Apparatus and method for effecting controlled start up of a plurality of supply voltage signals
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United States of America Patent
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Feb 4, 2003
Grant Date -
N/A
app pub date -
Jan 11, 2002
filing date -
Jan 11, 2002
priority date (Note) -
Expired
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Abstract
An apparatus for controlling start up of supply voltages received from a power supply responding to control by a feedback signal includes: (a) first error amplifiers receiving a supply voltage at a first terminal, receiving a reference voltage at a second terminal and providing a first error signal to a switch indicating difference between the signals at the terminals; and (b) second error amplifiers having a first node coupled with the switch and for receiving the supply voltage and a second node receiving a reference voltage; the first node receives a sum of the first error signal and the supply voltage when the switch is in a first orientation, and receives the supply voltage when the switch is in a second orientation; each second error amplifier provides a second error signal indicating a difference between signals received at the nodes that is the feedback signal for controlling the power supply.
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