Chopper system and method
US-2021344315-A1 · Nov 4, 2021 · US
Ripple reduction circuitry being used in an amplifying circuit
Ripple reduction circuitry being used in an amplifying circuit · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F2200/459 |
| Official title | Ripple reduction circuitry being used in an amplifying circuit |
| Display label | Ripple reduction circuitry being used in an amplifying circuit |
| Total patents | 96 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 6 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 8 |
| 2020 | 15 |
| 2021 | 10 |
| 2022 | 10 |
| 2023 | 5 |
| 2024 | 7 |
| 2025 | 10 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Signal amplifier circuit having high power supply rejection ratio and driving circuit thereof
US-11146217-B2 · Oct 12, 2021 · US
Signal amplification structure and communication device
US-11043927-B2 · Jun 22, 2021 · US
Capacitively coupled continuous-time delta-sigma modulator and operation method thereof
US-11025269-B2 · Jun 1, 2021 · US
High input impedance, high dynamic range, common-mode-interferer tolerant sensing front-end for neuromodulation systems
US-11025215-B2 · Jun 1, 2021 · US
Outphasing power combiner
US-10938347-B2 · Mar 2, 2021 · US
Chopper amplifier
US-10931247-B2 · Feb 23, 2021 · US
Sampled moving average notch filter for ripple reduction in chopper stabilized operational amplifiers
US-10911004-B2 · Feb 2, 2021 · US
Signal amplifier circuit having high power supply rejection ratio and driving circuit thereof
US-2021028747-A1 · Jan 28, 2021 · US
Capacitive-coupled chopper instrumentation amplifiers and associated methods
US-2020412308-A1 · Dec 31, 2020 · US
Radio frequency power amplifier for inhibiting harmonic wave and stray, chip and communication terminal
US-10879850-B2 · Dec 29, 2020 · US
Outphasing power combiner
US-2020403573-A1 · Dec 24, 2020 · US
Capacitively coupled continuous-time delta-sigma modulator and operation method thereof
US-2020366311-A1 · Nov 19, 2020 · US
Chopper stabilized amplifier with parallel notch filters
US-10840862-B2 · Nov 17, 2020 · US
Amplifying device comprising a compensation circuit
US-10797654-B2 · Oct 6, 2020 · US
Capacitive-coupled chopper instrumentation amplifiers and associated methods
US-10797661-B2 · Oct 6, 2020 · US
High dynamic range sensing front-end for neural signal recording systems
US-10778165-B2 · Sep 15, 2020 · US
Radio frequency power amplifier for inhibiting harmonic wave and stray, chip and communication terminal
US-2020186099-A1 · Jun 11, 2020 · US
Closed-loop digital compensation scheme
US-10651801-B2 · May 12, 2020 · US
Capacitively coupled chopper amplifier
US-10630245-B2 · Apr 21, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F2200/459?
- CPC H03F2200/459 is the Cooperative Patent Classification code for “Ripple reduction circuitry being used in an amplifying circuit.”
- How many patents are filed under CPC H03F2200/459 (Ripple reduction circuitry being used in an amplifying circuit)?
- Our database includes 96 publications tagged with this CPC code.
- Is patent activity under CPC H03F2200/459 growing?
- Publication counts under this code: 7 in 2024 vs 10 in 2025 (latest complete years).