H03K 4/50
In which a sawtooth voltage is produced across a capacitor
Official title: in which a sawtooth voltage is produced across a capacitor
H03K4/50 (In which a sawtooth voltage is produced across a capacitor) appears on 465 US grants and 307 published applications in this corpus.
Search patents in H03K- Granted patents
- 465
- Published applications
- 307
- Assignees
- 266
- Inventors
- 816
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 8 | 0 |
| 1982 | 7 | 0 |
| 1983 | 10 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 5 |
| 2003 | 9 | 6 |
| 2004 | 3 | 4 |
| 2005 | 8 | 11 |
| 2006 | 7 | 9 |
| 2007 | 6 | 5 |
| 2008 | 9 | 18 |
| 2009 | 11 | 15 |
| 2010 | 17 | 23 |
| 2011 | 22 | 16 |
| 2012 | 15 | 19 |
| 2013 | 11 | 15 |
| 2014 | 26 | 12 |
| 2015 | 16 | 15 |
| 2016 | 19 | 8 |
| 2017 | 13 | 15 |
| 2018 | 8 | 16 |
| 2019 | 26 | 27 |
| 2020 | 40 | 20 |
| 2021 | 12 | 8 |
| 2022 | 13 | 13 |
| 2023 | 8 | 9 |
| 2024 | 11 | 7 |
| 2025 | 8 | 4 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03K 4/501The starting point of the flyback period being determined by the amplitude306
- H03K 4/56Using a semiconductor device with negative feedback through a capacitor32
- H03K 4/52Using two semiconductor devices so coupled that the input of each one8
- H03K 4/58Boot-strap generators4
- H03K 4/54Using a single semiconductor device with positive feedback through a transformer0
Recent patents
- Ramp circuit7 Apr 2026US 12,597,943 B2ams Sensors Belgium BVBA
- Oscillators having comparators therein with improved common mode variation across a wide range of process-voltage-temperature (PVT) changes11 Nov 2025US 12,470,172 B2Samsung Electronics Co., Ltd.
- Feedback current depended ramp generator for switched mode power supply21 Oct 2025US 12,451,805 B2GLOBALFOUNDRIES U. S. Inc.
- Digital to analog converter26 Aug 2025US 12,401,370 B2STMicroelectronics (Grenoble 2) SAS
- Digitally calibrated sawtooth generator for PWM based buck converters3 Jun 2025US 12,323,150 B2Intel Corporation
- Clock generating mechanism capable of mitigating clock glitches of digital circuit by selecting good/better timing to output received frequency control signal10 Sep 2026US 2026/0269812 A1Pixart Imaging Inc.
- Integrated circuit configured to generate a pulse width modulated signal6 Aug 2026US 2026/0230081 A1STMicroelectronics International N. V.
- Pulse formation device and pulse formation method using the same16 Jul 2026US 2026/0205005 A1Korea Electrotechnology Research Institute
- Ramp generator and image sensing device including the same4 Jun 2026US 2026/0155810 A1SK hynix Inc.
- Smart time control for switching among various phases of a device via a single capacitor28 May 2026US 2026/0149443 A1
Most cited
By later US patents
- Oscillator for generating a varying amplitude feed forward PFC modulation ramp81US 5,592,128 AMicro Linear Corporation · 1997
- Automatic brightness control apparatus76US 4,514,727 ATRW Inc. · 1985
- Temperature and power supply compensation circuit for integrated circuits56US 4,879,505 AAnalog Devices, Inc. · 1989
- Digital-to-time converter46US 4,742,331 AAnalog Devices, Inc. · 1988
- Switched capacitor charge pump and sawtooth oscillator using same40US 5,387,882 AU. S. Philips Corporation · 1995