H03F 3/45376
Using junction fet transistors as the active amplifying circuit
Official title: {using junction FET transistors as the active amplifying circuit (H03F3/45278 takes precedence)}
H03F3/45376 (Using junction fet transistors as the active amplifying circuit) appears on 152 US grants and 94 published applications in this corpus.
Search patents in H03F- Granted patents
- 152
- Published applications
- 94
- Assignees
- 84
- Inventors
- 228
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 6 | 4 |
| 2004 | 4 | 4 |
| 2005 | 2 | 5 |
| 2006 | 4 | 1 |
| 2007 | 3 | 0 |
| 2008 | 2 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 3 |
| 2012 | 3 | 1 |
| 2013 | 1 | 5 |
| 2014 | 3 | 0 |
| 2015 | 1 | 6 |
| 2016 | 5 | 7 |
| 2017 | 6 | 4 |
| 2018 | 4 | 8 |
| 2019 | 11 | 6 |
| 2020 | 9 | 5 |
| 2021 | 3 | 4 |
| 2022 | 3 | 3 |
| 2023 | 2 | 10 |
| 2024 | 5 | 5 |
| 2025 | 5 | 3 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 3/45381Long tailed pairs91
- H03F 3/45394Pl types11
- H03F 3/45434Complementary long tailed pairs having parallel inputs and being supplied in series4
- H03F 3/45461Complementary cross coupled types4
- H03F 3/45408Complementary long tailed pairs having parallel inputs and being supplied in parallel3
- H03F 3/4547Mirror types2
- H03F 3/45466Complementary non-cross coupled types1
- H03F 3/45421Complementary pl types having parallel inputs and being supplied in parallel0
All 9 subgroupsShow fewer
Recent patents
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Most cited
By later US patents
- Differential to single-ended converter with large output swing34US 6,606,489 B2RF Micro Devices, Inc. · 2003
- Operational amplifier with independent input offset trim for high and low common mode input voltages30US 6,696,894 B1Analog Devices, Inc. · 2004
- Audio power amplifier29US 4,241,313 ANippon Gakki Seizo Kabushiki Kaisha · 1980
- Gallium arsenide differential amplifier with closed loop bias stabilization29US 4,616,189 ATriQuint Semiconductor, Inc. · 1986
- Amplifying circuit for an integrated circuit with low-noise characteristic28US 5,648,743 AFujitsu Limited · 1997