时间交替采样系统的误差测量与FPGA实现

时间交替采样结构是模数转换中提高采样率的1种有效方法.但由于器件工艺限制,每个通道的不一致性会引入通道失配误差,而这些误差会导致信号存在较大的杂散分量,将会严重影响ADC的性能.通道误差包括增益误差、时间误差、偏置误差.提出了一种频域的方法通过对单路采样信号做快速傅里叶变换并由固定位置方法找出误差的频域值,对此频域值做...

Measurement and calibration of mismatched errors in multi-chip ADC time-interleaved systems

Time-interleaved sampling system is a efficient method to increase the sampling rate of the analog to digital converter(ADC) system.But because of the limits of the manufacture technics,the mismatch between different channels will cause the mismatch errors.These errors will produce new noises in signals and affect the performence of ADC system.Channel mismatch error includs gain error,time error and offset error.In this paper,a method based on fft for single signal to Calculation the mismatch errors is pres...