H03F 3/3072
Using darlington transistors
Official title: {using Darlington transistors (H03F3/3074 takes precedence)}
H03F3/3072 (Using darlington transistors) appears on 22 US grants and 8 published applications in this corpus.
Search patents in H03F- Granted patents
- 22
- Published applications
- 8
- Assignees
- 10
- Inventors
- 30
- Latest grant
- 23 Jul 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 1 |
| 2003 | 4 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Controlling a power amplification stage of an audio signal amplifier23 Jul 2019US 10,361,672 B2Entotem Limited
- Controlling a power amplification stage of an audio signal amplifier3 Jul 2018US 10,014,840 B2Entotem Limited
- Low cost high performance power amplifier utilizing two-stage-included local negative feedback with feedback-shifting technology26 Jan 2010US 7,652,531 B2
- Method for double sampling loop negative feedback and double sampling negative feedback amplifier22 Jul 2008US 7,403,068 B2
- Ultra linear high speed operational amplifier output stage21 Sep 2004US 6,794,943 B2Texas Instruments Incorporated
- Controlling a Power Amplification Stage of an Audio Signal Amplifier4 Oct 2018US 2018/0287579 A1Entotem Limited
- Controlling a Power Amplification Stage of an Audio Signal Amplifier31 Aug 2017US 2017/0250665 A1Entotem Limited
- Low Cost High Performance Power Amplifier Utilizing Two-Stage-Included Local Negative Feedback with Feedback-Shifting Technology7 May 2009US 2009/0115528 A1
- Method For Double Sampling Loop Negative Feedback And Double Sampling Negative Feedback Amplifier27 Dec 2007US 2007/0296502 A1
- Ultra linear high speed operational amplifier output stage5 Jun 2003US 2003/0102920 A1Texas Instruments Incorporated
Most cited
By later US patents
- Opto-isolated bias circuit for operating push-pull amplifiers in class A and class AB modes16US 4,752,745 AThreshold Corporation · 1988
- Capacitor structure and circuit facilitating increased frequency stability of integrated circuits12US 3,953,875 AMotorola, Inc. · 1976
- Constant voltage - constant current high fidelity amplifier10US 4,107,619 AThreshold Corporation · 1978
- Protective circuit for transistor amplifier9US 3,992,678 ASony Corporation · 1976
- Optically coupled bias circuit for complementary output circuit and method9US 4,121,168 ABurr-Brown Research Corporation · 1978