H03C 3/225
Using field effect transistors
Official title: {using field effect transistors (H03C3/227 takes precedence)}
H03C3/225 (Using field effect transistors) appears on 23 US grants and 15 published applications in this corpus.
Search patents in H03C- Granted patents
- 23
- Published applications
- 15
- Assignees
- 17
- Inventors
- 41
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 3 |
| 2009 | 4 | 3 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-gigabit per second frequency-shift keying (FSK) transceiver28 Apr 2026US 12,615,174 B2The Regents of the University of California
- Ultra-wideband impulse radio transmitter with modulation19 Aug 2014US 8,811,527 B2Agency for Science, Technology and Research
- Dual rail out-phased envelope tracking modulator22 Apr 2014US 8,704,594 B2Auriga Measurement Systems, LLC
- Methods and apparatus for improved phase switching and linearity in an analog phase interpolator19 Apr 2011US 7,928,789 B2Agere Systems Inc.
- Modulation circuit28 Sep 2010US 7,804,375 B2Advantest Corporation
- Multi-gigabit per second frequency-shift keying (fsk) transceiver5 Jun 2025US 2025/0184194 A1The Regents of the University of California
- Transmitter, transceiver circuit, and wireless transmitting and receiving system17 Nov 2016US 2016/0337152 A1Fujitsu Limited
- Transmitter with Modulation24 Jan 2013US 2013/0022086 A1Agency for Science, Technology and Research
- Dual Rail Out-Phased Envelope Tracking Modulator13 Dec 2012US 2012/0313702 A1Auriga Measurement Systems, LLC
- Methods and apparatus for improved phase switching and linearity in an analog phase interpolator30 Apr 2009US 2009/0108898 A1Agere Systems Inc.
Most cited
By later US patents
- MMIC tunable biphase modulator49US 5,442,327 AMotorola, Inc. · 1995
- Programmable radio transceiver30US 7,323,945 B2BitWave Semiconductor, Inc. · 2008
- Programmable radio transceiver26US 7,580,684 B2BitWave Semiconductor, Inc. · 2009
- Voltage-controlled oscillator circuit for direct modulation23US 6,774,736 B1Microtune (San Diego), Inc. · 2004
- Linear gain voltage controlled oscillator with modulation compensation16US 4,510,465 AMotorola, Inc. · 1985