| 摘要 |
Inductors which can be constructed in a simple and compact manner and with closely controllable and uniform characteristics, including a stack of plates of ferromagnetic material, each plate having a flat spiral coil deposited thereon. Alternate plates are formed with central holes, and an electrical conductor extends through each hole to interconnect the inner turns of a pair of coils with a minimum disturbance of the magnetic fields established by the coils. Each pair of coils which are interconnected at their inner turns spiral in opposite directions so that a current passing serially through the coils creates additive magnetic fields.
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