Voltage generation apparatus and voltage generation method
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United States of America Patent
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Dec 23, 2014
Grant Date -
Jan 31, 2013
app pub date -
Jul 20, 2012
filing date -
Jul 22, 2011
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Abstract
A voltage generation apparatus includes a booster circuit which outputs a direct-current voltage after having performed boosting processing, the voltage value of the direct-current voltage being specified on the basis of a pulse width of a series of pulse signals inputted, a direct-current to alternating-current conversion circuit which generates a ringer voltage to be supplied to a device connectable to a telephone line by converting the direct-current voltage outputted by the booster circuit to an alternating-current voltage, and a control unit which outputs a series of pulse signals to the booster circuit. the series of pulse signals having a feeding-voltage pulse width corresponding to a target voltage value of a feeding, voltage or a ringer-voltage pulse width corresponding to a target voltage value. the feeding-voltage pulse width and the linger-voltage pulse width being pulse widths having been set in a voltage adjustment stage.
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