Power supply control apparatus
US-2018358800-A1 · Dec 13, 2018 · US
using an operational amplifier as final control device
using an operational amplifier as final control device · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G05F1/461 |
| Official title | {using an operational amplifier as final control device} |
| Display label | using an operational amplifier as final control device |
| Total patents | 439 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 9 |
| 2017 | 21 |
| 2018 | 39 |
| 2019 | 63 |
| 2020 | 46 |
| 2021 | 45 |
| 2022 | 67 |
| 2023 | 50 |
| 2024 | 41 |
| 2025 | 37 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Current balance circuit and multiphase converter using the same
US-2018321701-A1 · Nov 8, 2018 · US
Trim techniques for voltage reference circuits
US-10120399-B1 · Nov 6, 2018 · US
Linear regulator with real-time frequency compensation function
US-10101758-B2 · Oct 16, 2018 · US
Voltage-to-current converter
US-10095252-B2 · Oct 9, 2018 · US
Band-gap reference circuit
US-10067518-B2 · Sep 4, 2018 · US
Semiconductor device for monitoring a reverse voltage
US-2018231590-A1 · Aug 16, 2018 · US
Low-dropout regulator
US-2018188756-A1 · Jul 5, 2018 · US
Low voltage regulator
US-10013005-B1 · Jul 3, 2018 · US
Linear regulator with real-time frequency compensation function
US-2018164843-A1 · Jun 14, 2018 · US
Voltage regulators with current reduction mode
US-9946276-B2 · Apr 17, 2018 · US
Low-dropout regulator
US-9910451-B2 · Mar 6, 2018 · US
Control system for transitioning a dc-dc voltage converter from a buck operational mode to a safe operational mode
US-2018062520-A1 · Mar 1, 2018 · US
Power supply control
US-2018034417-A1 · Feb 1, 2018 · US
Thermal and power optimization for linear regulator
US-2018014370-A1 · Jan 11, 2018 · US
Regulators with load-insensitive compensations
US-2017371364-A1 · Dec 28, 2017 · US
Voltage regulator
US-2017371365-A1 · Dec 28, 2017 · US
Voltage-to-current converter
US-2017322574-A1 · Nov 9, 2017 · US
Voltage Regulators with Current Reduction Mode
US-2017322573-A1 · Nov 9, 2017 · US
Device having internal voltage generating circuit
US-2017315572-A1 · Nov 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G05F1/461?
- CPC G05F1/461 is the Cooperative Patent Classification code for “using an operational amplifier as final control device.”
- How many patents are filed under CPC G05F1/461 (using an operational amplifier as final control device)?
- Our database includes 439 publications tagged with this CPC code.
- Is patent activity under CPC G05F1/461 growing?
- Publication counts under this code: 41 in 2024 vs 37 in 2025 (latest complete years).