H03D 7/00 Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Transference of modulation from one carrier to another, e.g. frequency-changing
CPC: Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)
Full Title
Full titles differ between systems:
Transference of modulation from one carrier to another, e.g. frequency-changing
Transference of modulation from one carrier to another, e.g. frequency-changing (H03D9/00, H03D11/00 take precedence; dielectric amplifiers, magnetic amplifiers, parametric amplifiers used as a frequency-changers H03F)
Of 9 combined children, 8 exist in both systems.
1 codes are CPC-only extensions.
5 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H03D 7/06 by means of discharge tubes having more than two electrodes (H03D7/14 - H03D7/22 take precedence) IPC+CPC Available in IPC and CPC
- H03D 7/12 by means of semiconductor devices having more than two electrodes (H03D7/14 - H03D7/22 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
- H03D 7/18 Modifications of frequency-changers for eliminating image frequencies IPC+CPC Available in IPC and CPC
- H03D 7/22 by deflecting an electron beam in a discharge tube (H03D7/20 takes precedence) IPC+CPC Available in IPC and CPC