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Noise shaping comparator based switch capacitor circuit and method thereof
Noise shaping comparator based switch capacitor circuit and method thereof
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机译:基于噪声整形比较器的开关电容器电路及其方法
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摘要
A noise shaping comparator based switch capacitor (CBSC) comprises a comparator, a charge pump, a plurality of capacitors, and a plurality of shufflers. Each shuffler is controlled by a logical signal to determine a polarity of connection for a circuit element within the CBSC circuit. The CBSC circuit operates cyclically through a sampling phase and a transfer phase. During the sampling phase, the CBSC circuit samples an input voltage; during the transfer phase, the CBSC circuit amplifies the sampled input voltage by a ratio and transfers a first resultant voltage to a load using the charge pump circuit. A noise induced by the CBSC circuit due to circuit non-idealities is thus modulated by the logical signal. The noise is therefore spectrally shaped into having a spectral characteristics determined by the logical signal.
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