DIFF Subgroup
H03K 17/08 Modifications for protecting switching circuit against overcurrent or overvoltage
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Electronic switching or gating, i.e. not by contact-making and -breaking > Modifications for protecting switching circuit against overcurrent or overvoltage
CPC:
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) > Modifications for protecting switching circuit against overcurrent or overvoltage
Of 4 combined children, 2 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.
IPC defines codes here since 1995.
Child Classifications
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- H03K 17/081 without feedback from the output circuit to the control circuit since 1995 +4 CPC IPC+CPC Available in IPC and CPC
- H03K 17/082 by feedback from the output to the control circuit since 1995 +4 CPC IPC+CPC Available in IPC and CPC