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PCE
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DIFF Subgroup
H03L 1/02

against variations of temperature only

Introduced: January 1980

Full Title

Stabilisation of generator output against variations of physical values, e.g. power supply > against variations of temperature only

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

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  • H03L 1/021 CPC only CPC only
  • H03L 1/028 CPC only CPC only
  • H03L 1/04 Constructional details for maintaining temperature constant since 1980 IPC+CPC Available in IPC and CPC