IPC Subgroup
H03F 1/34 Negative-feedback-circuit arrangements with or without positive feedback
Introduced: September 1968
Last revised: January 2006
Full Title
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements > Negative-feedback-circuit arrangements with or without positive feedback
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- AMPLIFIERS
1 direct subcode
Child Classifications
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- H03F 1/36 in discharge-tube amplifiers