Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1993-02-05
1995-01-10
Pellinen, A. D.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307150, 361681, 361683, 361687, 364707, 3647081, H05K 502, H05K 720, G06F 104
Patent
active
053810430
ABSTRACT:
A power supply arrangement for a main unit of a portable, battery operated information processing apparatus including at least a microprocessor and a battery. The power supply arrangement comprising an expansion unit for the portable information processing apparatus for expanding the operation capability of the main unit of the information processing apparatus upon connection therewith. The expansion unit includes a power circuit for converting an a.c. voltage to a d.c. voltage, the power circuit enabling supply of power to the main unit when the expansion unit is connected with the main unit. Also, a connection arrangement is provided for the expansion unit and main unit.
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Kitahara Jun
Kohiyama Tomohisa
Fleming Fritz M.
Hitachi , Ltd.
Pellinen A. D.
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