H03C 3/0933
Using fractional frequency division in the feedback loop of the phase locked
Official title: {using fractional frequency division in the feedback loop of the phase locked loop}
H03C3/0933 (Using fractional frequency division in the feedback loop of the phase locked) appears on 232 US grants and 151 published applications in this corpus.
Search patents in H03C- Granted patents
- 232
- Published applications
- 151
- Assignees
- 117
- Inventors
- 389
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 3 |
| 2003 | 3 | 6 |
| 2004 | 13 | 17 |
| 2005 | 6 | 21 |
| 2006 | 17 | 12 |
| 2007 | 14 | 16 |
| 2008 | 17 | 17 |
| 2009 | 19 | 13 |
| 2010 | 14 | 8 |
| 2011 | 17 | 1 |
| 2012 | 4 | 3 |
| 2013 | 8 | 3 |
| 2014 | 5 | 1 |
| 2015 | 2 | 1 |
| 2016 | 3 | 6 |
| 2017 | 4 | 3 |
| 2018 | 3 | 5 |
| 2019 | 7 | 2 |
| 2020 | 7 | 4 |
| 2021 | 3 | 0 |
| 2022 | 2 | 3 |
| 2023 | 1 | 2 |
| 2024 | 2 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Phase-locked loop, radar system and method for randomizing initial phases of FMCW signals12 May 2026US 12,625,245 B2Calterah Semiconductor Technology (Shanghai) Co., Ltd.
- Partial-fractional phase-locked loop with sigma delta modulator and finite impulse response filter19 Aug 2025US 12,395,178 B2
- Type-I PLLs for phase-controlled applications18 Feb 2025US 12,231,136 B2NXP B. V.
- Partial-fractional phase-locked loop with sigma delta modulator and finite impulse response filter9 Apr 2024US 11,955,979 B2
- Hybrid fractional-N sampling phase locked loop (PLL) with accurate digital-to-time converter (DTC) calibration13 Feb 2024US 11,901,906 B1Cisco Technology, Inc.
- Partial-Fractional Phase-locked Loop with Sigma Delta Modulator and Finite Impulse Response Filter20 Nov 2025US 2025/0357935 A1Apple Inc.
- Phase-locked loop, radar system and method for randomizing initial phases of fmcw signals16 May 2024US 2024/0162908 A1Calterah Semiconductor Technology (Shanghai) Co., Ltd.
- Hybrid fractional-n sampling phase locked loop (pll) with accurate digital-to-time converter (dtc) calibration15 Feb 2024US 2024/0056085 A1Cisco Technology, Inc.
- Partial-Fractional Phase-locked Loop with Sigma Delta Modulator and Finite Impulse Response Filter14 Dec 2023US 2023/0403013 A1Apple Inc.
- Partial-Fractional Phase-locked Loop with Sigma Delta Modulator and Finite Impulse Response Filter14 Dec 2023US 2023/0403014 A1Apple Inc.
Most cited
By later US patents
- Digital compensation for wideband modulation of a phase locked loop frequency synthesizer313US 6,008,703 AMassachusetts Institute of Technology · 1999
- RF transmitter with extended efficient power control range171US 6,681,101 B1Skyworks Solutions, Inc. · 2004
- Frequency synthesizer systems and methods for three-point modulation with a DC response147US 5,834,987 AErcisson Inc. · 1998
- Spread spectrum at phase lock loop (PLL) feedback path117US 6,377,646 B1Cypress Semiconductor Corporation · 2002
- Multiaccumulator sigma-delta fractional-N synthesis103US 5,055,802 AMotorola, Inc. · 1991