Signal processing device
US-11212630-B2 · Dec 28, 2021 · US
in audio amplifiers
in audio amplifiers · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F1/3264 |
| Official title | {in audio amplifiers} |
| Display label | in audio amplifiers |
| Total patents | 117 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 12 |
| 2019 | 7 |
| 2020 | 21 |
| 2021 | 19 |
| 2022 | 15 |
| 2023 | 16 |
| 2024 | 11 |
| 2025 | 5 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Signal processing device
US-2021385598-A1 · Dec 9, 2021 · US
Power limiter configuration for audio signals
US-11171615-B2 · Nov 9, 2021 · US
Hearing device comprising an amplifier system for minimizing variation in an acoustic signal caused by variation in gain of an amplifier
US-2021337321-A1 · Oct 28, 2021 · US
Power limiter configuration for audio signals
US-11146219-B2 · Oct 12, 2021 · US
Common mode voltage controller for self-boosting push pull amplifier
US-2021305952-A1 · Sep 30, 2021 · US
Hearing device comprising an amplifier system for minimizing variation in an acoustical signal caused by variation in gain of an amplifier
US-11082776-B2 · Aug 3, 2021 · US
Audio power source with improved efficiency
US-2021167744-A1 · Jun 3, 2021 · US
Signal processing device
US-2021136506-A1 · May 6, 2021 · US
Avoiding clipping in audio power delivery by predicting available power supply energy
US-10998867-B2 · May 4, 2021 · US
Methods and apparatus for an amplifier circuit
US-10951181-B2 · Mar 16, 2021 · US
Power Limiter Configuration for Audio Signals
US-2021050823-A1 · Feb 18, 2021 · US
Audio codec circuit and method for processing audio data
US-2021013845-A1 · Jan 14, 2021 · US
Method for changing audio limiter settings under low alternating-current (ac) line voltage condition
US-2020382008-A1 · Dec 3, 2020 · US
Avoiding clipping in audio power delivery by predicting available power supply energy
US-2020382078-A1 · Dec 3, 2020 · US
Method for changing audio limiter settings under low alternating-current (AC) line voltage condition
US-10855237-B1 · Dec 1, 2020 · US
Power limiter configuration for audio signals
US-10826441-B2 · Nov 3, 2020 · US
Amplifier offset cancellation using amplifier supply voltage
US-10797651-B2 · Oct 6, 2020 · US
Power Limiter Configuration for Audio Signals
US-2020252723-A1 · Aug 6, 2020 · US
Power Limiter Configuration for Audio Signals
US-2020252033-A1 · Aug 6, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F1/3264?
- CPC H03F1/3264 is the Cooperative Patent Classification code for “in audio amplifiers.”
- How many patents are filed under CPC H03F1/3264 (in audio amplifiers)?
- Our database includes 117 publications tagged with this CPC code.
- Is patent activity under CPC H03F1/3264 growing?
- Publication counts under this code: 11 in 2024 vs 5 in 2025 (latest complete years).