IPC Subgroup
H03F 1/5 with tubes only
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 > Modifications of amplifiers to extend the bandwidth > of aperiodic amplifiers > with tubes only
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- AMPLIFIERS