with semiconductor devices only

Introduced: September 1968

Full Title

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

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

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H03F 3/06 using hole storage effect IPC+CPC Available in IPC and CPC
H03F 3/08 controlled by light +3 CPC IPC+CPC Available in IPC and CPC
H03F 3/10 with diodes IPC+CPC Available in IPC and CPC
H03F 3/14 with amplifying devices having more than three electrodes or more than two PN junctions IPC+CPC Available in IPC and CPC
H03F 3/16 with field-effect devices +1 CPC IPC+CPC Available in IPC and CPC