using varactors, i.e. voltage variable reactive diodes (H03J7/06 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: using varactors, i.e. voltage variable reactive diodes

CPC: using varactors, i.e. voltage variable reactive diodes (H03J7/06 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Automatic frequency control; Automatic scanning over a band of frequencies > Automatic frequency control > where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant > using varactors, i.e. voltage variable reactive diodes

CPC:

Automatic frequency control; Automatic scanning over a band of frequencies > Automatic frequency control (H03J7/18 takes precedence) > where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant > using varactors, i.e. voltage variable reactive diodes (H03J7/06 takes precedence)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1980.

Child Classifications

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H03J 7/10 Modification of automatic frequency control sensitivity or linearising automatic frequency control operation since 1980 IPC+CPC Available in IPC and CPC
H03J 7/12 Combination of automatic frequency control voltage with stabilised varactor supply voltage since 1980 IPC+CPC Available in IPC and CPC