Bandgap Voltage Reference
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United States of America Patent
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Issued Date -
Dec 1, 2016
app pub date -
Dec 3, 2015
filing date -
Dec 3, 2015
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Abstract
A bandgap circuit for providing a bandgap voltage reference comprises a first capacitor and a second capacitor. An inverting amplifier, which is associated with an offset voltage has an input terminal connected to a first terminal of the first capacitor and a first terminal of the second capacitor, and an output terminal connected to an output terminal of the bandgap circuit. A temperature dependent component has a temperature dependent terminal wherein a voltage of the temperature dependent terminal has a linear relationship with a temperature based on a temperature constant, wherein the temperature constant depends on an amount of current, wherein a second terminal of the second capacitor is connected to the temperature dependent terminal. A first switch selectively connects a second terminal of the first capacitor with the temperature dependent terminal. A second switch selectively connects the output terminal of the inverting amplifier with the input terminal.
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