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PCE
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DIFF Subgroup
H03G 9/30

all amplifying stages having semiconductor devices

Introduced: September 1968

Full Title

Combinations of two or more types of control, e.g. gain control and tone control > in untuned amplifying stages as well as in frequency-selective amplifying stages > all amplifying stages having semiconductor devices

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