where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element

Introduced: January 1980

Last revised: January 2006

Full Title

Automatic frequency control; Automatic scanning over a band of frequencies > Automatic scanning over a band of frequencies > where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element

Classification Context

Section:: ELECTRICITY
Class:: ELECTRONIC CIRCUITRY
Subclass:: TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS

3 direct subcodes

Child Classifications

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H03J 7/22 in which an automatic frequency control circuit is brought into action after the scanning action has been stopped
H03J 7/24 using varactors, i.e. voltage variable reactive diodes
H03J 7/28 using counters or frequency dividers