Communication apparatus and operation method thereof
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United States of America Patent
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Oct 13, 2015
Grant Date -
Feb 6, 2014
app pub date -
Jul 27, 2013
filing date -
Aug 1, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A communication apparatus includes a communication coil, a power receiving portion, a charge control portion, a first switch portion, a second switch portion, a communication circuit, and a processor. A voltage detection circuit of the power receiving portion generates first control signal of first state when a terminal voltage of the communication coil exceeds power supply threshold voltage. The first switch portion is controlled to turn on between first terminal and third terminal in response to first control signal. The voltage detection circuit generates second control signal of third state when a terminal voltage of the communication coil exceeds first and second charge threshold voltages during a period to charge the secondary cell. The second switch portion is controlled to turn off in response to second control signal.
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