H03F 3/38
Dc amplifiers with modulator at input and demodulator at output
Official title: DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)}
H03F3/38 (Dc amplifiers with modulator at input and demodulator at output) appears on 494 US grants and 427 published applications in this corpus.
Search patents in H03F- Granted patents
- 494
- Published applications
- 427
- Assignees
- 265
- Inventors
- 834
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 2 |
| 2003 | 8 | 6 |
| 2004 | 5 | 14 |
| 2005 | 8 | 10 |
| 2006 | 12 | 17 |
| 2007 | 13 | 25 |
| 2008 | 27 | 15 |
| 2009 | 16 | 15 |
| 2010 | 12 | 10 |
| 2011 | 17 | 9 |
| 2012 | 12 | 6 |
| 2013 | 6 | 13 |
| 2014 | 16 | 20 |
| 2015 | 14 | 17 |
| 2016 | 21 | 25 |
| 2017 | 27 | 22 |
| 2018 | 29 | 24 |
| 2019 | 23 | 22 |
| 2020 | 34 | 34 |
| 2021 | 22 | 22 |
| 2022 | 21 | 29 |
| 2023 | 18 | 20 |
| 2024 | 22 | 17 |
| 2025 | 16 | 17 |
| 2026 | 15 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modulator8 Sep 2026US 12,732,144 B2Denso Corporation
- Amplifier circuit25 Aug 2026US 12,719,429 B2Denso Corporation
- Amplifier circuit18 Aug 2026US 12,712,496 B2Sony Semiconductor Solutions Corporation
- Instrumentation amplifier with base current compensator for improved performance11 Aug 2026US 12,706,573 B2Texas Instruments Incorporated
- Chopper circuit for multipath chopper amplifier and corresponding method of chopping14 Jul 2026US 12,683,565 B2NXP B. V.
- Circuit and Method for Operating a Circuit1 Oct 2026US 2026/0303035 A1Delft Semiconductor B.V.
- Multi-paths amplifier circuit1 Oct 2026US 2026/0303042 A1STMicroelectronics International N. V.
- Multipath instrumentation amplifier17 Sep 2026US 2026/0280500 A1Amazing Microelectronic Corp.
- Differential Amplifier Circuit with Distributed Chopper Circuitry Having a Cyclic Rest Phase27 Aug 2026US 2026/0254426 A1Apple Inc.
- Sense amplifier for a physiological sensor and/or other sensors20 Aug 2026US 2026/0240479 A1Inspire Medical Systems, Inc.
Most cited
By later US patents
- Chopper-stabilized instrumentation amplifier197US 7,385,443 B1Medtronic, Inc. · 2008
- Transmitter using input modulation for envelope restoration scheme for linear high-efficiency power amplification120US 6,380,802 B1Ericsson Inc. · 2002
- Notch filter for ripple reduction in chopper stabilized amplifiers120US 7,292,095 B2Texas Instruments Incorporated · 2007
- Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning115US 7,355,470 B2ParkerVision, Inc. · 2008
- Isolation amplifier with precise timing of signals coupled across isolation barrier109US 4,835,486 ABurr-Brown Corporation · 1989