H03F 3/34
Dc amplifiers in which all stages are dc-coupled
Official title: DC amplifiers in which all stages are DC-coupled (H03F3/45 takes precedence)
H03F3/34 (Dc amplifiers in which all stages are dc-coupled) appears on 1,134 US grants and 647 published applications in this corpus.
Search patents in H03F- Granted patents
- 1,134
- Published applications
- 647
- Assignees
- 435
- Inventors
- 1,727
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 34 | 0 |
| 1978 | 10 | 0 |
| 1979 | 9 | 0 |
| 1980 | 5 | 0 |
| 1981 | 17 | 0 |
| 1982 | 20 | 0 |
| 1983 | 14 | 0 |
| 1984 | 18 | 0 |
| 1985 | 30 | 0 |
| 1986 | 19 | 0 |
| 1987 | 8 | 0 |
| 1988 | 14 | 0 |
| 1989 | 23 | 0 |
| 1990 | 11 | 0 |
| 1991 | 22 | 0 |
| 1992 | 14 | 0 |
| 1993 | 7 | 0 |
| 1994 | 22 | 0 |
| 1995 | 31 | 0 |
| 1996 | 17 | 0 |
| 1997 | 25 | 0 |
| 1998 | 24 | 0 |
| 1999 | 30 | 0 |
| 2000 | 23 | 0 |
| 2001 | 35 | 7 |
| 2002 | 33 | 36 |
| 2003 | 36 | 28 |
| 2004 | 40 | 35 |
| 2005 | 30 | 53 |
| 2006 | 37 | 62 |
| 2007 | 56 | 48 |
| 2008 | 43 | 30 |
| 2009 | 35 | 18 |
| 2010 | 33 | 25 |
| 2011 | 19 | 17 |
| 2012 | 11 | 20 |
| 2013 | 19 | 7 |
| 2014 | 13 | 10 |
| 2015 | 7 | 13 |
| 2016 | 15 | 12 |
| 2017 | 19 | 10 |
| 2018 | 13 | 23 |
| 2019 | 27 | 28 |
| 2020 | 24 | 27 |
| 2021 | 25 | 30 |
| 2022 | 27 | 28 |
| 2023 | 21 | 31 |
| 2024 | 22 | 18 |
| 2025 | 22 | 19 |
| 2026 | 7 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Current mirror circuit16 Jun 2026US 12,656,805 B2Socionext Inc.
- Methods and apparatus to generate and compensate an output voltage of regulator circuitry16 Jun 2026US 12,658,794 B2Texas Instruments Incorporated
- Offset correction circuit24 Feb 2026US 12,562,703 B2Mitsubishi Electric Corporation
- Potentiostat with offset calibration17 Feb 2026US 12,553,858 B2Semiconductor Components Industries, LLC
- Amplifier circuit and composite circuit20 Jan 2026US 12,531,530 B2Mitsubishi Electric Corporation
- Bias voltage generation circuit and electronic circuit27 Aug 2026US 2026/0252135 A1Nisshinbo Micro Devices Inc.
- Voltage/current conversion device and current source device23 Jul 2026US 2026/0211438 A1Thine Electronics, Inc.
- Dc coupled amplifier and equalizer circuit2 Jul 2026US 2026/0189187 A1MACOM Technology Solutions Holdings, Inc.
- Load Regulation for LDO with Low Loop Gain25 Jun 2026US 2026/0180516 A1pSemi Corporation
- Circuit having Multiple Cascode Amplifiers and Controllable Components25 Jun 2026US 2026/0180531 A1
Most cited
By later US patents
- Subthreshold CMOS amplifier with wide input voltage range126US 5,095,284 ASynaptics Incorporated · 1992
- Series connected multi-stage linear FET amplifier circuit123US 6,225,866 B1Sharp Kabushiki Kaisha · 2001
- Gate-coupled field-effect transistor pair amplifier114US 4,518,926 AAT&T Bell Laboratories · 1985
- Static high speed comparator108US 5,488,321 ARambus Inc. · 1996
- Signal conditioning circuit apparatus and method70US 5,792,956 ABently Nevada, LLC · 1998