H03B 21/02
By plural beating, i.e. for frequency synthesis
Official title: by plural beating, i.e. for frequency synthesis {; Beating in combination with multiplication or division of frequency (digital frequency synthesis using a ROM G06F1/02; digital frequency synthesis in general H03K; indirect frequency synthesis using a PLL H03L7/16)}
H03B21/02 (By plural beating, i.e. for frequency synthesis) appears on 175 US grants and 97 published applications in this corpus.
Search patents in H03B- Granted patents
- 175
- Published applications
- 97
- Assignees
- 124
- Inventors
- 304
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 3 |
| 2002 | 4 | 10 |
| 2003 | 6 | 2 |
| 2004 | 9 | 7 |
| 2005 | 6 | 8 |
| 2006 | 5 | 4 |
| 2007 | 5 | 7 |
| 2008 | 2 | 6 |
| 2009 | 6 | 7 |
| 2010 | 10 | 4 |
| 2011 | 2 | 2 |
| 2012 | 4 | 1 |
| 2013 | 4 | 6 |
| 2014 | 7 | 7 |
| 2015 | 7 | 1 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 3 |
| 2019 | 2 | 6 |
| 2020 | 9 | 3 |
| 2021 | 2 | 2 |
| 2022 | 3 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 3 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Stable scalable digital frequency reference21 Oct 2025US 12,451,893 B2National Research Council of Canada
- Stable scalable digital frequency reference17 Jun 2025US 12,334,940 B2National Research Council of Canada
- Frequency synthesis system and frequency generation method of microwave photons based on photoelectric synergy6 Aug 2024US 12,057,849 B2China Electronics Technology Group Corporation No 44 Research Institute
- OOK modulation device27 Dec 2022US 11,539,560 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Phase coherent numerically controlled oscillator16 Aug 2022US 11,418,148 B2Texas Instruments Incorporated
- Stable scalable digital frequency reference20 Jun 2024US 2024/0204787 A1National Research Council of Canada
- Stable scalable digital frequency reference23 May 2024US 2024/0171183 A1National Research Council of Canada
- Frequency synthesis system and frequency generation method of microwave photons based on photoelectric synergy11 Apr 2024US 2024/0118136 A1China Electronics Technology Group Corporation No 44 Research Institute
- Stable scalable digital frequency reference15 Dec 2022US 2022/0399896 A1National Research Council of Canada
- Ook modulation device7 Apr 2022US 2022/0109591 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
Most cited
By later US patents
- Direct conversion FM receiver with offset196US 4,944,025 AAT&E Corporation · 1990
- Variable frequency synthesizer with reduced phase noise134US 4,602,220 AAdvantest Corporation · 1986
- Frequency signal generator apparatus and method for simulating interference in mobile communication systems118US 5,220,680 APacTel Corporation · 1993
- Frequency hopping synthesizer using dual gate amplifiers114US 5,661,424 AGTE Laboratories Incorporated · 1997
- Discrete chirp frequency synthesizer86US 4,100,498 AThe United States of America as represented by the Secretary of the Navy · 1978