H03F 1/42
Modifications of amplifiers to extend the bandwidth
H03F1/42 (Modifications of amplifiers to extend the bandwidth) appears on 685 US grants and 590 published applications in this corpus.
Search patents in H03F- Granted patents
- 685
- Published applications
- 590
- Assignees
- 325
- Inventors
- 1,269
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 12 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 5 |
| 2003 | 7 | 6 |
| 2004 | 11 | 12 |
| 2005 | 7 | 14 |
| 2006 | 15 | 17 |
| 2007 | 19 | 24 |
| 2008 | 19 | 15 |
| 2009 | 20 | 21 |
| 2010 | 24 | 19 |
| 2011 | 17 | 11 |
| 2012 | 15 | 13 |
| 2013 | 8 | 18 |
| 2014 | 18 | 31 |
| 2015 | 22 | 28 |
| 2016 | 41 | 30 |
| 2017 | 39 | 35 |
| 2018 | 37 | 30 |
| 2019 | 32 | 25 |
| 2020 | 27 | 24 |
| 2021 | 20 | 37 |
| 2022 | 31 | 52 |
| 2023 | 28 | 46 |
| 2024 | 33 | 32 |
| 2025 | 37 | 22 |
| 2026 | 20 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for controlling second harmonic-of power amplifier in wide frequency range6 Oct 2026US 12,756,365 B2Avago Technologies International Sales Pte. Limited
- Variable gain optical modulator with open collector driver amplifier and method of operation15 Sep 2026US 12,738,898 B2MACOM Technology Solutions Holdings, Inc.
- Broadband LNA structure using offset active coupled segments8 Sep 2026US 12,732,139 B2Qorvo US, Inc.
- Multiband power amplifier circuit and radio frequency transceiver18 Aug 2026US 12,712,495 B2Huawei Technologies Co., Ltd.
- Variable gain optical modulator with open collector driver amplifier and method of operation18 Aug 2026US 12,712,508 B2MACOM Technology Solutions Holdings, Inc.
- Wideband amplifier with one-bit step attenuation1 Oct 2026US 2026/0303036 A1Northrop Grumman Systems Corporation
- Power amplification circuit27 Aug 2026US 2026/0254413 A1Murata Manufacturing Co., Ltd.
- Power amplifier arrangement with enhanced bandwidth16 Jul 2026US 2026/0205059 A1Telefonaktiebolaget LM Ericsson (publ)
- Dc coupled amplifier and equalizer circuit2 Jul 2026US 2026/0189187 A1MACOM Technology Solutions Holdings, Inc.
- Power amplifier systems with balun and shunt capacitor2 Jul 2026US 2026/0189203 A1Skyworks Solutions, Inc.
Most cited
By later US patents
- Current-controlled CMOS wideband data amplifier circuits128US 6,624,699 B2Broadcom Corporation · 2003
- High gain wideband driver amplifier104US 6,794,934 B2iTerra Communications, LLC · 2004
- Tunable logarithmic amplifier82US 9,755,580 B2Ethertronics, Inc. · 2017
- Power loop control based envelope tracking79US 9,247,496 B2RF Micro Devices, Inc. · 2016
- Amplifier architecture for multi-carrier wide-band communications70US 6,529,715 B1Lucent Technologies Inc. · 2003