摘要
This paper provides a mixed continuous-time/discrete-time,single-loop,4th-order,4-bit audio-band sigma delta ADC with capacitor digital self-calibration for RC spread compensation.This ADC combines the benefits of CT and DT circuits,and the self-calibration control circuits compensate for the variation of the RC product in the continuous-time integrator and for variation in the sampling frequency.Measurement results show that the peak SNR of this ADC reaches 102 dB and the total power consumption is less than 30 mW.
This paper provides a mixed continuous-time/discrete-time,single-loop,4th-order,4-bit audio-band sigma delta ADC with capacitor digital self-calibration for RC spread compensation.This ADC combines the benefits of CT and DT circuits,and the self-calibration control circuits compensate for the variation of the RC product in the continuous-time integrator and for variation in the sampling frequency.Measurement results show that the peak SNR of this ADC reaches 102 dB and the total power consumption is less than 30 mW.
