Impedance transformation circuit for amplifier
US-9825597-B2 · Nov 21, 2017 · US
in field-effect transistor amplifiers
in field-effect transistor 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 | H03F1/342 |
| Official title | {in field-effect transistor amplifiers} |
| Display label | in field-effect transistor amplifiers |
| Total patents | 341 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 24 |
| 2017 | 31 |
| 2018 | 37 |
| 2019 | 38 |
| 2020 | 39 |
| 2021 | 35 |
| 2022 | 29 |
| 2023 | 34 |
| 2024 | 27 |
| 2025 | 24 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Amplifier circuit and voltage regulator
US-9800156-B2 · Oct 24, 2017 · US
Apparatus for performing capacitor amplification in an electronic device
US-9800219-B2 · Oct 24, 2017 · US
Feedback circuit for power amplifier
US-2017302239-A1 · Oct 19, 2017 · US
Amplification systems
US-9793861-B1 · Oct 17, 2017 · US
Amplifier circuit with single-ended input and differential outputs
US-9774302-B1 · Sep 26, 2017 · US
Differential amplifier, receiver, and circuit
US-2017250663-A1 · Aug 31, 2017 · US
Semiconductor device outputting reference voltages
US-9742356-B2 · Aug 22, 2017 · US
Impedance transformation circuit for amplifier
US-2017194918-A1 · Jul 6, 2017 · US
Low-noise amplifier having high linearity for multi-band
US-9692369-B2 · Jun 27, 2017 · US
Apparatus and methods for power enhancement of self-biased distributed amplifiers with gate bias networks
US-2017170787-A1 · Jun 15, 2017 · US
Power amplifier
US-9647614-B2 · May 9, 2017 · US
Solid-state imaging device, imaging apparatus, and electronic apparatus with negative feedback circuit
US-9609249-B2 · Mar 28, 2017 · US
Apparatus for performing capacitor amplification in an electronic device
US-2017085234-A1 · Mar 23, 2017 · US
Switchable feedback circuit for radio-frequency power amplifiers
US-9602064-B2 · Mar 21, 2017 · US
Class-d amplifier with pulse-width modulation common-mode control and associated method for performing class-d amplification
US-2017077882-A1 · Mar 16, 2017 · US
Class-d audio amplifier
US-2017054416-A1 · Feb 23, 2017 · US
Differential voltage reference buffer with resistor chopping
US-2017054415-A1 · Feb 23, 2017 · US
Amplifier for modulating the amplitude of an rf signal
US-2017040960-A1 · Feb 9, 2017 · US
Amplifier compensating drift after sudden decrease of drain current
US-9531331-B2 · Dec 27, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H03F1/342?
- CPC H03F1/342 is the Cooperative Patent Classification code for “in field-effect transistor amplifiers.”
- How many patents are filed under CPC H03F1/342 (in field-effect transistor amplifiers)?
- Our database includes 341 publications tagged with this CPC code.
- Is patent activity under CPC H03F1/342 growing?
- Publication counts under this code: 27 in 2024 vs 24 in 2025 (latest complete years).