Driver circuit for providing an output signal
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United States of America Patent
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Mar 31, 2009
Grant Date -
Dec 13, 2007
app pub date -
Mar 21, 2007
filing date -
Mar 31, 2006
priority date (Note) -
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Abstract
A driver circuit for providing an output signal for switching an electrical load on and off has a field-effect transistor having a gate terminal and an output for providing the output signal to the electrical load, a buffer circuit connected to the gate terminal of the field-effect transistor to impress a charge change current on the gate terminal of the field-effect transistor based on a drive signal, and a comparator having a first input for receiving the gate voltage and a second input for receiving the output signal to determine whether the gate voltage and the output voltage fulfill a predetermined relationship with respect to each other, and to provide the drive signal to the buffer circuit so that the charge change current is changed in magnitude when the predetermined relationship is fulfilled as compared to the charge change current when the predetermined relationship is not fulfilled.
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