Demodulation of amplitude-modulated oscillations

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: ELECTRICITY
Class:: ELECTRONIC CIRCUITRY
Subclass:: DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER

Additional Content

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

6 direct subcodes

Child Classifications

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H03D 1/02 Details
H03D 1/08 by means of non-linear two-pole elements
H03D 1/14 by means of non-linear elements having more than two poles
H03D 1/22 Homodyne or synchrodyne circuits
H03D 1/26 by means of transit-time tubes
H03D 1/28 by deflecting an electron beam in a discharge tube

Top Applicants

Top 10 applicants by patent filingsfor 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