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LOW POWER BANDGAP REFERENCE CIRCUIT WITH INCREASED ACCURACY AND REDUCED AREA CONSUMPTION
LOW POWER BANDGAP REFERENCE CIRCUIT WITH INCREASED ACCURACY AND REDUCED AREA CONSUMPTION
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机译:精度提高,面积消耗减少的低功耗带隙基准电路
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摘要
Bandgap reference (BGR) circuits and methods are described herein for providing high accuracy, low power Bandgap operation when using small, low voltage devices in the analog blocks of the BGR circuit. In some cases, chopped input stabilization and dynamic current matching techniques may be combined to compensate for input voltage offsets in the operational amplifier portion and current offsets in the current mirror portion of the Bandgap circuit. When used together, the chopped stabilization and dynamic current matching techniques provide a significant increase in accuracy, especially when using small, low voltage devices in the analog blocks to reduce layout area and support low power supply operation (e.g., power supply values down to about 1.4 volts and below).
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