Battery circuit with three-terminal memory device

Details Battery circuit with three-terminal memory device Battery circuit with three-terminal memory device

2005-04-12

2005-04-12

Nguyen, Tan T. (Department: 2818)

Static information storage and retrieval

Floating gate

C365S226000

Reexamination Certificate

active

06879517

ABSTRACT:
This invention includes a memory device having exactly three external terminals: a power external terminal; a ground or return external terminal; and a one-wire data communication external terminal. The memory is preferably employed in a rechargeable battery pack having exactly four terminals. The power external terminal is coupled to a battery terminal traditionally used for a thermistor. When a host device desires to read data from the memory, the host device closes a switch coupled between a power source and the thermistor battery terminal, thereby actuating the memory. The host then reads data by way of a communication channel established between a microprocessor in the host device and the data communication external terminal of the memory.

REFERENCES:
patent: 5926429 (1999-07-01), Saitoh et al.
patent: 6054843 (2000-04-01), Oglesbee
patent: 6108249 (2000-08-01), Hayashi et al.
patent: 6122215 (2000-09-01), Ohsawa
patent: 6246626 (2001-06-01), Roohparvar
patent: 6515919 (2003-02-01), Lee

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