H03M 3/438
The modulator having a higher order loop filter in the feedforward path
Official title: {the modulator having a higher order loop filter in the feedforward path}
H03M3/438 (The modulator having a higher order loop filter in the feedforward path) appears on 811 US grants and 581 published applications in this corpus.
Search patents in H03M- Granted patents
- 811
- Published applications
- 581
- Assignees
- 319
- Inventors
- 1,192
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 12 | 0 |
| 1992 | 6 | 0 |
| 1993 | 10 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 18 | 0 |
| 1999 | 12 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 3 |
| 2002 | 17 | 12 |
| 2003 | 17 | 11 |
| 2004 | 20 | 18 |
| 2005 | 29 | 28 |
| 2006 | 31 | 22 |
| 2007 | 30 | 33 |
| 2008 | 39 | 34 |
| 2009 | 32 | 24 |
| 2010 | 34 | 30 |
| 2011 | 32 | 28 |
| 2012 | 21 | 27 |
| 2013 | 30 | 25 |
| 2014 | 36 | 24 |
| 2015 | 33 | 27 |
| 2016 | 33 | 27 |
| 2017 | 35 | 18 |
| 2018 | 30 | 15 |
| 2019 | 37 | 40 |
| 2020 | 44 | 25 |
| 2021 | 22 | 20 |
| 2022 | 21 | 26 |
| 2023 | 26 | 24 |
| 2024 | 21 | 20 |
| 2025 | 19 | 13 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03M 3/454With distributed feedback, i.e. with feedback paths from the quantiser output to428
- H03M 3/452With weighted feedforward summation, i.e. with feedforward paths from more than one217
- H03M 3/44With provisions for rendering the modulator inherently stable132
- H03M 3/45With distributed feedforward inputs, i.e. with forward paths from the modulator input82
Recent patents
- Second order audio continuous time delta sigma modulator with resonator16 Jun 2026US 12,658,936 B2Skyworks Solutions, Inc.
- Low-latency delta-sigma modulator28 Apr 2026US 12,615,059 B2Texas Instruments Incorporated
- Signal amplifying circuit and signal processing system and analog-to-digital converting system comprising the same14 Apr 2026US 12,603,618 B2Realtek Semiconductor Corp.
- Apparatus and method for sigma-delta modulator quantization noise cancellation10 Mar 2026US 12,574,047 B2Ciena Corporation
- Analog-to-digital converter with instability recovery circuit20 Jan 2026US 12,531,565 B2Texas Instruments Incorporated
- Delta sigma modulator with output controlled feedback current11 Jun 2026US 2026/0163585 A1NXP B. V.
- Ad conversion circuit, photoelectric conversion device, image capturing device, moving body, and method of driving ad conversion circuit16 Apr 2026US 2026/0107078 A1Canon Kabushiki Kaisha
- Micro-power continuous-time delta-sigma analog-to-digital converter for audio applications2 Apr 2026US 2026/0095193 A1Silicon Laboratories Inc.
- Continuous-Time Delta-Sigma Modulator with Capacitive Feed-ins5 Mar 2026US 2026/0066918 A1NXP B. V.
- High-Speed Continuous-Time Delta-Sigma Modulator Including an Amplifier with Limited Gain5 Mar 2026US 2026/0066919 A1NXP B. V.
Most cited
By later US patents
- Method and arrangement for a sigma delta converter for bandpass signals146US 4,857,928 AMotorola, Inc. · 1989
- Sigma-delta analog-to-digital converter with filtration having controlled pole-zero locations, and apparatus therefor113US 5,392,042 AMartin Marietta Corporation · 1995
- Second order Sigma-Delta based analog to digital converter having superior analog components and having a programmable comb filter coupled to the digital signal processor111US 5,408,235 AIntel Corporation · 1995
- Low-delay signal processing based on highly oversampled digital processing100US 7,365,669 B1Cirrus Logic, Inc. · 2008
- CMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converter96US 6,018,262 AYamaha Corporation · 2000