Flexible inductor

Details Flexible inductor Flexible inductor

1984-10-25

1987-09-08

Trafton, David L.

Registers

Records

Magnetic

235449, 235450, 336 20, G06K 1906

Patent

active

046926046

ABSTRACT:
Contactless inductive power transfer from a stationary "reader" to energize the electronics on a portable data or "smart" card is made practical through a flexible inductor carried on the card. The inductor, which acts as the secondary portion of a power transformer, comprises a flat coil and a flexible magnetic but nonmagnetostrictive core piece. The core piece may be a thin wafer of amorphous magnetic alloy. Clock pulses to synchronize data transfer on the card with the reader can also be generated from the signal picked up by the inductor.

REFERENCES:
patent: 3613101 (1971-10-01), Leonard et al.
patent: 4056411 (1977-11-01), Chen et al.
patent: 4187128 (1980-02-01), Billings et al.
patent: 4233523 (1980-11-01), Jarder et al.
patent: 4447716 (1984-05-01), Aigo

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