Solar charging system for an IC card having voltage current regu

Details Solar charging system for an IC card having voltage current regu Solar charging system for an IC card having voltage current regu

1989-11-29

1990-11-13

Stephan, Steven L.

Electricity: power supply or regulation systems

Solar cell systems

320 2, 320 3, 320 9, 235380, H02J 704, G06K 1907

Patent

active

049704532

ABSTRACT:
An electronic apparatus such as an IC card is comprised of a power source including a secondary cell and solar cells which are connected in parallel to the secondary cell, an IC and a plurality of terminals inclusive of a power receiving terminal for contacting an external power source, and is characterized as also having voltage regulating diodes connected between the power receiving terminal and the secondary cell for regulating voltage applied to the secondary cell, and a current regulating diode connected between the power receiving terminal and the secondary cell and in parallel to the voltage regulaitng diodes for preventing the secondary cell from becoming directly recharged by an external power source connected to the apparatus through the power receiving terminal.

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patent: 4449057 (1984-05-01), Ishiwata
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patent: 4701693 (1987-10-01), Nishimura
patent: 4746787 (1988-05-01), Suto et al.
patent: 4827111 (1989-05-01), Kondo

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