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DIFF Subgroup
H03K 3/288

using additional transistors in the input circuit (H03K3/289 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: using additional transistors in the input circuit

CPC: using additional transistors in the input circuit (H03K3/289 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Circuits for generating electric pulses; Monostable, bistable or multistable circuits > Generators characterised by the type of circuit or by the means used for producing pulses > by the use, as active elements, of bipolar transistors with internal or external positive feedback > using means other than a transformer for feedback > using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator > bistable > using additional transistors in the input circuit

CPC:

Circuits for generating electric pulses; Monostable, bistable or multistable circuits (H03K4/00 takes precedence; for digital function generators in computers G06F1/02) > Generators characterised by the type of circuit or by the means used for producing pulses (H03K3/64 - H03K3/84 take precedence) > by the use, as active elements, of bipolar transistors with internal or external positive feedback (H03K3/023, H03K3/027 take precedence) > using means other than a transformer for feedback > using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator > bistable > using additional transistors in the input circuit (H03K3/289 takes precedence)

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 1990.

Child Classifications

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  • H03K 3/2885 the input circuit having a differential configuration since 1990 IPC+CPC Available in IPC and CPC