Microphone assembly with digital feedback loop
US-10880646-B2 · Dec 29, 2020 · US
Charge amplifiers
Charge amplifiers · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F3/70 |
| Official title | Charge amplifiers |
| Display label | Charge amplifiers |
| Total patents | 199 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 13 |
| 2017 | 9 |
| 2018 | 11 |
| 2019 | 11 |
| 2020 | 25 |
| 2021 | 33 |
| 2022 | 22 |
| 2023 | 24 |
| 2024 | 24 |
| 2025 | 13 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Seismocardiography
US-10779770-B2 · Sep 22, 2020 · US
Differential amplifier, pixel circuit and solid-state imaging device
US-2020280694-A1 · Sep 3, 2020 · US
Charge amplifiers that can be implemented in thin film and are useful for imaging systems such as digital breast tomosynthesis with reduced x-ray exposure
US-2020138393-A1 · May 7, 2020 · US
Charge amplifiers that can be implemented in thin film and are useful for imaging systems such as digital breast tomosynthesis with reduced X-ray exposure
US-10575806-B2 · Mar 3, 2020 · US
Applying a positive feedback voltage to an electromechanical sensor utilizing a voltage-to-voltage converter to facilitate a reduction of charge flow in such sensor representing spring softening
US-2020056887-A1 · Feb 20, 2020 · US
MEMS transducer system and associated methods
US-10511923-B2 · Dec 17, 2019 · US
Microphone assembly with digital feedback loop
US-10499150-B2 · Dec 3, 2019 · US
Mems sensor
US-2019356282-A1 · Nov 21, 2019 · US
Offset cancellation device for micro-electromechanical system
US-10473691-B2 · Nov 12, 2019 · US
Interface electronic circuit for a microelectromechanical acoustic transducer and corresponding method
US-2019326867-A1 · Oct 24, 2019 · US
Charge Amplifiers that can be implemented in Thin Film and are useful for imaging systems such as Digital Breast Tomosynthesis with Reduced X-Ray Exposure
US-2019290231-A1 · Sep 26, 2019 · US
Signal processing circuit and system
US-2019294277-A1 · Sep 26, 2019 · US
Capacitance detection circuit, semiconductor device, input device and electronic apparatus including the same, and method of detecting capacitance
US-2019257870-A1 · Aug 22, 2019 · US
Current amplification circuitry and driving method thereof, and fingerprint detection device
US-2019238103-A1 · Aug 1, 2019 · US
Device modifying the impedance value of a reference resistor
US-2019081625-A1 · Mar 14, 2019 · US
Amplifying electronic circuit with reduced start-up time for a signal including quadrature components
US-10177720-B2 · Jan 8, 2019 · US
I-v conversion module
US-2018375481-A1 · Dec 27, 2018 · US
Capacitive image sensing device
US-2018349666-A1 · Dec 6, 2018 · US
Analog front end circuit for use with fingerprint sensor, and device having the same
US-10146985-B2 · Dec 4, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F3/70?
- CPC H03F3/70 is the Cooperative Patent Classification code for “Charge amplifiers.”
- How many patents are filed under CPC H03F3/70 (Charge amplifiers)?
- Our database includes 199 publications tagged with this CPC code.
- Is patent activity under CPC H03F3/70 growing?
- Publication counts under this code: 24 in 2024 vs 13 in 2025 (latest complete years).