Multichannel driver circuitry and operation
US-2024322821-A1 · Sep 26, 2024 · US
by using a signal derived from the input signal
by using a signal derived from the input signal · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F1/025 |
| Official title | {by using a signal derived from the input signal} |
| Display label | by using a signal derived from the input signal |
| Total patents | 367 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 37 |
| 2016 | 40 |
| 2017 | 41 |
| 2018 | 42 |
| 2019 | 34 |
| 2020 | 41 |
| 2021 | 18 |
| 2022 | 13 |
| 2023 | 25 |
| 2024 | 33 |
| 2025 | 29 |
| 2026 | 14 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Amplifier circuit and methods of operation thereof
US-2016336850-A1 · Nov 17, 2016 · US
Control of a switched mode power supply and linear power supply for an audio device
US-9484876-B2 · Nov 1, 2016 · US
Amplifier circuit
US-9473098-B2 · Oct 18, 2016 · US
Digital multi-level envelope tracking for wide-bandwidth signals
US-9438172-B2 · Sep 6, 2016 · US
Pseudo-envelope following feedback delay compensation
US-9431974-B2 · Aug 30, 2016 · US
Amplifier dynamic bias adjustment for envelope tracking
US-9413298-B2 · Aug 9, 2016 · US
Output impedance compensation of a pseudo-envelope follower power management system
US-9401678-B2 · Jul 26, 2016 · US
Apparatus and methods for power amplifier output matching
US-9391567-B2 · Jul 12, 2016 · US
Optimization Methods for Amplifier with Variable Supply Power
US-2016190989-A1 · Jun 30, 2016 · US
Amplifier Dynamic Bias Adjustment for Envelope Tracking
US-2016164468-A1 · Jun 9, 2016 · US
Amplifier Dynamic Bias Adjustment for Envelope Tracking
US-2016164469-A1 · Jun 9, 2016 · US
Power supply device for high frequency power amplifying circuit and high frequency power amplifying apparatus
US-9350299-B2 · May 24, 2016 · US
Supply modulation for radio frequency power amplification
US-2016142013-A1 · May 19, 2016 · US
DC-DC converter for envelope tracking
US-9337734-B2 · May 10, 2016 · US
Apparatus and methods for calibration of envelope trackers
US-2016099742-A1 · Apr 7, 2016 · US
Amplifier circuit and methods of operation thereof
US-9306448-B2 · Apr 5, 2016 · US
Apparatus and methods for calibrating envelope trackers
US-9294043-B2 · Mar 22, 2016 · US
Reducing kickback current to power supply during charge pump mode transitions
US-9293986-B2 · Mar 22, 2016 · US
Control systems and methods for power amplifiers operating in envelope tracking mode
US-9287829-B2 · Mar 15, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F1/025?
- CPC H03F1/025 is the Cooperative Patent Classification code for “by using a signal derived from the input signal.”
- How many patents are filed under CPC H03F1/025 (by using a signal derived from the input signal)?
- Our database includes 367 publications tagged with this CPC code.
- Is patent activity under CPC H03F1/025 growing?
- Publication counts under this code: 33 in 2024 vs 29 in 2025 (latest complete years).