Power supply using batteries undergoing great voltage variations
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United States of America Patent
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Mar 31, 1998
Grant Date -
N/A
app pub date -
Apr 4, 1996
filing date -
Apr 4, 1996
priority date (Note) -
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Abstract
A power supply using electric double layer capacitors whose output voltages undergo great variations. The power supply further includes first, second, and third switches for switching the capacitors from a parallel connection to a series connection, and a regulating circuit powered by the capacitors. As the output voltages from the capacitors drop, the regulating circuit switches the capacitors from the parallel connection to the series connection. For example, the switches are composed of semiconductor devices. The second and third switches are operated complementarily in relation to the first switch. Electric double layer capacitors producing low terminal voltages can be used. The step-up or step-down ratio can be made smaller. High voltage hazard can be avoided and the efficiency of the power supply can be improved.
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