Apparatus and method of operating two switches connecting respectively a load to power source terminals in response to a switch control signal
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United States of America Patent
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-
Aug 13, 2002
Grant Date -
N/A
app pub date -
Apr 9, 2001
filing date -
Apr 9, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for operating two switches connecting respectively a load to power source terminals in response to a switch control signal. The invention detects a signal indicative of current direction through the load to identify one of the switches as an active switch. If the switch control signal is for opening the active switch, an opening gate signal is sent to the active switch and a predetermined time period is triggered. If the switch control signal is for closing the active switch, an opening gate signal is sent to the other switch, a predetermined time period is triggered, and a closing gate signal is sent to the active switch when the predetermined time period of the timer associated with the other switch has elapsed.
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