H03F 3/4521
Complementary long tailed pairs having parallel inputs and being supplied in parallel
Official title: {Complementary long tailed pairs having parallel inputs and being supplied in parallel}
H03F3/4521 (Complementary long tailed pairs having parallel inputs and being supplied in parallel) appears on 496 US grants and 379 published applications in this corpus.
Search patents in H03F- Granted patents
- 496
- Published applications
- 379
- Assignees
- 215
- Inventors
- 737
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 11 | 0 |
| 1995 | 12 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 14 | 2 |
| 2002 | 14 | 12 |
| 2003 | 16 | 15 |
| 2004 | 15 | 18 |
| 2005 | 14 | 16 |
| 2006 | 13 | 12 |
| 2007 | 13 | 16 |
| 2008 | 15 | 20 |
| 2009 | 20 | 17 |
| 2010 | 21 | 15 |
| 2011 | 13 | 16 |
| 2012 | 14 | 11 |
| 2013 | 16 | 10 |
| 2014 | 9 | 10 |
| 2015 | 8 | 5 |
| 2016 | 8 | 12 |
| 2017 | 13 | 19 |
| 2018 | 18 | 18 |
| 2019 | 27 | 30 |
| 2020 | 34 | 23 |
| 2021 | 15 | 13 |
| 2022 | 17 | 16 |
| 2023 | 10 | 9 |
| 2024 | 10 | 21 |
| 2025 | 9 | 10 |
| 2026 | 8 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Current equalization circuitry for the folded branch of a rail-to-rail input ota with ab-class output stage15 Sep 2026US 12,738,909 B2STMicroelectronics International N. V.
- Low second harmonic single ended class AB amplifier4 Aug 2026US 12,700,840 B2Texas Instruments Incorporated
- Current sensor28 Jul 2026US 12,693,316 B2Rohm Co., 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.
- Comparator with reduced power consumption30 Jun 2026US 12,671,377 B2Nordic Semiconductor ASA
- Amplifier device and power supply device20 Aug 2026US 2026/0246434 A1Denso Corporation
- Differential amplifier and data driving device6 Aug 2026US 2026/0230050 A1Lx Semicon Co., Ltd.
- Operational transconductance amplifier (ota) with separate cascode paths for reconfigurable input pairs23 Jul 2026US 2026/0213718 A1QUALCOMM Incorporated
- Operational amplifier with enhanced input slew rate16 Jul 2026US 2026/0205078 A1Novatek Microelectronics Corp.
- Amplifier circuit, comparator, and solid-state imaging device28 May 2026US 2026/0149422 A1Sony Semiconductor Solutions Corporation
Most cited
By later US patents
- CMOS Operational amplifier225US 4,554,515 AAT&T Laboratories · 1985
- Differential amplifier with rail-to-rail input capability and controlled transconductance84US 4,555,673 ASignetics Corporation · 1985
- Differential comparator circuit having a wide common mode input range83US 9,178,503 B2Xilinx, Inc. · 2015
- Combination driver-summing circuit for rail-to-rail differential amplifier71US 5,311,145 ANorth American Philips Corporation · 1994
- MOSFET single-pair differential amplifier having an adaptive biasing scheme for rail-to-rail input capability70US 6,281,753 B1Texas Instruments Incorporated · 2001