首页>
外国专利>
BACKGROUND CALIBRATION OF RANDOM CHOPPING NON-IDEALITIES IN DATA CONVERTERS
BACKGROUND CALIBRATION OF RANDOM CHOPPING NON-IDEALITIES IN DATA CONVERTERS
展开▼
机译:数据转换器中随机切分非理想性的背景校准
展开▼
页面导航
摘要
著录项
相似文献
摘要
Random chopping is an effective technique for data converters. Random chopping can calibrate offset errors, calibrate offset mismatch in interleaved ADCs, and dither even order harmonics. However, the non-idealities of the (analog) chopper circuit can limit its effectiveness. If left uncorrected, these non-idealities cause severe degradation in the noise floor that defeats the purpose of chopping, and the non-idealities may be substantially worse than the non-idealities that chopping is meant to fix. To address the non-idealities of the random chopper, calibration techniques can be applied, using correlators and calibrations that may already be present for the data converter. Therefore, the cost and digital overhead are negligible. Calibrating the chopper circuit can make the chopping more effective, while relaxing the design constraints imposed on the analog circuitry.
展开▼