DIFF Subgroup
H03F 3/347 in integrated circuits
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > DC amplifiers in which all stages are DC-coupled > with semiconductor devices only > in integrated circuits
CPC:
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > DC amplifiers in which all stages are DC-coupled (H03F3/45 takes precedence) > with semiconductor devices only > in integrated circuits
No child classifications to compare. This is a leaf node in both IPC and CPC.