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PCE
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DIFF Subgroup
H03F 3/55

with semiconductor devices only

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Amplifiers using transit-time effect in tubes or semiconductor devices > with semiconductor devices only

CPC:

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > Amplifiers using transit-time effect in tubes or semiconductor devices (parametric amplifiers H03F7/00; solid state travelling-wave devices H10N70/10) > with semiconductor devices only

No child classifications to compare. This is a leaf node in both IPC and CPC.