H03F 3/50
Amplifiers in which input is applied to, or output is derived from
Official title: Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
H03F3/50 (Amplifiers in which input is applied to, or output is derived from) appears on 572 US grants and 443 published applications in this corpus.
Search patents in H03F- Granted patents
- 572
- Published applications
- 443
- Assignees
- 288
- Inventors
- 974
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 6 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 13 | 0 |
| 1995 | 13 | 0 |
| 1996 | 4 | 0 |
| 1997 | 8 | 0 |
| 1998 | 3 | 0 |
| 1999 | 13 | 0 |
| 2000 | 9 | 0 |
| 2001 | 10 | 1 |
| 2002 | 6 | 5 |
| 2003 | 14 | 12 |
| 2004 | 8 | 18 |
| 2005 | 9 | 12 |
| 2006 | 16 | 27 |
| 2007 | 22 | 22 |
| 2008 | 16 | 22 |
| 2009 | 21 | 21 |
| 2010 | 27 | 18 |
| 2011 | 19 | 16 |
| 2012 | 11 | 19 |
| 2013 | 16 | 12 |
| 2014 | 16 | 11 |
| 2015 | 9 | 18 |
| 2016 | 21 | 15 |
| 2017 | 22 | 13 |
| 2018 | 18 | 28 |
| 2019 | 25 | 14 |
| 2020 | 17 | 23 |
| 2021 | 22 | 18 |
| 2022 | 10 | 18 |
| 2023 | 15 | 22 |
| 2024 | 17 | 24 |
| 2025 | 18 | 18 |
| 2026 | 6 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Envelope tracking integrated circuit operable across wide modulation bandwidth12 May 2026US 12,627,269 B2Qorvo US, Inc.
- Bias circuit for stacked power amplifiers with a variable power supply5 May 2026US 12,620,942 B2Murata Manufacturing Co., Ltd.
- Low power voltage reference31 Mar 2026US 12,591,262 B2Nordic Semiconductor ASA
- Low distortion driver for analog-to-digital converter (ADC)24 Mar 2026US 12,587,203 B2Texas Instruments Incorporated
- Amplifier circuit and composite circuit20 Jan 2026US 12,531,530 B2Mitsubishi Electric Corporation
- Driver amplifier including parallel-integrated flipped voltage follower and source follower30 Jul 2026US 2026/0221170 A1QUALCOMM Incorporated
- Transimpedance amplifier with low supply voltage16 Jul 2026US 2026/0205079 A1Mediatek Inc.
- Amplifier circuit and mass spectrometer including same25 Jun 2026US 2026/0180524 A1Hitachi High-Tech Corporation
- Common source and source follower buffer to interface up-converter and driver amplifier25 Jun 2026US 2026/0180529 A1QUALCOMM Incorporated
- Integrated resistive element operative as sensing unit with improved sensing accuracy and electronic apparatus comprising the same11 Jun 2026US 2026/0163535 A1Monolithic Power Systems, Inc.
Most cited
By later US patents
- Parallel HV MOSFET high power stable amplifier119US 6,046,641 AENI Technologies, Inc. · 2000
- Gate-coupled field-effect transistor pair amplifier114US 4,518,926 AAT&T Bell Laboratories · 1985
- High speed buffer circuit particularly suited for use in sample and hold circuits108US 4,612,464 ASony Corporation · 1986
- BiCMOS devices97US 5,856,695 AHarris Corporation · 1999
- Receiving circuit92US 6,600,795 B1Matsushita Electric Industrial Co., Ltd. · 2003