Telephone line power supply
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United States of America Patent
Stats
-
Mar 3, 2009
Grant Date -
Jun 20, 2002
app pub date -
Nov 6, 2001
filing date -
Nov 9, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A telephone line driven power supply and power supply method capable of creating high yield, low voltage power using power drawn from a telephone line and supplementing the low voltage power with power from a battery-powered host device, such as a laptop PC, when the voltage level falls below a predetermined voltage level. The telephone line power supply includes a polarity guard, a gyrator, an oscillator, a pulse circuit, an inductor, a startup circuit, a converter, a shunt regulator, and a combiner circuit. The method includes supplying line power from power drawn from a telephone line, receiving host power from a host device, supplying the line power to an electrical device, and supplementing the line power with the host power when the voltage level of the line power falls below a predetermined level.
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