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PCE
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CPC Subgroup
H03G 9/26

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

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

2 direct subcodes

Child Classifications

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  • H03G 9/28 all amplifying stages having discharge tubes
  • H03G 9/30 all amplifying stages having semiconductor devices