H04L 27/38
Demodulator circuits
Official title: Demodulator circuits; Receiver circuits
H04L27/38 (Demodulator circuits) appears on 2,509 US grants and 2,108 published applications in this corpus.
Search patents in H04L- Granted patents
- 2,509
- Published applications
- 2,108
- Assignees
- 740
- Inventors
- 3,943
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 14 | 0 |
| 1986 | 20 | 0 |
| 1987 | 11 | 0 |
| 1988 | 17 | 0 |
| 1989 | 17 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 12 | 0 |
| 1993 | 4 | 0 |
| 1994 | 10 | 0 |
| 1995 | 12 | 0 |
| 1996 | 22 | 0 |
| 1997 | 41 | 0 |
| 1998 | 47 | 0 |
| 1999 | 41 | 0 |
| 2000 | 38 | 0 |
| 2001 | 32 | 8 |
| 2002 | 25 | 35 |
| 2003 | 31 | 45 |
| 2004 | 39 | 70 |
| 2005 | 31 | 68 |
| 2006 | 51 | 51 |
| 2007 | 65 | 72 |
| 2008 | 53 | 100 |
| 2009 | 61 | 91 |
| 2010 | 77 | 89 |
| 2011 | 96 | 88 |
| 2012 | 104 | 83 |
| 2013 | 129 | 104 |
| 2014 | 153 | 148 |
| 2015 | 189 | 144 |
| 2016 | 132 | 112 |
| 2017 | 118 | 118 |
| 2018 | 118 | 100 |
| 2019 | 108 | 119 |
| 2020 | 142 | 123 |
| 2021 | 96 | 71 |
| 2022 | 67 | 66 |
| 2023 | 76 | 72 |
| 2024 | 67 | 64 |
| 2025 | 57 | 42 |
| 2026 | 28 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04L 27/3845Using non - coherent demodulation, i.e. not using a phase synchronous carrier757
- H04L 27/3818Using coherent demodulation, i.e. using one or more nominally phase synchronous carriers366
- H04L 27/3809Amplitude regulation arrangements276
- H04L 27/389With separate demodulation for the phase and amplitude components84
Recent patents
- Apparatus for transmitting and receiving signal29 Sep 2026US 12,750,161 B2Samsung Electronics Co., Ltd.
- Pairing modulation8 Sep 2026US 12,732,403 B2Vestel Elektronik Sanayi Ve Ticaret A.S.
- Communication method and apparatus in high-frequency scenario8 Sep 2026US 12,732,409 B2Huawei Technologies Co., Ltd.
- Wireless communication device and method for IQ calibration1 Sep 2026US 12,726,395 B2TP-Link Systems Inc.
- Embedded constellation25 Aug 2026US 12,719,731 B2QUALCOMM Incorproated
- Differential phase shift keying demodulator8 Oct 2026US 2026/0312694 A1BAE Systems Information and Electronic Systems Integration Inc.
- Method and apparatus for communication of signals1 Oct 2026US 2026/0303433 A1QUANTUMSINE OPERATING Pte Ltd
- Method and apparatus for communication of signals1 Oct 2026US 2026/0303434 A1QUANTUMSINE OPERATING Pte Ltd
- Communication method, communication system, transmitter, and receiver24 Sep 2026US 2026/0291802 A1Hitachi, Ltd.
- Apparatus and method for bidirectional vector modulating27 Aug 2026US 2026/0254704 A1Foundation of Soongsil University-Industry Cooperation
Most cited
By later US patents
- Apparatus and method for digital data transmission using orthogonal codes473US 6,356,555 B1Terayon Communications Systems, Inc. · 2002
- Data communication system and method therefor203US 6,005,897 A1999
- Method and system for down-converting electromagnetic signals185US 6,061,551 AParkerVision, Inc. · 2000
- Pragmatic trellis-coded modulation system and method therefor184US 6,097,764 ASicom, Inc. · 2000
- Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal173US 5,966,412 AThomson Consumer Electronics, Inc. · 1999