H03F 3/45551
Measuring at the input circuit of the differential amplifier
Official title: {Measuring at the input circuit of the differential amplifier}
H03F3/45551 (Measuring at the input circuit of the differential amplifier) appears on 52 US grants and 25 published applications in this corpus.
Search patents in H03F- Granted patents
- 52
- Published applications
- 25
- Assignees
- 35
- Inventors
- 75
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 4 |
| 2002 | 5 | 4 |
| 2003 | 6 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 4 |
| 2016 | 3 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 3/4556Controlling the common emitter circuit of the differential amplifier30
- H03F 3/45556Controlling the input circuit of the differential amplifier12
- H03F 3/45565Controlling the active amplifying circuit of the differential amplifier6
- H03F 3/45569Controlling the loading circuit of the differential amplifier6
Recent patents
- Buffer for voltage controlled oscillator (VCO) or other applications11 Feb 2025US 12,224,743 B2QUALCOMM Incorporated
- Differential RF power detector with common mode rejection7 Feb 2023US 11,573,253 B2Apple Inc.
- Photodetector circuit6 Apr 2021US 10,972,058 B2Integrated Device Technology, Inc.
- Bias modulation active linearization for broadband amplifiers24 Nov 2020US 10,848,109 B2Analog Devices, Inc.
- Complementary current reusing preamp for operational amplifier28 May 2019US 10,305,502 B2Texas Instruments Incorporated
- Signal generation circuit6 Aug 2026US 2026/0230042 A1The Ritsumeikan Trust
- Amplifier equalizer and bias offset correction22 Jan 2026US 2026/0025114 A1
- Buffer for voltage controlled oscillator (vco) or other applications18 Jul 2024US 2024/0243744 A1QUALCOMM Incorporated
- Differential RF Power Detector with Common Mode Rejection13 Jan 2022US 2022/0011352 A1Apple Inc.
- Bias modulation active linearization for broadband amplifiers14 Nov 2019US 2019/0348955 A1Analog Devices, Inc.
Most cited
By later US patents
- Differential amplifier with rail-to-rail input capability and controlled transconductance84US 4,555,673 ASignetics Corporation · 1985
- Low voltage differential signal (LVDS) input circuit64US 6,504,403 B2Telefonaktiebolaget LM Ericsson · 2003
- Bootstrapped, AC-coupled differential amplifier55US 5,300,896 A1994
- Method and circuit for trimming an operational amplifier having dual input stages36US 5,610,557 ALinear Technology Corporation · 1997
- Rail-to-rail input stage of an operational amplifier22US 5,153,529 AMotorola, Inc. · 1992