MODULATION

Introduced: September 1968

Classification Context

Section:: ELECTRICITY
Class:: ELECTRONIC CIRCUITRY
Subclass:: MODULATION

Description

H03C covers electronic circuits and devices for modulating signals, where information is encoded onto a carrier wave by varying one or more of its characteristics (amplitude, frequency, phase, or pulse properties). This subclass encompasses modulator designs, modulation techniques, and integrated circuit implementations across analog and digital domains, including amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), and pulse modulation methods. Related demodulation circuits are classified separately under H03D, while specific modulation applications in telecommunications, broadcasting, and radar systems may be further detailed in their respective technology classes.

Scope Notes

Limiting references: Masers, lasers Coding, decoding or code conversion, in general

Related Keywords

CIRCUITS for modulating sinusoidal oscillationsCONVERSION of kind of modulationFREQUENCY modulation of sinusoidal oscillationsHETERODYNINGKEYING of electric oscillationsMODULATION of sinusoidal oscillationsPHASE(S) modulation of sinusoidal oscillationsmodulating for TELECOMMUNICATION

5 direct subcodes

Child Classifications

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H03C 1/00 Amplitude modulation
H03C 3/00 Angle modulation
H03C 5/00 Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal
H03C 7/00 Modulating electromagnetic waves
H03C 99/00 Subject matter not provided for in other groups of this subclass