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)

Child Classifications

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• H03D 7/005
• H03D 7/02 by means of diodes (H03D7/14 - H03D7/22 take precedence)
• H03D 7/06 by means of discharge tubes having more than two electrodes (H03D7/14 - H03D7/22 take precedence)
• H03D 7/12 by means of semiconductor devices having more than two electrodes (H03D7/14 - H03D7/22 take precedence)
• H03D 7/14 Balanced arrangements
• H03D 7/16 Multiple-frequency-changing
• H03D 7/18 Modifications of frequency-changers for eliminating image frequencies
• H03D 7/20 by means of transit-time tubes
• H03D 7/22 by deflecting an electron beam in a discharge tube (H03D7/20 takes precedence)