H03C MODULATION (masers or lasers H01S; coding, decoding or code conversion H03M)
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.
6 direct subcodes
Child Classifications
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- H03C 1/00 Amplitude modulation (H03C5/00, H03C7/00 take precedence)
- H03C 2200/00 Indexing scheme relating to details of modulators or modulation methods covered by H03C
- H03C 3/00 Angle modulation (H03C5/00, H03C7/00 take precedence)
- H03C 5/00 Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal (H03C7/00 takes precedence)
- H03C 7/00 Modulating electromagnetic waves (devices or arrangements for the modulation of light G02F1/00)
- H03C 99/00 Subject matter not provided for in other groups of this subclass