Built-in self-test system and method for crystal oscillator amplifier
US-12546813-B2 · Feb 10, 2026 · US
the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range
the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03B2201/031 |
| Official title | the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range |
| Display label | the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range |
| Total patents | 54 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 6 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oscillator regulation
US-12362705-B2 · Jul 15, 2025 · US
Built-in self-test system and method for crystal oscillator amplifier
US-2025180631-A1 · Jun 5, 2025 · US
Amplitude regulator for crystal oscillator
US-12255584-B2 · Mar 18, 2025 · US
Oscillator frequency accuracy and amplitude control
US-12206361-B2 · Jan 21, 2025 · US
Architecture for reduction of rf interference on clock circuits
US-2025007501-A1 · Jan 2, 2025 · US
Oscillation circuit, oscillator, electronic apparatus and moving object
US-RE50256-E · Dec 31, 2024 · US
Amplitude regulator for crystal oscillator
US-12184233-B2 · Dec 31, 2024 · US
Rc time based locked voltage controlled oscillator
US-12095420-B2 · Sep 17, 2024 · US
Oscillator regulation
US-2024267000-A1 · Aug 8, 2024 · US
Low-noise oscillator amplitude regulator
US-11942952-B2 · Mar 26, 2024 · US
Amplitude regulator for crystal oscillator
US-2024022210-A1 · Jan 18, 2024 · US
Amplitude regulator for crystal oscillator
US-2023421100-A1 · Dec 28, 2023 · US
Rc time based locked voltage controlled oscillator
US-2023299718-A1 · Sep 21, 2023 · US
Oscillator frequency accuracy and amplitude control
US-2023188093-A1 · Jun 15, 2023 · US
RC time based locked voltage controlled oscillator
US-11677354-B2 · Jun 13, 2023 · US
Low-Noise Oscillator Amplitude Regulator
US-2023134987-A1 · May 4, 2023 · US
Low-noise oscillator amplitude regulator
US-11552641-B2 · Jan 10, 2023 · US
Timing circuit for locking a voltage controlled oscillator to a high frequency by use of low frequency quotients and resistor to switched capacitor matching
US-11539328-B2 · Dec 27, 2022 · US
Oscillator circuit with two current supplies
US-11336230-B2 · May 17, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03B2201/031?
- CPC H03B2201/031 is the Cooperative Patent Classification code for “the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range.”
- How many patents are filed under CPC H03B2201/031 (the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range)?
- Our database includes 54 publications tagged with this CPC code.
- Is patent activity under CPC H03B2201/031 growing?
- Publication counts under this code: 6 in 2024 vs 5 in 2025 (latest complete years).