Adaptive power direct current preregulator
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Jun 28, 1996
filing date -
Feb 22, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A direct current (dc) overvoltage, pre-regulation circuit regulates dc voltage supplied to a cable television line amplifier. The circuit provides overvoltage protection while permitting continuous operation of the line amplifier. The circuit opens the input to the downstream continuous voltage regulation circuit and cyclically charges a filter storage capacitor by periodic applications of the un-clipped voltage. The repeated switching regulates the dc voltage such that operation is sustained during periods of overvoltage that would normally shut down conventional circuits. No overall feedback is required to control the active device.
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