Method and circuit for supplying memory IC power
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 11, 1997
Grant Date -
N/A
app pub date -
Apr 29, 1996
filing date -
Apr 27, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A circuit for supplying power to an IC memory card by using primary and secondary batteries as a data preserving power means for the memory IC according to the present invention, includes: primary and secondary batteries; a secondary battery charging circuit for charging the secondary battery; and a primary and secondary battery backup circuit for connecting the primary and secondary batteries to the memory IC when an external power source is disconnected; a serial-parallel switching means for connecting the primary and secondary batteries in series or in parallel; a voltage detecting means for comparing a power voltage of the memory IC with a reference voltage to generate a voltage detection signal upon finding the power voltage dropped to below the reference voltage; and a switching control means for receiving the voltage detection signal of the voltage detecting means to control the serial-parallel switching means so as to connect the primary and secondary batteries in series or in parallel.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully