Portable terminal unit with a dual purpose external connection

Details Portable terminal unit with a dual purpose external connection Portable terminal unit with a dual purpose external connection

1993-11-09

1996-05-07

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

34031006, 3403111, 455 89, 455117, 455217, H02H 314

Patent

active

055152287

ABSTRACT:
In portable terminal units each of which has a rechargeable battery and a data processing section, one terminal is used as both a terminal for charging the rechargeable battery and a terminal for connecting a data processing unit to an external data processing unit. First protective circuitry protects the data processing unit from a battery charging current and second protective circuitry eliminates loading of the rechargeable battery due to a data voltage and protects the external data processing unit from charging current for the chargeable battery.

REFERENCES:
patent: 4857884 (1989-08-01), O'Malley et al.
Uniden, Challenge for Excellence brochure. (no date).

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