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LOW NOISE AND LOW POWER PASSIVE SAMPLING NETWORK FOR A SWITCHED-CAPACITOR ADC WITH A SLOW REFERENCE GENERATOR
LOW NOISE AND LOW POWER PASSIVE SAMPLING NETWORK FOR A SWITCHED-CAPACITOR ADC WITH A SLOW REFERENCE GENERATOR
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机译:具有慢基准发生器的开关电容ADC的低噪声,低功耗无源采样网络
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摘要
Certain aspects of the present disclosure provide various sampling networks for switched-capacitor integrators, which may be used in switched-capacitor analog-to-digital converters (ADCs). Rather than having both an input sampling capacitor and a reference sampling capacitor, certain aspects of the present disclosure use a shared sampling capacitor for the reference voltage and the input voltage, thereby reducing ADC input-referred noise, decreasing op amp area and power, and avoiding anti-aliasing filter insertion loss. Furthermore, by sampling the reference voltage during the sampling phase and sampling the input voltage during the integration phase using the shared sampling capacitor, a high-bandwidth reference buffer need not be used for the reference voltage.
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