H03F 3/45484
In differential amplifiers with bipolar transistors as the active amplifying circuit
Official title: {in differential amplifiers with bipolar transistors as the active amplifying circuit (H03F3/4578 takes precedence)}
H03F3/45484 (In differential amplifiers with bipolar transistors as the active amplifying circuit) appears on 356 US grants and 229 published applications in this corpus.
Search patents in H03F- Granted patents
- 356
- Published applications
- 229
- Assignees
- 197
- Inventors
- 609
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 8 | 0 |
| 2001 | 18 | 6 |
| 2002 | 18 | 11 |
| 2003 | 18 | 7 |
| 2004 | 7 | 6 |
| 2005 | 12 | 17 |
| 2006 | 12 | 4 |
| 2007 | 7 | 9 |
| 2008 | 9 | 11 |
| 2009 | 16 | 14 |
| 2010 | 10 | 10 |
| 2011 | 7 | 2 |
| 2012 | 9 | 5 |
| 2013 | 6 | 7 |
| 2014 | 8 | 5 |
| 2015 | 5 | 9 |
| 2016 | 9 | 7 |
| 2017 | 10 | 9 |
| 2018 | 11 | 11 |
| 2019 | 12 | 12 |
| 2020 | 14 | 16 |
| 2021 | 15 | 9 |
| 2022 | 9 | 8 |
| 2023 | 7 | 11 |
| 2024 | 8 | 13 |
| 2025 | 10 | 3 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Receiver circuit and optical receiver circuit4 Aug 2026US 12,700,841 B2Sumitomo Electric Industries, Ltd.
- Input stage circuit for an operational amplifier with enhanced input offset voltage trimming capabilities14 Jul 2026US 12,683,567 B2Zjw Microelectronics North America Inc.
- Built-in ripple injection circuit and control chip30 Jun 2026US 12,671,316 B2Shanghai Bright Power Semiconductor Co., Ltd.
- Reception apparatus to receive signals using circuit current consumption, communication system, and method for controlling reception apparatus10 Feb 2026US 12,549,211 B2Canon Kabushiki Kaisha
- Analog front end with compensated open loop stage20 Aug 2026US 2026/0246430 A1STMicroelectronics International N. V.
- Signal generation circuit6 Aug 2026US 2026/0230042 A1The Ritsumeikan Trust
- Transimpedance amplifier adaptive to input current variation and output voltage level shift16 Apr 2026US 2026/0106585 A1Raytheon Company
- Signal processing circuit16 Apr 2026US 2026/0106588 A1Fuji Electric Co., Ltd.
- Semiconductor circuit for reducing output distortion12 Mar 2026US 2026/0074657 A1Sound Semiconductor, Inc.
Most cited
By later US patents
- Differential DC offset compensation circuit181US 5,471,665 AMotorola, Inc. · 1995
- Linear variable gain amplifiers137US 6,563,382 B1International Business Machines Corporation · 2003
- Device for changing the electrical circuit configuration of integrated semiconductor circuits87US 4,438,347 ASiemens Aktiengesellschaft · 1984
- Differential amplifier with rail-to-rail input capability and controlled transconductance84US 4,555,673 ASignetics Corporation · 1985
- Apparatus with distortion cancelling feedback signal65US 5,613,233 ARockwell International Corporation · 1997