REFERENCE VOLTAGE CIRCUIT
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United States of America Patent
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Issued Date -
Oct 8, 2009
app pub date -
Apr 3, 2009
filing date -
Apr 4, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a reference voltage circuit including a first I-V(current-to-voltage) converter, a second I-V converter, a current mirror and a control circuit. The first I-V converter includes a parallel connection of a diode and a resistor, and the second I-V converter includes parallel-connected diodes, series-connected resistors connected in parallel with the diodes, and a resistor connected between the diodes and the ground. The current mirror supplies currents to the first and second I-V converters. The control circuit controls so that a preset output voltages of the first and second I-V converters will be equal. A mid-point terminal voltage of the first or second I-V converter is used as a reference voltage Vref.
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