Apparatus and methods for a capacitive digital-to-analog converter based power amplifier
US-9525383-B2 · Dec 20, 2016 · US
using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence)
using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F3/2175 |
| Official title | {using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence)} |
| Display label | using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence) |
| Total patents | 467 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 40 |
| 2016 | 45 |
| 2017 | 42 |
| 2018 | 44 |
| 2019 | 55 |
| 2020 | 62 |
| 2021 | 42 |
| 2022 | 41 |
| 2023 | 36 |
| 2024 | 20 |
| 2025 | 31 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multiple-state, switch-mode power amplifier systems and methods of their operation
US-9515623-B2 · Dec 6, 2016 · US
Class-D amplifier
US-9503023-B2 · Nov 22, 2016 · US
Frequency planning for digital power amplifier
US-9490966-B2 · Nov 8, 2016 · US
Audio signal amplification device
US-2016323669-A1 · Nov 3, 2016 · US
Photoconductive semiconductor amplifier and switch
US-9473080-B1 · Oct 18, 2016 · US
Pulse-width modulation generator
US-9431973-B2 · Aug 30, 2016 · US
Apparatus and system for rail-to-rail amplifier
US-2016233833-A1 · Aug 11, 2016 · US
Controller for adjusting a switching frequency in a boost converter
US-9391517-B1 · Jul 12, 2016 · US
Method of operating digital-to-analog processing chains, corresponding device, apparatus and computer program product
US-2016191005-A1 · Jun 30, 2016 · US
Transmitter and method of transmitting
US-2016191294-A1 · Jun 30, 2016 · US
Devices and methods for converting digital signals
US-9362888-B2 · Jun 7, 2016 · US
Sigma-delta modulation apparatus and sigma-delta modulation power amplifier
US-9350578-B2 · May 24, 2016 · US
Class d power driver peripheral
US-2016134239-A1 · May 12, 2016 · US
Power stage with switched mode amplifier and linear amplifier
US-2016126908-A1 · May 5, 2016 · US
Reconfigurable Output Stage
US-2016118892-A1 · Apr 28, 2016 · US
Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator
US-2016118948-A1 · Apr 28, 2016 · US
Frequency Planning for Digital Power Amplifier
US-2016112186-A1 · Apr 21, 2016 · US
Pulse-width modulation generator
US-2016072454-A1 · Mar 10, 2016 · US
Class d amplifier circuit
US-2016065158-A1 · Mar 3, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F3/2175?
- CPC H03F3/2175 is the Cooperative Patent Classification code for “using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence).”
- How many patents are filed under CPC H03F3/2175 (using analogue-digital or digital-analogue conversion (H03F3/2173 takes precedence))?
- Our database includes 467 publications tagged with this CPC code.
- Is patent activity under CPC H03F3/2175 growing?
- Publication counts under this code: 20 in 2024 vs 31 in 2025 (latest complete years).