H03K 5/1536
Zero-crossing detectors
Official title: Zero-crossing detectors (in measuring circuits G01R19/175)
H03K5/1536 (Zero-crossing detectors) appears on 175 US grants and 115 published applications in this corpus.
Search patents in H03K- Granted patents
- 175
- Published applications
- 115
- Assignees
- 141
- Inventors
- 321
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 3 | 4 |
| 2009 | 2 | 2 |
| 2010 | 1 | 3 |
| 2011 | 4 | 3 |
| 2012 | 1 | 5 |
| 2013 | 5 | 7 |
| 2014 | 11 | 8 |
| 2015 | 4 | 9 |
| 2016 | 9 | 6 |
| 2017 | 12 | 13 |
| 2018 | 11 | 8 |
| 2019 | 10 | 6 |
| 2020 | 8 | 6 |
| 2021 | 4 | 3 |
| 2022 | 5 | 4 |
| 2023 | 10 | 9 |
| 2024 | 4 | 5 |
| 2025 | 8 | 5 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Zero-crossing detection circuit23 Jun 2026US 12,663,447 B2Rohm Co., Ltd.
- Zero current detection circuit and boost type power converter employing the same21 Apr 2026US 12,609,613 B2Research & Business Foundation Sungkyunkwan University
- Zero-current turn-off driver with safety turn-off functionality10 Mar 2026US 12,574,021 B2Infineon Technologies Austria AG
- Station device on which cleaner is docked and operating method of station device10 Feb 2026US 12,543,909 B2Samsung Electronics Co., Ltd.
- Clock signal monitoring unit10 Feb 2026US 12,547,206 B2NXP B. V.
- Zero-crossing detection circuit24 Sep 2026US 2026/0287626 A1Rohm Co., Ltd.
- Manufacturing method, pulse detector, and x ray photoelectron spectroscopy apparatus23 Apr 2026US 2026/0113024 A1Shimadzu Corporation
- Apparatus and Method for Multi-Phase Power Converter in Light Load Operating Mode9 Apr 2026US 2026/0100649 A1Xi An M3 Semiconductor Corporation
- Zero current detection circuit and boost type power converter employing the same15 May 2025US 2025/0158522 A1Research & Business Foundation Sungkyunkwan University
- System and method for zero-voltage detection in resonant pole inverters27 Mar 2025US 2025/0105759 A1ABB Schweiz AG
Most cited
By later US patents
- Zero crossing AC relay control circuit58US 4,051,394 AThe Boeing Company · 1977
- Zero crossing circuit for a relay48US 5,640,113 AThe Watt Stopper, Inc. · 1997
- Zero crossing circuit for a relay47US 5,804,991 AThe Watt Stopper, Inc. · 1998
- Signal repetition-rate and frequency-drift estimator using proportional-delayed zero-crossing techniques39US 7,184,937 B1The United States of America as represented by the Secretary of the Army · 2007
- Zero crossover detector33US 3,944,936 ARCA Corporation · 1976