Title :
Nyquist-rate time-interleaved current-steering DAC with dynamic channel matching
Author :
Cheng, Long ; Ye, Fan ; Yang, Hai-Feng ; Li, Ning ; Xu, Jun ; Ren, Jun-Yan
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
A Nyquist-rate time-interleaved current-steering digital-to-analog converter (DAC) with dynamic channel matching (DCM) is proposed. Thanks to the proposed Nyquist- rate time-interleaved architecture, the DAC can properly operate at more than lGS/s for a near-Nyquist output signal. The key limitation of the time-interleaved architecture is the mismatches between channels. The proposed DCM method can be applied to significantly suppress the spurious tones caused by imperfect channel matching. A 14-bit 1 GS/s current-steering DAC with behavior models and a 0.18μm CMOS technology is simulated to illustrate the wideband time-interleaved architecture and the harmonic elimination of the DCM.
Keywords :
CMOS integrated circuits; digital-analogue conversion; CMOS technology; Nyquist-rate DAC; current-steering DAC; digital-to-analog converter; dynamic channel matching; harmonic elimination; imperfect channel matching; size 0.18 mum; spurious tones; time-interleaved DAC; wideband time-interleaved architecture; Arrays; Clocks; Digital-analog conversion; Linearity; Switches; Synchronization;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5937409
