H03K 17/78 using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
Introduced: September 1968
Title
Titles differ between systems:
IPC: by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
CPC: using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
Full Title
Full titles differ between systems:
Electronic switching or gating, i.e. not by contact-making and -breaking > characterised by the use of specified components > by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
Electronic switching or gating, i.e. not by contact-making and –breaking (gated amplifiers H03F3/72; switching arrangements for exchange systems using static devices H04Q3/52) > characterised by the components used (H03K17/04 - H03K17/30, H03K17/94 take precedence) > using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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- H03K 17/785 controlling field-effect transistor switches since 1990 IPC+CPC Available in IPC and CPC
- H03K 17/79 controlling semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region since 1990 IPC+CPC Available in IPC and CPC