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PCE
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DIFF Subgroup
H03G 9/26

in untuned amplifying stages as well as in frequency-selective amplifying stages

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

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • H03G 9/28 all amplifying stages having discharge tubes IPC+CPC Available in IPC and CPC
  • H03G 9/30 all amplifying stages having semiconductor devices IPC+CPC Available in IPC and CPC