H03F 3/70
Charge amplifiers
H03F3/70 (Charge amplifiers) appears on 185 US grants and 156 published applications in this corpus.
Search patents in H03F- Granted patents
- 185
- Published applications
- 156
- Assignees
- 132
- Inventors
- 349
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 4 | 1 |
| 2004 | 2 | 5 |
| 2005 | 3 | 3 |
| 2006 | 3 | 8 |
| 2007 | 2 | 3 |
| 2008 | 6 | 3 |
| 2009 | 3 | 4 |
| 2010 | 1 | 4 |
| 2011 | 5 | 2 |
| 2012 | 3 | 2 |
| 2013 | 3 | 2 |
| 2014 | 3 | 4 |
| 2015 | 3 | 6 |
| 2016 | 7 | 7 |
| 2017 | 6 | 3 |
| 2018 | 2 | 6 |
| 2019 | 5 | 7 |
| 2020 | 9 | 18 |
| 2021 | 17 | 20 |
| 2022 | 16 | 11 |
| 2023 | 15 | 13 |
| 2024 | 16 | 12 |
| 2025 | 9 | 4 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Applying a positive feedback voltage to an electromechanical sensor utilizing a voltage-to-voltage converter to facilitate a reduction of charge flow in such sensor representing spring softening9 Jun 2026US 12,650,441 B2InvenSense, Inc.
- Piezoelectric measuring device and method of operating the measuring device19 May 2026US 12,631,509 B2Kistler Holding AG
- Switching amplifier7 Apr 2026US 12,597,899 B2Sony Semiconductor Solutions Corporation
- Analog front-end architecture for capacitive pressure sensor24 Feb 2026US 12,562,702 B2Robert Bosch GmbH
- Offset voltage cancelation for a charge amplification circuit10 Feb 2026US 12,549,145 B2STMicroelectronics International N. V.
- Amplifier device2 Jul 2026US 2026/0189193 A1RichWave Technology Corp.
- Charge amplifier circuit for a capacitive sensing arrangement11 Jun 2026US 2026/0163541 A1EM Microelectronic-Marin SA
- Floating inverter amplifier based on capacitor stacking and application thereof14 May 2026US 2026/0135519 A1Zhejiang University
- Voltage detection circuit23 Apr 2026US 2026/0110714 A1Denso Corporation
- Amplifier circuit for broadband and low-noise amplification of a capacitive current source and a sensor system19 Mar 2026US 2026/0081564 A1
Most cited
By later US patents
- High sensitivity, high resolution detection of signals163US 7,085,502 B2Amplification Technologies, Corp. · 2006
- Differential charge amplifier for marine seismic applications137US 3,939,468 AWhitehall Corporation · 1976
- Microelectromechanical gyroscope with position control driving and method for controlling a microelectromechanical gyroscope67US 8,375,789 B2STMicroelectronics S,r.l. · 2013
- Integrated implementation of a collector boost scheme and method therefor64US 7,348,847 B2SiGe Semiconductor Inc. · 2008
- Noise reduction for photodiode arrays52US 4,902,886 AHewlett-Packard Company · 1990