DIFF Subgroup
H04L 27/22 Demodulator circuits; Receiver circuits
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Modulated-carrier systems > Phase-modulated carrier systems, i.e. using phase-shift keying > Demodulator circuits; Receiver circuits
CPC:
Modulated-carrier systems > Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) > Demodulator circuits; Receiver circuits
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1995.
Child Classifications
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