H03D 13/00
Circuits for comparing the phase or frequency of two mutually-independent oscillations
Official title: Circuits for comparing the phase or frequency of two mutually-independent oscillations {(measuring phase G01R25/00; phase-discriminators with yes/no output G01R25/005)}
H03D13/00 (Circuits for comparing the phase or frequency of two mutually-independent oscillations) appears on 713 US grants and 387 published applications in this corpus.
Search patents in H03D- Granted patents
- 713
- Published applications
- 387
- Assignees
- 313
- Inventors
- 1,135
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 10 | 0 |
| 1984 | 10 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 15 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 14 | 0 |
| 1993 | 12 | 0 |
| 1994 | 18 | 0 |
| 1995 | 9 | 0 |
| 1996 | 22 | 0 |
| 1997 | 23 | 0 |
| 1998 | 17 | 0 |
| 1999 | 17 | 0 |
| 2000 | 28 | 0 |
| 2001 | 29 | 9 |
| 2002 | 23 | 28 |
| 2003 | 33 | 38 |
| 2004 | 34 | 33 |
| 2005 | 34 | 37 |
| 2006 | 41 | 50 |
| 2007 | 31 | 34 |
| 2008 | 32 | 33 |
| 2009 | 30 | 20 |
| 2010 | 40 | 11 |
| 2011 | 23 | 15 |
| 2012 | 14 | 15 |
| 2013 | 16 | 8 |
| 2014 | 8 | 6 |
| 2015 | 13 | 6 |
| 2016 | 9 | 10 |
| 2017 | 9 | 4 |
| 2018 | 2 | 5 |
| 2019 | 6 | 4 |
| 2020 | 7 | 6 |
| 2021 | 4 | 0 |
| 2022 | 0 | 4 |
| 2023 | 3 | 4 |
| 2024 | 3 | 4 |
| 2025 | 3 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03D 13/003In which both oscillations are converted by logic means into pulses which460
- H03D 13/001In which a pulse counter is used followed by a conversion into65
- H03D 13/007Circuits for comparing the phase or frequency of two mutually-independent oscillations: by52
- H03D 13/005In which one of the oscillations is, or is converted into, a39
Recent patents
- Frequency correction loop with deadzone and hysteresis16 Jun 2026US 12,658,927 B2Renesas Electronics America Inc.
- Oscillator monitoring circuits for different oscillator domains31 Mar 2026US 12,592,703 B2Allegro MicroSystems, LLC
- Electronic circuit for delivering signals in quadrature11 Nov 2025US 12,470,447 B2STMicroelectronics France
- Systems and methods for phase locked loop realignment with skew cancellation22 Jul 2025US 12,368,444 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Low power quadrature phase detector28 Jan 2025US 12,212,325 B2Mediatek Inc.
- Frequency correction loop with deadzone and hysteresis19 Feb 2026US 2026/0051893 A1Renesas Electronics America Inc.
- Systems and Methods for Phase Locked Loop Realignment With Skew Cancellation16 Oct 2025US 2025/0323649 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Phase frequency detector and its method of operation11 Sep 2025US 2025/0286541 A1Indian Institute of Technology Ropar
- Oscillator monitoring circuits for different oscillator domains31 Oct 2024US 2024/0364353 A1Allegro MicroSystems, LLC
- Electronic circuit for delivering signals in quadrature11 Jul 2024US 2024/0235907 A9STMicroelectronics France
Most cited
By later US patents
- Pulse count generator for wide range digital phase detector130US 3,989,931 ARockwell International Corporation · 1976
- Oscillator comprising foldover detection122US 7,733,189 B1Western Digital Technologies, Inc. · 2010
- Digital variable in-lock range phase comparator119US 5,619,148 AAdvanced Micro Devices, Inc. · 1997
- Digital phase/frequency detector, and clock generator and data recovery PLL containing the same118US 6,683,930 B1Cypress Semiconductor Corporation · 2004
- Method for shaping a pulse width and circuit therefor117US 5,892,380 AMotorola, Inc. · 1999