Backup battery system for a portable electronic device

Details Backup battery system for a portable electronic device Backup battery system for a portable electronic device

1992-02-03

1995-03-21

Stephan, Steven L.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

363 59, 307 66, 320 38, 320 47, 320 50, G05F 146

Patent

active

053999568

ABSTRACT:
In a device having a primary battery 10, a first voltage multiplier 20 is used to power digital electrical circuits 40 from the primary battery, and a second voltage multiplier 100-136 is used to recharge a backup battery 50 from the primary battery. The backup battery is charged to a voltage greater than the voltage generated by the first voltage multiplier. Methods of controlling the second voltage multiplier reduce its interference in measurement of device parameters, and reduce the power consumed from the primary battery.

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