IPC Subgroup
H03F 3/68 Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
Introduced: September 1968
Last revised: January 2006
Full Title
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- AMPLIFIERS