H03B 5/20
Generation of oscillations using amplifier with regenerative feedback from output to input
Official title: with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
H03B5/20 (Generation of oscillations using amplifier with regenerative feedback from output to input) appears on 423 US grants and 306 published applications in this corpus.
Search patents in H03B- Granted patents
- 423
- Published applications
- 306
- Assignees
- 226
- Inventors
- 752
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 8 | 0 |
| 1997 | 7 | 0 |
| 1998 | 11 | 0 |
| 1999 | 2 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 1 |
| 2002 | 9 | 6 |
| 2003 | 9 | 6 |
| 2004 | 7 | 3 |
| 2005 | 2 | 7 |
| 2006 | 6 | 5 |
| 2007 | 4 | 4 |
| 2008 | 4 | 2 |
| 2009 | 4 | 2 |
| 2010 | 1 | 6 |
| 2011 | 1 | 2 |
| 2012 | 4 | 6 |
| 2013 | 7 | 9 |
| 2014 | 12 | 12 |
| 2015 | 9 | 10 |
| 2016 | 30 | 31 |
| 2017 | 20 | 29 |
| 2018 | 15 | 23 |
| 2019 | 24 | 14 |
| 2020 | 31 | 21 |
| 2021 | 17 | 14 |
| 2022 | 20 | 16 |
| 2023 | 20 | 16 |
| 2024 | 13 | 23 |
| 2025 | 20 | 21 |
| 2026 | 15 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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Most cited
By later US patents
- Ring oscillator using even numbers of differential stages with current mirrors131US 5,596,302 ALucent Technologies Inc. · 1997
- Frequency controlled recursive oscillator having sinusoidal output105US 5,204,642 AAdvanced Micro Devices, Inc. · 1993
- Digitally-tuned oscillator including a self-calibrating RC oscillator circuit89US 5,552,748 AAmerican Microsystems, Inc. · 1996
- Controllable multi-phase ring oscillators with variable current sources and capacitances86US 5,302,920 ANCR Corporation · 1994
- Embedded voltage controlled oscillator with minimum sensitivity to process and supply65US 5,847,616 ATritech Microelectronics International, Ltd. · 1998