Electronic system sharing power of doorbell, power supply device thereof, and power supply method thereof
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United States of America Patent
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Oct 24, 2017
Grant Date -
Jul 6, 2017
app pub date -
Mar 22, 2016
filing date -
Jan 4, 2016
priority date (Note) -
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Abstract
A power supply device sharing power of a doorbell includes two power contacts, an AC switch, an AC/DC conversion circuit, a doorbell actuator, a supply node, an enabling node, and a control node. When the AC switch is off, the AC/DC conversion circuit receives AC power through the two power contacts, generates DC power according to the AC power, and then outputs the generated DC power through the supply node to supply a post-stage circuit for operating. The doorbell actuator is configured to generate an enabling signal and outputting the generated enabling signal through the enabling node. The control node is configured to receive a control signal relative to the enabling signal, to have the AC switch turned on in response to the control signal to ring the doorbell.
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