DIFF Main Group
H03F 9/00 Magnetic amplifiers
Introduced: September 1968
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1974.
Child Classifications
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- H03F 9/02 current-controlled, i.e. the load current flowing in both directions through a main coil since 1974 IPC+CPC Available in IPC and CPC
- H03F 9/04 voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits (H03F9/06 takes precedence) since 1974 IPC+CPC Available in IPC and CPC
- H03F 9/06 Control by voltage time integral, i.e. the load current flowing in only one direction through a main coil, whereby the main coil winding also can be used as a control winding, e.g. Ramey circuits since 1974 IPC+CPC Available in IPC and CPC