Demodulation of angle-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

I/Q in-phase, quadrature

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 Frequency demodulators adapted for digitally modulated-carrier systems, i.e. using frequency-shift keying Phase demodulators adapted for digitally modulated-carrier systems, i.e. using phase-shift keying

Related Keywords

DISCRIMINATORS for electric signalsFREQUENCY discriminatorsPHASE(S) discriminators

6 direct subcodes

Child Classifications

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H03D 3/02 by detecting phase difference between two signals obtained from input signal
H03D 3/26 by means of sloping amplitude/frequency characteristic of tuned or reactive circuit
H03D 3/28 Modifications of demodulators to reduce effect of temperature variations
H03D 3/3 by means of transit-time tubes
H03D 3/32 by deflecting an electron beam in a discharge tube
H03D 3/34 by means of electromechanical devices

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