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PCE
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IPC Subgroup
H03F 3/04

with semiconductor devices only

Introduced: September 1968

Last revised: January 2006

Full Title

Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements > with semiconductor devices only

Classification Context

Section:
ELECTRICITY
Class:
ELECTRONIC CIRCUITRY
Subclass:
AMPLIFIERS

5 direct subcodes

Child Classifications

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  • H03F 3/06 using hole storage effect
  • H03F 3/08 controlled by light
  • H03F 3/14 with amplifying devices having more than three electrodes or more than two PN junctions
  • H03F 3/16 with field-effect devices