H03F 1/00
Details of amplifiers with only discharge tubes, only semiconductor devices or only
Official title: Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
H03F1/00 (Details of amplifiers with only discharge tubes, only semiconductor devices or only) appears on 20,443 US grants and 18,525 published applications in this corpus.
Search patents in H03F- Granted patents
- 20,443
- Published applications
- 18,525
- Assignees
- 3,173
- Inventors
- 22,513
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 100 | 0 |
| 1977 | 77 | 0 |
| 1978 | 70 | 0 |
| 1979 | 45 | 0 |
| 1980 | 66 | 0 |
| 1981 | 84 | 0 |
| 1982 | 96 | 0 |
| 1983 | 82 | 0 |
| 1984 | 125 | 0 |
| 1985 | 120 | 0 |
| 1986 | 108 | 0 |
| 1987 | 81 | 0 |
| 1988 | 107 | 0 |
| 1989 | 101 | 0 |
| 1990 | 105 | 0 |
| 1991 | 144 | 0 |
| 1992 | 135 | 0 |
| 1993 | 107 | 0 |
| 1994 | 142 | 0 |
| 1995 | 163 | 0 |
| 1996 | 184 | 0 |
| 1997 | 164 | 0 |
| 1998 | 207 | 0 |
| 1999 | 268 | 0 |
| 2000 | 286 | 0 |
| 2001 | 304 | 92 |
| 2002 | 345 | 387 |
| 2003 | 381 | 410 |
| 2004 | 447 | 503 |
| 2005 | 371 | 635 |
| 2006 | 569 | 640 |
| 2007 | 547 | 710 |
| 2008 | 608 | 714 |
| 2009 | 586 | 588 |
| 2010 | 654 | 635 |
| 2011 | 627 | 571 |
| 2012 | 633 | 679 |
| 2013 | 719 | 724 |
| 2014 | 757 | 816 |
| 2015 | 849 | 891 |
| 2016 | 928 | 882 |
| 2017 | 1009 | 825 |
| 2018 | 893 | 889 |
| 2019 | 1007 | 875 |
| 2020 | 903 | 1035 |
| 2021 | 792 | 895 |
| 2022 | 753 | 863 |
| 2023 | 642 | 900 |
| 2024 | 643 | 966 |
| 2025 | 753 | 769 |
| 2026 | 556 | 631 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 1/02Modifications of amplifiers to raise the efficiency7,916
- H03F 1/32Modifications of amplifiers to reduce non-linear distortion5,869
- H03F 1/56Modifications of input or output impedances, not otherwise provided for3,640
- H03F 1/30Modifications of amplifiers to reduce influence of variations of temperature or supply3,291
- H03F 1/08Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying2,968
- H03F 1/52Circuit arrangements for protecting such amplifiers1,534
- H03F 1/34Negative-feedback-circuit arrangements with or without positive feedback1,530
- H03F 1/26Modifications of amplifiers to reduce influence of noise generated by amplifying elements1,290
Recent patents
- Data storage device with BiCMOS impedance-matched amplifier with transducer-bias6 Oct 2026US 12,755,754 B1Western Digital Technologies, Inc.
- Power amplifier6 Oct 2026US 12,756,362 B2Himax Technologies Limited
- Doherty amplifier system6 Oct 2026US 12,756,363 B2Qorvo US, Inc.
- Gyroscope quadrature cancellation6 Oct 2026US 12,756,364 B2InvenSense, Inc.
- Method and apparatus for controlling second harmonic-of power amplifier in wide frequency range6 Oct 2026US 12,756,365 B2Avago Technologies International Sales Pte. Limited
- Audio envelope tracking for controlling a tracking power supply8 Oct 2026US 2026/0312540 A1Harman Becker Automotive Systems GmbH
- High-frequency power supply device8 Oct 2026US 2026/0312541 A1Kyosan Electric Mfg. Co., Ltd.
- Multistage amplifier8 Oct 2026US 2026/0312542 A1NTT, Inc.
- Doherty power amplifiers with controllable capacitor for tuning harmonic termination and inverter8 Oct 2026US 2026/0312543 A1Skyworks Solutions, Inc.
- Power protection loop for amplifier chain elements8 Oct 2026US 2026/0312544 A1Qorvo US, Inc.
Most cited
By later US patents
- Electronic device having sound output module1,021US 7,046,082 B2Rohm Co., Ltd. · 2006
- Electrosurgical generator with high-frequency pulse width modulated feedback power control434US 4,727,874 AC. R. Bard, Inc. · 1988
- Non-linear adaptive AM/AM and AM/PM pre-distortion compensation with time and temperature compensation for low power applications412US 7,215,716 B12007
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- Active cancellation of transmitter leakage in a wireless transceiver363US 8,175,535 B2Telefonaktiebolaget LM Ericsson (publ) · 2012