using a semiconductor device operating as an amplifier

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

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

CPC:

Generating pulses having essentially a finite slope or stepped portions > having triangular shape > having sawtooth shape > using as active elements semiconductor devices (H03K4/787 - H03K4/84 take precedence) > in which a sawtooth current is produced through an inductor > using a semiconductor device operating as an amplifier

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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H03K 4/693 CPC only CPC only
H03K 4/696 CPC only CPC only
H03K 4/71 with negative feedback through a capacitor, e.g. Miller-integrator since 1980 IPC+CPC Available in IPC and CPC
H03K 4/72 combined with means for generating the driving pulses +1 CPC IPC+CPC Available in IPC and CPC