G05F 1/461
Using an operational amplifier as final control device
Official title: {using an operational amplifier as final control device}
G05F1/461 (Using an operational amplifier as final control device) appears on 232 US grants and 217 published applications in this corpus.
Search patents in G05F- Granted patents
- 232
- Published applications
- 217
- Assignees
- 148
- Inventors
- 442
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 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 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 4 |
| 2014 | 5 | 10 |
| 2015 | 8 | 7 |
| 2016 | 9 | 4 |
| 2017 | 7 | 13 |
| 2018 | 21 | 16 |
| 2019 | 30 | 31 |
| 2020 | 21 | 11 |
| 2021 | 11 | 25 |
| 2022 | 33 | 32 |
| 2023 | 32 | 22 |
| 2024 | 15 | 19 |
| 2025 | 16 | 11 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual-input low drop out voltage regulating circuit and controlling circuit including the same29 Sep 2026US 12,749,971 B2Monolithic Power Systems, Inc.
- Method for performing common mode voltage re-biasing in analog front-end circuit of receiver, associated common mode voltage re-biasing circuit, associated receiver and associated integrated circuit29 Sep 2026US 12,750,025 B2Realtek Semiconductor Corp.
- Amplifier with adaptive biasing11 Aug 2026US 12,706,576 B2Texas Instruments Incorporated
- Integrated circuit temperature sensor with a reference voltage source pin5 May 2026US 12,619,269 B2Microchip Touch Solutions Limited
- High accuracy low noise voltage delivery network and method thereof14 Apr 2026US 12,603,617 B2Realtek Semiconductor Corp.
- Electronic device17 Sep 2026US 2026/0277262 A1STMicroelectronics International N. V.
- Voltage drop control circuit for a low power ldo regulator27 Aug 2026US 2026/0252132 A1STMicroelectronics International N. V.
- Circuits and methods for reliable startup of bandgap reference circuits13 Aug 2026US 2026/0236049 A1EM Microelectronic-Marin SA
- Configurable voltage regulator circuit and transmitter circuit16 Jul 2026US 2026/0205135 A1M31 Technology Corporation
- Voltage regulator circuit25 Jun 2026US 2026/0178064 A1Renesas Design (UK) Limited
Most cited
By later US patents
- Magnetic coil power methods and apparatus100US 10,281,540 B2Hyperfine Research, Inc. · 2019
- Systems and methods for DC-to-DC converter control98US 8,710,810 B1Volterra Semiconductor Corporation · 2014
- Magnetic coil power methods and apparatus82US 10,222,435 B2Hyperfine Research, Inc. · 2019
- Magnetic coil power methods and apparatus71US 10,295,628 B2Hyperfine Research, Inc. · 2019
- Voltage regulator for generating a constant reference voltage which does not change over time or with change in temperature47US 5,184,061 ASamsung Electronics Co., Ltd. · 1993