H03F 3/45219
Folded cascode stages
Official title: {Folded cascode stages}
H03F3/45219 (Folded cascode stages) appears on 192 US grants and 168 published applications in this corpus.
Search patents in H03F- Granted patents
- 192
- Published applications
- 168
- Assignees
- 119
- Inventors
- 300
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 6 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 1 |
| 2002 | 10 | 7 |
| 2003 | 9 | 9 |
| 2004 | 10 | 7 |
| 2005 | 4 | 3 |
| 2006 | 3 | 5 |
| 2007 | 3 | 6 |
| 2008 | 4 | 10 |
| 2009 | 10 | 8 |
| 2010 | 12 | 7 |
| 2011 | 9 | 8 |
| 2012 | 6 | 5 |
| 2013 | 7 | 3 |
| 2014 | 3 | 5 |
| 2015 | 4 | 2 |
| 2016 | 4 | 4 |
| 2017 | 5 | 8 |
| 2018 | 5 | 5 |
| 2019 | 10 | 9 |
| 2020 | 12 | 11 |
| 2021 | 8 | 7 |
| 2022 | 8 | 7 |
| 2023 | 5 | 5 |
| 2024 | 3 | 8 |
| 2025 | 4 | 8 |
| 2026 | 3 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Interpolation amplifier and source driver comprising the same24 Mar 2026US 12,586,503 B2Anapass Inc.
- Low voltage differential signaling receiver11 Nov 2025US 12,470,438 B2Novatek Microelectronics Corp.
- Rail-to-rail class-AB buffer amplifier with compact adaptive biasing9 Sep 2025US 12,413,193 B2Research & Business Foundation Sungkyunkwan University
- 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.
- Semiconductor devices using complementary field effect transistors (cfets)16 Apr 2026US 2026/0106583 A1Taiwan Semiconductor Manufacturing Company.Ltd
Most cited
By later US patents
- Differential amplifier with rail-to-rail input capability and controlled transconductance84US 4,555,673 ASignetics Corporation · 1985
- Combination driver-summing circuit for rail-to-rail differential amplifier71US 5,311,145 ANorth American Philips Corporation · 1994
- CMOS complementary self-biased differential amplifier with rail-to-rail common-mode input-voltage range66US 4,958,133 AIntel Corporation · 1990
- Folded cascode amplifier with rail-to-rail common-mode range59US 4,797,631 ATexas Instruments Incorporated · 1989
- Adaptive operational amplifier offset voltage trimming system58US 6,194,962 B1Analog Devices, Inc. · 2001