Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
H03K 4/39

using a tube operating as an amplifier

Introduced: January 1980

Full Title

Generating pulses having essentially a finite slope or stepped portions > having triangular shape > having sawtooth shape > using as active elements vacuum tubes only > in which a sawtooth current is produced through an inductor > using a tube operating as an amplifier

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

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

Navigate with arrow keys, Enter to open

  • H03K 4/41 with negative feedback through a capacitor, e.g. Miller-integrator since 1980 IPC+CPC Available in IPC and CPC
  • H03K 4/43 combined with means for generating the driving pulses since 1980 IPC+CPC Available in IPC and CPC