H03F2203/21 - CPC Classification Index

ClassID:

219718 ⎘

H03F2203/21 - CPC Classification

Classification description:

Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by; Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only

Sub-classes:

H03F2203/211 » using a combination of several amplifiers 7

Recent Application in this class:

20250096737

LOW-NOISE AMPLIFIER (LNA) INPUT IMPEDANCE IMPROVEMENT USING COUPLING BETWEEN OUTPUT INDUCTOR AND DEGENERATION INDUCTOR

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DEVICES AND METHODS RELATED TO ADJUSTING POWER PROVIDED TO POWER AMPLIFIERS

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Versatile audio power amplifier

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Power amplifier apparatus, transmitter apparatus, and method of controlling the power amplifier apparatus

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Apparatus and methods for envelope shaping in power amplifier systems

20140232472

Method and Device for Protecting a High-Frequency Power Amplifier Against a Termination fault

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Versatile audio power amplifier