Voltage output circuit and apparatus for selectively outputting negative voltage using the same
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United States of America Patent
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Jul 15, 2014
Grant Date -
Feb 13, 2014
app pub date -
Nov 27, 2012
filing date -
Aug 7, 2012
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Abstract
An apparatus selectively outputs one negative voltage from among a plurality of negative voltages. The apparatus includes a first switching unit configured to perform a switching operation and output a first voltage-on signal and a first voltage-off signal according to a selection signal and a first negative voltage signal, and a second switching unit configured to perform a switching operation and to output a second voltage-on signal and a second voltage-off signal according to the selection signal and a second negative voltage signal. The apparatus also includes a driving unit to select and output one negative voltage signal from among the first and second negative voltage signals according to the first negative voltage signal, the second negative voltage signal, the first voltage-on signal, the first voltage-off signal, the second voltage-on signal, and the second voltage-off signal.
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