H03C MODULATION (masers or lasers H01S; coding, decoding or code conversion H03M)
Introduced: September 1968
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.
Title
Titles differ between systems:
IPC: MODULATION
CPC: MODULATION (masers or lasers H01S; coding, decoding or code conversion H03M)
Full Title
Full titles differ between systems:
MODULATION
MODULATION (masers or lasers H01S; coding, decoding or code conversion H03M)
Additional Content IPC
Masers, lasers Coding, decoding or code conversion, in general
Of 6 combined children, 5 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
4 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- H03C 1/00 Amplitude modulation (H03C5/00, H03C7/00 take precedence) IPC+CPC Available in IPC and CPC
- H03C 2200/00 Indexing scheme relating to details of modulators or modulation methods covered by H03C 2nd only +2 CPC CPC only CPC only
- H03C 3/00 Angle modulation (H03C5/00, H03C7/00 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
- H03C 5/00 Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal (H03C7/00 takes precedence) IPC+CPC Available in IPC and CPC
- H03C 7/00 Modulating electromagnetic waves (devices or arrangements for the modulation of light G02F1/00) IPC+CPC Available in IPC and CPC
- H03C 99/00 Subject matter not provided for in other groups of this subclass since 2006 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H03,2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 5,625
- SAMSUNG ELECTRONICS COMPANY KR 5,496
- MURATA MANUFACTURING COMPANY JP 5,478
- HUAWEI TECHNOLOGIES COMPANY CN 3,383
- INTEL CORPORATION US 3,091
- TEXAS INSTRUMENTS US 3,070
- MURATA MANUFACTURING COMPANY 2,722
- SKYWORKS SOLUTIONS US 2,290
- SEIKO EPSON CORPORATION 2,177
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158
Top Applicants (CPC)
Class H03,2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 7,293
- QUALCOMM US 7,085
- MURATA MANUFACTURING COMPANY JP 5,982
- HUAWEI TECHNOLOGIES COMPANY CN 4,641
- INTEL CORPORATION US 3,863
- TEXAS INSTRUMENTS US 3,409
- MURATA MANUFACTURING COMPANY 2,874
- SK HYNIX KR 2,644
- SKYWORKS SOLUTIONS US 2,545
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,437