System for identifying electric devices

Details System for identifying electric devices System for identifying electric devices

2000-01-27

2001-06-12

Wong, Peter S. (Department: 2838)

Electricity: battery or capacitor charging or discharging

Means to identify cell or battery type

Reexamination Certificate

active

06246210

ABSTRACT:

FIELD OF THE INVENTION
The present invention generally relates to a system for identifying electric devices.
BACKGROUND OF THE INVENTION
Nowadays, most of electric devices, especially computer-related devices, are made in an OEM or ODM fashion. A factory may produce a number of similar devices for different retail companies. To distinguish products for different retain companies, additional selection of hardware or additional software is usually needed to suit the requirement of different retail companies. This causes problems for the OEM or ODM manufacturers.
Furthermore, with the development of high speed transmission interface, such as Universal Serial Bus (USB), and wireless communication between electric devices, identification of a particular device in communication with a CPU is severely required in order to avoid any undesired confusion and mistake.
Thus, it is desired to have a system for readily identifying a particular electric device both in a manufacturing line and in operation.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a system for identifying an electric device.
In accordance with the present invention, a system for identifying an electric device comprises electric resistor(s) and electric capacitor(s) forming a discharging/charging circuit connected to input/output port(s) of a central processing unit (CPU), wherein the particular values of the resistance and capacity provide a unique identification code for the particular device. Such an identification code may be used to distinguish/identify products of different models manufactured in the same manufacturing line thereby allowing products of different models to be manufactured with the same manufacturing facility and thus effectively reducing manufacturing cost. The identification code may be used to identify a particular downstream device in a communication link between a CPU of a host machine and at least one downstream device (a peripheral device).
By using the system of the present invention, electric products of different models or different retail companies or different systems may be readily identified. Hardware and software for manufacturing may be shared by products of different models and manufacturing cost is reduced.


REFERENCES:
patent: 5587924 (1996-12-01), Rossi
patent: 5912544 (1999-06-01), Miyakawa et al.
patent: 5945803 (1999-08-01), Brotto et al.

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