IPC Subgroup
H03G 9/26 in untuned amplifying stages as well as in frequency-selective amplifying stages
Introduced: September 1968
Last revised: January 2006
Full Title
Combinations of two or more types of control, e.g. gain control and tone control > in untuned amplifying stages as well as in frequency-selective amplifying stages
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- CONTROL OF AMPLIFICATION
2 direct subcodes
Child Classifications
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