H03F 1/34
Negative-feedback-circuit arrangements with or without positive feedback
Official title: Negative-feedback-circuit arrangements with or without positive feedback (H03F1/02 - H03F1/30, H03F1/38 - H03F1/50, H03F3/50 take precedence {; for rejection of common mode signals H03F3/45479})
H03F1/34 (Negative-feedback-circuit arrangements with or without positive feedback) appears on 1,530 US grants and 1,268 published applications in this corpus.
Search patents in H03F- Granted patents
- 1,530
- Published applications
- 1,268
- Assignees
- 635
- Inventors
- 2,568
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 13 | 0 |
| 1978 | 16 | 0 |
| 1979 | 4 | 0 |
| 1980 | 14 | 0 |
| 1981 | 15 | 0 |
| 1982 | 11 | 0 |
| 1983 | 7 | 0 |
| 1984 | 14 | 0 |
| 1985 | 13 | 0 |
| 1986 | 8 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 11 | 0 |
| 1995 | 15 | 0 |
| 1996 | 11 | 0 |
| 1997 | 11 | 0 |
| 1998 | 25 | 0 |
| 1999 | 14 | 0 |
| 2000 | 11 | 0 |
| 2001 | 16 | 6 |
| 2002 | 29 | 18 |
| 2003 | 18 | 23 |
| 2004 | 36 | 39 |
| 2005 | 14 | 54 |
| 2006 | 53 | 84 |
| 2007 | 81 | 93 |
| 2008 | 87 | 62 |
| 2009 | 60 | 61 |
| 2010 | 68 | 57 |
| 2011 | 61 | 49 |
| 2012 | 42 | 41 |
| 2013 | 70 | 50 |
| 2014 | 44 | 56 |
| 2015 | 51 | 42 |
| 2016 | 65 | 63 |
| 2017 | 62 | 58 |
| 2018 | 55 | 50 |
| 2019 | 61 | 60 |
| 2020 | 55 | 60 |
| 2021 | 54 | 46 |
| 2022 | 45 | 53 |
| 2023 | 32 | 40 |
| 2024 | 40 | 40 |
| 2025 | 32 | 39 |
| 2026 | 22 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power detectors with enhanced dynamic range29 Sep 2026US 12,750,076 B2Skyworks Solutions, Inc.
- Pseudo bi-directional amplifier25 Aug 2026US 12,719,423 B2QUALCOMM Incorporated
- Low noise amplifier and receiver using same in wireless communication system18 Aug 2026US 12,712,574 B2Samsung Electronics Co., Ltd.
- Common mode voltage dynamic modulation circuit, method thereof and class-D audio power amplifier4 Aug 2026US 12,700,830 B2Suzhou ACME Semi Co.Ltd.
- Amplifier circuit with two-terminal synthesis resistor as feedback resistor30 Jun 2026US 12,671,381 B2Analog Devices International Unlimited Company
- Zero-common-mode modulation with digital feedback to damp common-mode resonance and suppress cross-over distortion24 Sep 2026US 2026/0291447 A1Monolithic Power Systems, Inc.
- Apparatus and techniques for jammer signal filtering27 Aug 2026US 2026/0254440 A1QUALCOMM Incorporated
- Voltage reference current boost circuit6 Aug 2026US 2026/0230043 A1Texas Instruments Incorporated
- Optical detection device and transceiver device30 Jul 2026US 2026/0222079 A1TDK Corporation
- Power amplifier circuits with dual-polarity2 Jul 2026US 2026/0189190 A1Telefonaktiebolaget LM Ericsson (publ)
Most cited
By later US patents
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- Dual band architectures for mobile stations having transmitter linearization feedback209US 6,125,266 ANokia Mobile Phones Ltd. · 2000
- Dual open and closed loop linear transmitter183US 6,606,483 B1Motorola, Inc. · 2003
- Linearized power amplifier177US 5,420,536 AVictoria University of Technology · 1995
- Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems175US 5,302,914 AAT&T Bell Laboratories · 1994