Memory package system

Details Memory package system Memory package system

1990-02-22

1992-07-07

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

455 41, 36518901, 369 59, H04L 2300

Patent

active

051289725

ABSTRACT:
Bidirectional transmission of write and read data is effected between a reader/writer unit and a memory module in a contactless manner using electromagnetic induction coupling. A single magnetic induction coupling apparatus is provided for each of the reader/writer unit and the memory module. In the electromagnetic induction coupling apparatus of the reader/writer unit, a transmitting coil and a receiving coil are coaxially wound around a single magnetic core. In the electromagnetic induction coupling apparatus of the memory module, a single coil which is commonly used for transmission and reception is wound around a single magnetic core. A reception signal of the transmitting/receiving coil of the memory module is rectified and smoothed by a power source circuit, thereby forming an operating power source of the memory module. The power source circuit has a backup capacitor. In the transmitting mode in which no power source is externally supplied, the operating power source is supplied from the backup capacitor.

REFERENCES:
patent: 4858133 (1989-08-01), Takeuchi et al.

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