BANDGAP REFERENCE VOLTAGE GENERATING CIRCUIT
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United States of America Patent
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Issued Date -
Jul 2, 2015
app pub date -
Jul 3, 2014
filing date -
Dec 27, 2013
priority date (Note) -
Abandoned
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Abstract
A bandgap reference voltage generating circuit, comprising: a current mirror, for respectively generating a first, a second and a third currents at a first, a second and a third current output terminals; a first OP; an input voltage generating module, for respectively generating a first, a second voltages at a first, a second operational input terminals of the first OP according to the first, second currents, wherein the first OP generates a control voltage to the current mirror according to the first, second voltages; and a voltage keeping module, comprising a first current receiving terminal for receiving the third current to generate a third voltage, and a reference voltage generating terminal coupled to a reference voltage resistance device and for generating a reference voltage according to the third current. The voltage keeping module controls the third voltage to be the same as the first or the second voltage.
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