuit20 Aug 2026US 2026/0246483 A1Qorvo US, Inc.
- Distributed power management circuit30 Jul 2026US 2026/0221942 A1Qorvo US, Inc.
- Stacked feedback transimpedance amplifiers16 Jul 2026US 2026/0205066 A1
Most cited
By later US patents
- Multi-mode amplifier system294US 7,043,213 B2Northrop Grumman Corporation · 2006
- Apparatus and methods for envelope tracking202US 8,718,188 B2Skyworks Solutions, Inc. · 2014
- Multi-mode multi-amplifier architecture158US 6,853,244 B2Northrop Grumman Corporation · 2005
- RF amplifier architecture and related techniques141US 8,824,978 B2Eta Devices, Inc. · 2014
- Linearization circuits and methods for multilevel power amplifier systems133US 8,829,993 B2Eta Devices, Inc. · 2014