Invention Application
US20160072275A1 EMBEDDED OVERLOAD PROTECTION IN DELTA-SIGMA ANALOG-TO-DIGITAL CONVERTERS 有权
DELTA-SIGMA模拟数字转换器嵌入式过载保护

EMBEDDED OVERLOAD PROTECTION IN DELTA-SIGMA ANALOG-TO-DIGITAL CONVERTERS
Abstract:
Delta-sigma modulators do not handle overload well, and often become unstable if the input goes beyond the full-scale range of the modulator. To provide overload protection, an improved technique embeds an overload detector in the delta sigma modulator. When an overload condition is detected, coefficient(s) of the delta sigma modulator is adjusted to accommodate for the overloaded input. The improved technique advantageously allows the delta sigma modulator to handle overload gracefully without reset, and offers greater dynamic range at reduced resolution. Furthermore, the coefficient(s) of the delta sigma modulator can be adjusted in such a way to ensure the noise transfer function is not affected.
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