H03F 3/2178
Using more than one switch or switching amplifier in parallel or in
Official title: {using more than one switch or switching amplifier in parallel or in series (H03F3/2173, H03F3/2175 take precedence)}
H03F3/2178 (Using more than one switch or switching amplifier in parallel or in) appears on 311 US grants and 265 published applications in this corpus.
Search patents in H03F- Granted patents
- 311
- Published applications
- 265
- Assignees
- 166
- Inventors
- 497
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 1 |
| 2002 | 6 | 2 |
| 2003 | 5 | 3 |
| 2004 | 3 | 8 |
| 2005 | 5 | 6 |
| 2006 | 11 | 5 |
| 2007 | 6 | 4 |
| 2008 | 3 | 6 |
| 2009 | 4 | 4 |
| 2010 | 4 | 5 |
| 2011 | 4 | 3 |
| 2012 | 7 | 8 |
| 2013 | 7 | 11 |
| 2014 | 11 | 25 |
| 2015 | 17 | 27 |
| 2016 | 24 | 16 |
| 2017 | 21 | 18 |
| 2018 | 19 | 8 |
| 2019 | 11 | 23 |
| 2020 | 24 | 15 |
| 2021 | 16 | 14 |
| 2022 | 15 | 9 |
| 2023 | 6 | 11 |
| 2024 | 10 | 15 |
| 2025 | 9 | 3 |
| 2026 | 5 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Clipping prevention in switched mode drivers26 May 2026US 12,640,694 B2Cirrus Logic, Inc.
- Generation and synchronization of pulse-width modulated (PWM) waveforms for radio-frequency (RF) applications12 May 2026US 12,627,262 B2Massachusetts Institute of Technology
- Variable gain low noise amplifier and method for controlling gain of variable gain low noise amplifier14 Apr 2026US 12,603,624 B2Mediatek Inc.
- Semiconductor integrated circuit and radio-frequency module7 Apr 2026US 12,597,893 B2Murata Manufacturing Co., Ltd.
- Power spectral shaping for in-band emission control10 Mar 2026US 12,573,988 B2Avago Technologies International Sales Pte. Limited
- Switching amplifiers27 Aug 2026US 2026/0254416 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254417 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254421 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254422 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254423 A1Cirrus Logic International Semiconductor Ltd.
Most cited
By later US patents
- Power waveform synthesis using bilateral devices243US 5,930,128 AEricsson Inc. · 1999
- Class resonant-H electrosurgical generators156US 9,705,456 B2Covidien LP · 2017
- High-efficiency modulation RF amplifier110US 6,377,784 B2Tropian, Inc. · 2002
- Polyphase PDM amplifier92US 4,164,714 AHarris Corporation · 1979
- Modulation amplifier for radio transmitters83US 5,621,351 AThomcast AG · 1997