IPC Subgroup
H03J 7/02 Automatic frequency control
Introduced: January 1980
Last revised: January 2006
Full Title
Automatic frequency control; Automatic scanning over a band of frequencies > Automatic frequency control
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
Scope Notes
Limiting references: Automatic scanning over a band of frequencies
2 direct subcodes
Child Classifications
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- H03J 7/04 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
- H03J 7/16 where the frequency control is accomplished by mechanical means, e.g. by a motor