H03F 1/22
By use of cascode coupling, i.e. earthed cathode or emitter stage followed
Official title: by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively
H03F1/22 (By use of cascode coupling, i.e. earthed cathode or emitter stage followed) appears on 1,751 US grants and 1,793 published applications in this corpus.
Search patents in H03F- Granted patents
- 1,751
- Published applications
- 1,793
- Assignees
- 493
- Inventors
- 2,578
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 10 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 11 | 0 |
| 1995 | 8 | 0 |
| 1996 | 8 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 12 | 0 |
| 2000 | 25 | 0 |
| 2001 | 17 | 4 |
| 2002 | 30 | 27 |
| 2003 | 26 | 22 |
| 2004 | 26 | 29 |
| 2005 | 27 | 47 |
| 2006 | 40 | 40 |
| 2007 | 37 | 48 |
| 2008 | 41 | 55 |
| 2009 | 38 | 40 |
| 2010 | 63 | 57 |
| 2011 | 60 | 51 |
| 2012 | 55 | 55 |
| 2013 | 45 | 71 |
| 2014 | 78 | 101 |
| 2015 | 93 | 89 |
| 2016 | 90 | 90 |
| 2017 | 88 | 72 |
| 2018 | 95 | 109 |
| 2019 | 113 | 91 |
| 2020 | 89 | 96 |
| 2021 | 82 | 85 |
| 2022 | 66 | 101 |
| 2023 | 71 | 126 |
| 2024 | 85 | 121 |
| 2025 | 102 | 100 |
| 2026 | 61 | 66 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tunable effective inductance for multi-gain LNA with inductive source degeneration29 Sep 2026US 12,750,026 B2pSemi Corporation
- Low noise amplifier with post distortion circuit25 Aug 2026US 12,719,414 B2Northrop Grumman Systems Corporation
- Scalable periphery tunable matching power amplifier25 Aug 2026US 12,719,415 B2pSemi Corporation
- Low noise amplification circuit25 Aug 2026US 12,719,416 B2RadRock (Chongqing) Tech Co., Ltd.
- Multi-mode broadband low noise amplifier18 Aug 2026US 12,712,497 B2Skyworks Solutions, Inc.
- Wideband amplifier with one-bit step attenuation1 Oct 2026US 2026/0303036 A1Northrop Grumman Systems Corporation
- Differential radio frequency amplifier1 Oct 2026US 2026/0303040 A1Skyworks Solutions, Inc.
- Power amplifier circuit24 Sep 2026US 2026/0291450 A1Murata Manufacturing Co., Ltd.
- Damping resonance element with double-sided dc feeding technique for dc to mm-wave high gain cascode single-ended/differential distributed amplifier17 Sep 2026US 2026/0280506 A1Ciena Corporation
- Doherty amplifier10 Sep 2026US 2026/0269789 A1Murata Manufacturing Co., Ltd.
Most cited
By later US patents
- Envelope feedforward technique with power control for efficient linear RF power amplification190US 6,404,823 B1Conexant Systems, Inc. · 2002
- Stacked transistor method and apparatus171US 7,248,120 B2Peregrine Semiconductor Corporation · 2007
- High power high impedance microwave devices for power applications154US 6,137,367 AAMCOM Communications, Inc. · 2000
- Stacked linear power amplifier with capacitor feedback and resistor isolation135US 8,487,706 B2Peregrine Semiconductor Corporation · 2013
- Narrowband LC folded cascode structure126US 6,094,084 ANortel Networks Limited · 2000