Electronic device and method providing a voltage reference
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United States of America Patent
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May 27, 2014
Grant Date -
Nov 7, 2013
app pub date -
Nov 29, 2010
filing date -
Dec 2, 2009
priority date (Note) -
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Abstract
An electronic device includes a bandgap reference voltage generation stage. The bandgap reference voltage generation stage comprises a device with a PN-junction, a current source feeding a first current during a first period of time and a second higher current during a second period of time through the PN-junction. The bandgap reference voltage is generated from a combination of a first voltage drop across the PN-junction during the first period of time and a second voltage drop across the PN-junction during the second period of time. This bandgap reference voltage is formed using switched capacitors.
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