H03F 2203/30012
The two sepp amplifying transistors are darlington composite transistors
Official title: the two SEPP amplifying transistors are Darlington composite transistors
H03F2203/30012 (The two sepp amplifying transistors are darlington composite transistors) appears on 8 US grants and 6 published applications in this corpus.
Search patents in H03F- Granted patents
- 8
- Published applications
- 6
- Assignees
- 6
- Inventors
- 7
- Latest grant
- 21 Feb 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
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| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
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| 1990 | 0 | 0 |
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| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Signal amplifier circuit, voltage converter and system21 Feb 2023US 11,588,446 B2Burmester Audiosysteme GmbH
- Signal amplifier circuit, voltage converter and system12 Jul 2022US 11,387,787 B2Burmester Audiosysteme GmbH
- Controlling a power amplification stage of an audio signal amplifier23 Jul 2019US 10,361,672 B2Entotem Limited
- Controlling a power amplification stage of an audio signal amplifier3 Jul 2018US 10,014,840 B2Entotem Limited
- Operational amplifier26 Sep 2006US 7,113,041 B2Fujitsu Limited
- Signal amplifier circuit, voltage converter and system15 Sep 2022US 2022/0294397 A1Burmester Audiosysteme GmbH
- Signal amplifier circuit, voltage converter and system7 May 2020US 2020/0144974 A1Tigris Elektronik GmbH
- Controlling a Power Amplification Stage of an Audio Signal Amplifier4 Oct 2018US 2018/0287579 A1Entotem Limited
- Controlling a Power Amplification Stage of an Audio Signal Amplifier31 Aug 2017US 2017/0250665 A1Entotem Limited
- Operational amplifier18 Aug 2005US 2005/0179496 A1Fujitsu Limited
Most cited
By later US patents
- Complementary-FET driver circuitry for push-pull class B transistor amplifiers26US 4,159,450 ARCA Corporation · 1979
- Bipolar-plus-DMOS mixed-typology power output stage3US 6,222,414 B1SGS-Thomson Microelectronics S.A. · 2001
- Controlling a power amplification stage of an audio signal amplifier2US 10,361,672 B2Entotem Limited · 2019
- Operational amplifier1US 6,903,609 B2Fujitsu Limited · 2005