H03F 2203/50
Indexing scheme relating to amplifiers in which input being applied to, or
Official title: Indexing scheme relating to amplifiers in which input being applied to, or output being derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
H03F2203/50 (Indexing scheme relating to amplifiers in which input being applied to, or) appears on 144 US grants and 140 published applications in this corpus.
Search patents in H03F- Granted patents
- 144
- Published applications
- 140
- Assignees
- 111
- Inventors
- 282
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 3 | 2 |
| 2005 | 2 | 3 |
| 2006 | 5 | 7 |
| 2007 | 6 | 12 |
| 2008 | 10 | 12 |
| 2009 | 11 | 16 |
| 2010 | 15 | 11 |
| 2011 | 11 | 7 |
| 2012 | 5 | 4 |
| 2013 | 3 | 4 |
| 2014 | 6 | 0 |
| 2015 | 1 | 4 |
| 2016 | 4 | 3 |
| 2017 | 5 | 7 |
| 2018 | 4 | 10 |
| 2019 | 8 | 0 |
| 2020 | 3 | 4 |
| 2021 | 6 | 6 |
| 2022 | 2 | 4 |
| 2023 | 4 | 8 |
| 2024 | 5 | 5 |
| 2025 | 6 | 6 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 2203/5031The source circuit of the follower being a current sourceIndexing code42
- H03F 2203/5021The source follower has a controlled source circuitIndexing code26
- H03F 2203/5012The source follower has a controlled source circuit, the controlling signal beingIndexing code21
- H03F 2203/5036The source follower has a resistor in its source circuitIndexing code21
- H03F 2203/5027The source follower has a current mirror output circuit in its sourceIndexing code20
- H03F 2203/5033Two source followers are controlled at their inputs by a differential signalIndexing code18
- H03F 2203/5018The source follower has a controlled source circuit, the controlling signal beingIndexing code13
- H03F 2203/5003The sources of two source followers are differentially coupledIndexing code11
All 15 subgroupsShow fewer
- H03F 2203/5024The source follower has a controlled source circuit, the source circuit beingIndexing code10
- H03F 2203/5015The source follower has a controlled source circuit, the controlling signal beingIndexing code9
- H03F 2203/5039The source circuit of the follower has one or more capacitors betweenIndexing code7
- H03F 2203/5042The source circuit of the follower has one or more coils betweenIndexing code7
- H03F 2203/5009The output signal being capacitively coupled to the source of the sourceIndexing code4
- H03F 2203/5006The input signal being capacitively coupled to the gate of the sourceIndexing code3
- H03F 2203/5045The source follower has a level shifter between source and outputIndexing code2
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Most cited
By later US patents
- Parallel HV MOSFET high power stable amplifier119US 6,046,641 AENI Technologies, Inc. · 2000
- Differential amplifiers which can form a residue amplifier in sub-ranging A/D converters84US 5,530,444 AAnalog Devices, Inc. · 1996
- High frequency module including a flexible substrate72US 5,438,305 AHitachi Denshi Kabushiki Kaisha · 1995
- Source/emitter follower buffer driving a switching load and having improved linearity44US 7,804,328 B2Texas Instruments Incorporated · 2010
- Level converter and circuit arrangement comprising such level converters43US 11,942,934 B2Robert Bosch GmbH · 2024