H03F13/00 - CPC Classification Index

ClassID:

219511 ⎘

H03F13/00 - CPC Classification

Classification description:

Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier

AMPLIFIER CIRCUIT FOR MICROPHONE, MICROPHONE CIRCUIT AND ELECTRONIC DEVICE

Earbud operation during earbud insertion detection

Headphone operation during headphone insertion detection

EARBUD OPERATION DURING EARBUD INSERTION DETECTION

Operation of a personal audio device during insertion detection

Headphone operation during headphone insertion detection

Controlling parameters of an amplifier system based on a measured physical quantity

Audio amplifier

RF power amplifier with spectrally grouped nanosized switches

High temperature charge amplifier for geothermal applications