Voltage level shifting apparatus
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United States of America Patent
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Feb 12, 2013
Grant Date -
Oct 25, 2012
app pub date -
Apr 20, 2011
filing date -
Apr 20, 2011
priority date (Note) -
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Abstract
A voltage level shifting apparatus is disclosed. The voltage level shifting apparatus has a cross-coupled transistor pair, a plurality of transistor pairs, a first diode string, a second diode string and an input transistor pair. One of the transistor pairs is coupled to the cross-coupled transistor pair, and the transistor pairs are controlled by a plurality of reference voltages. The first and the second diode strings are coupled between two of the transistor pairs. Each of the first and the second diode strings has at least one diode. The input transistor pair receives a first and a second input voltage, and the first and second input voltages are complementary signals. The cross-coupled transistor pair generates and outputs a first output voltage and a second output voltage by shifting the voltage level of the first and the second input voltage.
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