High voltage level shifting IC with under-ground voltage swing withstanding capability
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United States of America Patent
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Nov 22, 2005
Grant Date -
Dec 18, 2003
app pub date -
Jun 12, 2003
filing date -
Jun 12, 2002
priority date (Note) -
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Abstract
A level shifting circuit provides a reference bias voltage to permit signal transfer between two circuits with different common voltage reference levels. The bias voltage is less than a common voltage reference level for either of the two connected circuits. By providing the bias voltage, the range of variation for the common voltage reference levels between the two circuits is increased when the reference voltages float with respect to each other. The level shifting circuits permit signals to be transferred from a low voltage to a high voltage circuit with increased reliability and noise immunity, and vice versa. The level shifting circuit is particularly useful for driving a half bridge switch configuration, and transmitting a floating current sense signal.
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