IPC Subgroup
H03G 9/1 for tone control and volume expansion or compression
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 amplifiers > having discharge tubes > for tone control and volume expansion or compression
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- CONTROL OF AMPLIFICATION