Battery circuit for an integrated circuit (IC) memory card

Details Battery circuit for an integrated circuit (IC) memory card Battery circuit for an integrated circuit (IC) memory card

1988-12-06

1991-10-15

Gossage, Glenn

Static information storage and retrieval

Powering

Data preservation

365226, 307 64, 307 66, G11C 514

Patent

active

050580752

ABSTRACT:
A battery circuit incorporated in an integrated circuit (IC) memory card includes a power control circuit having a power output for connection to a power input of a memory chip of the IC memory card, a data backup battery and an active switching device. The active switching device prevents a current from flowing into the data backup battery when the voltage applied to an external power supply line is higher than the voltage of the battery. The active switching device electrically connects the battery for supplying the battery voltage to the power output in response to a voltage greater than the battery voltage applied to the power output through the external power supply line and electrically connects the battery to the power output when the battery is connected for supplying the battery voltage to the power output and the voltage of the battery is higher than that of the external power supply line. The switching device also disconnects the battery from the power output in response to a control signal supplied from outside of the card via the external power supply line.

REFERENCES:
patent: 4223395 (1980-09-01), Sakaguchi et al.
patent: 4395639 (1983-07-01), Bring
patent: 4611302 (1986-09-01), Bockett-Pugh
patent: 4857756 (1989-08-01), Haneda
patent: 4908790 (1990-03-01), Little et al.
Bhuta et al., "Extending Available Logic Power After a Primary Power Loss", IBM TDB, vol. 23, No. 7B, Dec. 1980, pp. 3165-3166.
"IC Memory Card Guideline" pp. 1-33, Sep. 1986, edited by personal computer affairs committee of Nippon Denshi Kogyo Shinko Kyokai.

Affiliated with

Also associated with

Rating

Battery circuit for an integrated circuit (IC) memory card does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Battery circuit for an integrated circuit (IC) memory card, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Battery circuit for an integrated circuit (IC) memory card will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-996429