H03K 21/00
Details of pulse counters or frequency dividers
H03K21/00 (Details of pulse counters or frequency dividers) appears on 1,372 US grants and 991 published applications in this corpus.
Search patents in H03K- Granted patents
- 1,372
- Published applications
- 991
- Assignees
- 563
- Inventors
- 2,382
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 38 | 0 |
| 1977 | 26 | 0 |
| 1978 | 28 | 0 |
| 1979 | 19 | 0 |
| 1980 | 17 | 0 |
| 1981 | 13 | 0 |
| 1982 | 14 | 0 |
| 1983 | 10 | 0 |
| 1984 | 14 | 0 |
| 1985 | 18 | 0 |
| 1986 | 8 | 0 |
| 1987 | 12 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 12 | 0 |
| 1992 | 12 | 0 |
| 1993 | 8 | 0 |
| 1994 | 8 | 0 |
| 1995 | 12 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 13 | 1 |
| 2002 | 9 | 9 |
| 2003 | 9 | 16 |
| 2004 | 16 | 18 |
| 2005 | 15 | 13 |
| 2006 | 18 | 14 |
| 2007 | 10 | 19 |
| 2008 | 11 | 22 |
| 2009 | 21 | 18 |
| 2010 | 15 | 18 |
| 2011 | 24 | 31 |
| 2012 | 27 | 61 |
| 2013 | 42 | 52 |
| 2014 | 63 | 47 |
| 2015 | 63 | 66 |
| 2016 | 68 | 50 |
| 2017 | 65 | 44 |
| 2018 | 51 | 67 |
| 2019 | 90 | 82 |
| 2020 | 94 | 71 |
| 2021 | 68 | 56 |
| 2022 | 72 | 54 |
| 2023 | 58 | 49 |
| 2024 | 50 | 43 |
| 2025 | 51 | 39 |
| 2026 | 25 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low-jitter random clock generation circuit8 Sep 2026US 12,732,176 B2Chongqing GigaChip Technology Co., Ltd.
- Delay clock circuit, signal transmission device and a method for determining delay1 Sep 2026US 12,726,185 B2Beijing ESWIN Computing Technology Co., Ltd.
- Method for operating a circuit arrangement and circuit arrangement1 Sep 2026US 12,726,204 B2ams International AG
- Embedded pattern generator25 Aug 2026US 12,719,459 B2Texas Instruments Incorporated
- Real-time clock generation device and real-time clock generation method25 Aug 2026US 12,719,484 B2MegaChips Corporation
- Methods and apparatus to determine a frequency of a signal20 Aug 2026US 2026/0246460 A1Texas Instruments Incorporated
- Timer circuit6 Aug 2026US 2026/0227823 A1STMicroelectronics International N. V.
- Methods and apparatus to dynamically correct time keeping errors6 Aug 2026US 2026/0230078 A1
- Multi-chain radio circuit system, quadrature divider circuit, and synchronization method30 Jul 2026US 2026/0222020 A1Chongqing WuQi Microelectronics Co., Ltd.
- Programmable high-speed frequency divider23 Jul 2026US 2026/0213759 A1STMicroelectronics International N. V.
Most cited
By later US patents
- Look up table implementation of fast carry for adders and counters136US 5,274,581 AAltera Corporation · 1993
- Multiple clock frequency divider with fifty percent duty cycle output133US 5,914,996 AIntel Corporation · 1999
- Dual-injection locked frequency dividing circuit119US 7,656,205 B2National Taiwan University · 2010
- Apparatus with reconfigurable counter includes memory for storing plurality of counter configuration files which respectively define plurality of predetermined counters114US 5,109,503 AGE Fanuc Automation North America, Inc. · 1992
- Calibration methods and circuits for optimized on-die termination101US 6,924,660 B2Rambus Inc. · 2005