Over-sampling ADCs reduce quantization noise power in the baseband ( Especially when sampling frequency is greatly larger than baseband frequency ), and improve the base-band signal to noise ratio, to increase the resolution of the converter. 过采样ADC通过过采样技术,将基带中的量化噪声功率降低(特别是当采样频率比基带频率大很多时),提高了基带内的信噪比,达到了增加转换器的有效量化位数的目的。