A low-complexity digital background calibration of sample-time error in time-interleaved A/D converters

2013 ◽  
Vol 76 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Amir Bazrafshan ◽  
Mohammad Taherzadeh-Sani ◽  
Frederic Nabki
Keyword(s):  
Low Complexity ◽  
Background Calibration ◽  
Time Error ◽  
Digital Background Calibration ◽  
Time Interleaved ◽  
Sample Time

scholarly journals A Low Complexity All-Digital Background Calibration Technique for Time-Interleaved ADCs

VLSI Design ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Hongmei Chen ◽  
Yongsheng Yin ◽  
Honghui Deng ◽  
Fujiang Lin
Keyword(s):  
Average Energy ◽  
Low Complexity ◽  
Background Calibration ◽  
Calibration Technique ◽  
Farrow Structure ◽  
Digital Background Calibration ◽  
Sinusoidal Input ◽  
Calibration Algorithm ◽  
Fractional Delay Filter ◽  
Time Interleaved

A low complexity all-digital background calibration technique based on statistics is proposed. The basic idea of the statistics calibration technique is that the output average energy of each channel of TIADC will be consistent ideally, since each channel samples the same input signal, and therefore the energy deviation directly reflects the mismatch errors of channels. In this work, the offset mismatch and gain mismatch are calibrated by an adaptive statistics calibration algorithm based on LMS iteration; the timing mismatch is estimated by performing the correlation calculation of the outputs of subchannels and corrected by an improved fractional delay filter based on Farrow structure. Applied to a four-channel 12-bit 400 MHz TIADC, simulation results show that, with calibration, the SNDR raises from 22.5 dB to 71.8 dB and ENOB rises from 3.4 bits to 11.6 bits for a 164.6 MHz sinusoidal input. Compared with traditional methods, the proposed schemes are more feasible to implement and consume less hardware resources.

All-digital background calibration technique for timing mismatch of time-interleaved ADCs

Integration ◽  
2017 ◽  
Vol 57 ◽  
pp. 45-51 ◽  
Author(s):  
Hongmei Chen ◽  
Yunsheng Pan ◽  
Yongsheng Yin ◽  
Fujiang Lin
Keyword(s):  
Background Calibration ◽  
Calibration Technique ◽  
Digital Background Calibration ◽  
Time Interleaved
Sign in / Sign up

Export Citation Format

Share Document