H03K 19/0005
Modifications of input or output impedance
Official title: {Modifications of input or output impedance}
H03K19/0005 (Modifications of input or output impedance) appears on 1,012 US grants and 875 published applications in this corpus.
Search patents in H03K- Granted patents
- 1,012
- Published applications
- 875
- Assignees
- 256
- Inventors
- 1,453
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 27 | 0 |
| 2001 | 24 | 6 |
| 2002 | 30 | 12 |
| 2003 | 18 | 15 |
| 2004 | 17 | 26 |
| 2005 | 21 | 18 |
| 2006 | 27 | 33 |
| 2007 | 25 | 37 |
| 2008 | 39 | 50 |
| 2009 | 37 | 58 |
| 2010 | 55 | 38 |
| 2011 | 57 | 33 |
| 2012 | 23 | 27 |
| 2013 | 33 | 37 |
| 2014 | 29 | 37 |
| 2015 | 60 | 56 |
| 2016 | 60 | 46 |
| 2017 | 64 | 52 |
| 2018 | 53 | 31 |
| 2019 | 48 | 39 |
| 2020 | 33 | 31 |
| 2021 | 32 | 33 |
| 2022 | 28 | 32 |
| 2023 | 33 | 29 |
| 2024 | 33 | 49 |
| 2025 | 41 | 30 |
| 2026 | 19 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Semiconductor circuit capable of swapping signal paths and semiconductor apparatus using the same8 Sep 2026US 12,732,189 B2SK hynix Inc.
- Transmission circuit with equalization function and training system including the same25 Aug 2026US 12,719,460 B2SK hynix Inc.
- Impedance calibration for SERDES transmitter driver18 Aug 2026US 12,712,544 B2QUALCOMM Incorproated
- High-speed dynamic-impedance digital CMOS gate drivers for wide band-gap power devices28 Jul 2026US 12,695,451 B2Kinetic Technologies International Holdings LP
- Memory device, integrated circuit device, and operation method of integrated circuit device28 Jul 2026US 12,695,452 B2Samsung Electronics Co., Ltd.
- Dual mode high speed loopback with voltage level shifting and multiplexing1 Oct 2026US 2026/0299015 A1Advanced Micro Devices, Inc.
- Apparatuses and methods for identifying memory devices of a semiconductor device sharing an external resistance24 Sep 2026US 2026/0291501 A1Lodestar Licensing Group LLC
- Semiconductor device, semiconductor system, and method of controlling semiconductor device17 Sep 2026US 2026/0280561 A1Kioxia Corporation
- High-speed dynamic-impedance digital cmos gate drivers for wide band-gap power devices10 Sep 2026US 2026/0269829 A1Kinetic Technologies International Holdings LP
- Zq calibration circuit and memory device including the same20 Aug 2026US 2026/0245602 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Self-adjusting impedance matching driver325US 5,134,311 AInternational Business Machines Corporation · 1992
- Output circuit having transistor monitor for matching output impedance to load impedance204US 4,719,369 AHitachi, Ltd. · 1988
- Binary weighted reference circuit for a variable impedance output buffer172US 5,457,407 ASony Electronics Inc. · 1995
- Impedance control system for a center tapped termination bus164US 6,356,105 B1Intel Corporation · 2002
- System and method for transmission-line termination by signal cancellation, and applications thereof151US 6,937,056 B2Serconet Ltd. · 2005