H03F 3/4578
In differential amplifiers with bifet transistors as the active amplifying circuit
Official title: {in differential amplifiers with BiFET transistors as the active amplifying circuit}
H03F3/4578 (In differential amplifiers with bifet transistors as the active amplifying circuit) appears on 44 US grants and 35 published applications in this corpus.
Search patents in H03F- Granted patents
- 44
- Published applications
- 35
- Assignees
- 38
- Inventors
- 87
- Latest grant
- 22 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 4 | 1 |
| 2005 | 1 | 2 |
| 2006 | 2 | 3 |
| 2007 | 3 | 4 |
| 2008 | 4 | 2 |
| 2009 | 2 | 1 |
| 2010 | 4 | 4 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 2 | 2 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 2 |
| 2022 | 2 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Operational amplifier for use in coulomb counter circuit22 Apr 2025US 12,283,928 B2Cirrus Logic, Inc.
- Setting a stable operating point and EMI control of an H-bridge output stage25 Mar 2025US 12,261,548 B2Analog Devices International Unlimited Company
- Low noise amplifier circuit for a thermal varying resistance6 Feb 2024US 11,894,810 B2STMicroelectronics S,r.l.
- Low noise amplifier circuit for a thermal varying resistance1 Nov 2022US 11,489,496 B2STMicroelectronics S,r.l.
- Operational amplifier26 Apr 2022US 11,316,480 B2RichWave Technology Corp.
- Bias circuit30 Apr 2026US 2026/0121599 A1NXP B. V.
- Decision feedback equalizer (dfe) summer17 Jul 2025US 2025/0233567 A1QUALCOMM Incorporated
- Offset calibration for signal rms measurement13 Feb 2025US 2025/0055431 A1MACOM Technology Solutions Holdings, Inc.
- Precision operational amplifier with a floating input stage21 Mar 2024US 2024/0097631 A1Semiconductor Components Industries, LLC
- Low noise amplifier circuit for a thermal varying resistance12 Jan 2023US 2023/0009311 A1STMicroelectronics S,r.l.
Most cited
By later US patents
- Circuit and method for compensating for offset voltage52US 7,227,389 B2Samsung Electro-Mechanics Co., Ltd. · 2007
- Balanced differential amplifier having common mode feedback with kick-start47US 6,265,941 B1Agere Systems Guardian Corp. · 2001
- High speed fully differential operational amplifier with fast settling time for switched capacitor applications32US 5,847,607 ANational Semiconductor Corporation · 1998
- Rail-to-rail input stages with constant g.sub.m and constant common-mode output currents31US 5,734,297 APhilips Electronics North America Corporation · 1998
- Buffer circuit for op amp output stage31US 6,714,076 B1Analog Devices, Inc. · 2004