Demodulation of amplitude-modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Demodulation of amplitude-modulated oscillations

CPC: Demodulation of amplitude-modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)

Full Title

Full titles differ between systems:

IPC:

Demodulation of amplitude-modulated oscillations

CPC:

Demodulation of amplitude-modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)

Additional Content IPC

Glossary

IP2 Second Order Intercept Point IM2 Second order intermodulation product

Limiting references

Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will Demodulation or transference of modulation of modulated electromagnetic waves Super-regenerative demodulator circuits Amplitude demodulators adapted for digitally modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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H03D 1/02 Details IPC+CPC Available in IPC and CPC
H03D 1/08 by means of non-linear two-pole elements (H03D1/22, H03D1/26, H03D1/28 take precedence) IPC+CPC Available in IPC and CPC
H03D 1/14 by means of non-linear elements having more than two poles (H03D1/22, H03D1/26, H03D1/28 take precedence) IPC+CPC Available in IPC and CPC
H03D 1/22 Homodyne or synchrodyne circuits +5 CPC IPC+CPC Available in IPC and CPC
H03D 1/26 by means of transit-time tubes IPC+CPC Available in IPC and CPC
H03D 1/28 by deflecting an electron beam in a discharge tube (H03D1/26 takes precedence) 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