H03D 3/08 by means of diodes, e.g. Foster-Seeley discriminator
Introduced: September 1968
Full Title
Full titles differ between systems:
Demodulation of angle-modulated oscillations > by detecting phase difference between two signals obtained from input signal > by combining signals additively or in product demodulators > by means of diodes, e.g. Foster-Seeley discriminator
Demodulation of angle-, modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence) > by detecting phase difference between two signals obtained from input signal (H03D3/28 - H03D3/32 take precedence; ; limiting arrangements H03G11/00) > by combining signals additively or in product demodulators > by means of diodes, e.g. Foster-Seeley discriminator
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H03D 3/10 in which the diodes are simultaneously conducting during the same half period of the signal, e.g. radio detector 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