Analog-to-digital converter with auto-zeroing residue amplification circuit
US-11177821-B1 · Nov 16, 2021 · US
DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)}
DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)} · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F3/38 |
| Official title | DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)} |
| Display label | DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)} |
| Total patents | 102 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 8 |
| 2017 | 5 |
| 2018 | 10 |
| 2019 | 10 |
| 2020 | 16 |
| 2021 | 6 |
| 2022 | 11 |
| 2023 | 9 |
| 2024 | 9 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Amplifier Switching Control Systems And Methods
US-2020382063-A1 · Dec 3, 2020 · US
Class d transconductance amplifier
US-2020366252-A1 · Nov 19, 2020 · US
Chopper stabilized amplifier with parallel notch filters
US-10840862-B2 · Nov 17, 2020 · US
Power transistor control signal gating
US-10833589-B2 · Nov 10, 2020 · US
Capacitive loading mode measurement circuit with compensation of measurement errors due to parasitic sensor impedances
US-10797663-B2 · Oct 6, 2020 · US
Class D transconductance amplifier
US-10771020-B1 · Sep 8, 2020 · US
Class d transconductance amplifier
US-2020266771-A1 · Aug 20, 2020 · US
Always on receiver with offset correction for implant to implant communication in an implantable medical system
US-10722724-B2 · Jul 28, 2020 · US
A circuit arrangement and a method for operating a circuit arrangement
US-2020220510-A1 · Jul 9, 2020 · US
Lock-in amplifier, integrated circuit and portable measurement device including the same
US-10698013-B2 · Jun 30, 2020 · US
Sampled Moving Average Notch Filter for Ripple Reduction in Chopper Stabilized Operational Amplifiers
US-2020119697-A1 · Apr 16, 2020 · US
Chopper stabilized amplifier with parallel notch filters
US-2020091880-A1 · Mar 19, 2020 · US
Always on receiver with offset correction for implant to implant communication in an implantable medical system
US-2020078595-A1 · Mar 12, 2020 · US
Non-inverting differential amplifier with configurable common-mode output signal and reduced common-mode gain
US-10587234-B2 · Mar 10, 2020 · US
Differential mode converter, and measuring device including differential mode converter
US-2020052588-A1 · Feb 13, 2020 · US
Power transistor control signal gating
US-2020028437-A1 · Jan 23, 2020 · US
Modulator for a digital amplifier
US-10476517-B2 · Nov 12, 2019 · US
Magnetic field sensor's front end and associated mixed signal method for removing chopper's related ripple
US-10444299-B2 · Oct 15, 2019 · US
Amplifier with configurable final output stage
US-10447217-B2 · Oct 15, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F3/38?
- CPC H03F3/38 is the Cooperative Patent Classification code for “DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)}.”
- How many patents are filed under CPC H03F3/38 (DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers {(switched capacitor amplifiers H03F3/005)})?
- Our database includes 102 publications tagged with this CPC code.
- Is patent activity under CPC H03F3/38 growing?
- Publication counts under this code: 9 in 2024 vs 7 in 2025 (latest complete years).