Bandgap circuit having a zero temperature coefficient
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United States of America Patent
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May 15, 2012
Grant Date -
Jan 20, 2011
app pub date -
Jul 15, 2009
filing date -
Jul 15, 2009
priority date (Note) -
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Abstract
A bandgap circuit is provided, which includes a current source, a voltage boost circuit, a voltage input circuit, a voltage equalizer circuit, and a voltage output circuit. The current source provides a first current, a second current, and a third current, which are equal to one another. The voltage boost circuit provides a boost voltage by a single current path. The voltage input circuit receives the first and the second currents, and provides a first input voltage and a second input voltage based on the boost voltage. The voltage equalizer circuit receives the first and the second input voltages and equalize the two input voltages. The voltage output circuit provides a bandgap reference voltage according to the third current.
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