DIFF Main Group
H03D 3/00 Demodulation of angle-, modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Demodulation of angle-modulated oscillations
CPC: Demodulation of angle-, modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)
Full Title
Full titles differ between systems:
IPC:
Demodulation of angle-modulated oscillations
CPC:
Demodulation of angle-, modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence)
Of 9 combined children, 6 exist in both systems.
3 codes are CPC-only extensions.
5 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H03D 3/02 by detecting phase difference between two signals obtained from input signal (H03D3/28 - H03D3/32 take precedence; ; limiting arrangements H03G11/00) IPC+CPC Available in IPC and CPC
- H03D 3/26 by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D3/28 - H03D3/32 takes precedence) IPC+CPC Available in IPC and CPC
- H03D 3/28 Modifications of demodulators to reduce effects of temperature variations (; automatic frequency control H03L) IPC+CPC Available in IPC and CPC
- H03D 3/32 by deflecting an electron beam in a discharge tube (H03D3/30 takes precedence) IPC+CPC Available in IPC and CPC
- H03D 3/34 by means of electromechanical devices (H03D3/16 takes precedence) since 1980 IPC+CPC Available in IPC and CPC