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DELTA-SIGMA MODULATOR, ANALOG-TO-DIGITAL CONVERTER AND ASSOCIATED SIGNAL CONVERSION METHOD BASED ON MULTI STAGE NOISE SHAPING STRUCTURE
DELTA-SIGMA MODULATOR, ANALOG-TO-DIGITAL CONVERTER AND ASSOCIATED SIGNAL CONVERSION METHOD BASED ON MULTI STAGE NOISE SHAPING STRUCTURE
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机译:基于多阶段噪声整形结构的DELTA-SIGMA调制器,模数转换器和相关信号转换方法
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摘要
To convert a first stage input to a digital output, a delta-sigma modulator, an analog-to-digital converter and an associated signal conversion method based on an MASH structure are provided. The analog-to-digital converter includes the delta-sigma modulator and a sample and hold circuit. The delta-sigma modulator includes a first signal converter, a second signal converter and a digital cancellation logic. The first signal converter converts the first stage input to a first converted output. The first signal converter shapes a first stage quantization error to generate a second stage input. The first stage input and the second stage input are analog signals. The second signal converter converts the second stage input to a second converted output. The digital cancellation logic generates a digital output according to the first converted output and the second converted output.
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