TY - GEN
T1 - DLL-based pulse-width modulation digital-to-analog converter for continuous-time sigma delta modulators
AU - Chen, Zong Yi
AU - Hung, Chung-Chih
PY - 2014/9/23
Y1 - 2014/9/23
N2 - In this paper, the DLL-based pulse-width modulation (PWM) digital-to-analog converter (DAC) is proposed to convert the output of multi-bit quantizer to a single-bit pulse-width modulated signal in the modified continuous-time sigma-delta modulators (CT-SDMs) with improved signal transfer function (STF). The DLL-based PWM DAC is more robust to clock jitter and excess loop delay (ELD) effects than conventional multi-bit DAC and other PWM DAC with similar speed and power requirements of the integrators in CT-SDMs. Furthermore, the proposed PWM DAC is based on inherently linear single-bit DAC, so the dynamic-element matching (DEM) techniques, which increase the circuit complexity and power consumption to compensate the mismatch of unit elements in the multi-bit DAC, can be removed in CT-SDMs.
AB - In this paper, the DLL-based pulse-width modulation (PWM) digital-to-analog converter (DAC) is proposed to convert the output of multi-bit quantizer to a single-bit pulse-width modulated signal in the modified continuous-time sigma-delta modulators (CT-SDMs) with improved signal transfer function (STF). The DLL-based PWM DAC is more robust to clock jitter and excess loop delay (ELD) effects than conventional multi-bit DAC and other PWM DAC with similar speed and power requirements of the integrators in CT-SDMs. Furthermore, the proposed PWM DAC is based on inherently linear single-bit DAC, so the dynamic-element matching (DEM) techniques, which increase the circuit complexity and power consumption to compensate the mismatch of unit elements in the multi-bit DAC, can be removed in CT-SDMs.
UR - http://www.scopus.com/inward/record.url?scp=84908480274&partnerID=8YFLogxK
U2 - 10.1109/MWSCAS.2014.6908525
DO - 10.1109/MWSCAS.2014.6908525
M3 - Conference contribution
AN - SCOPUS:84908480274
T3 - Midwest Symposium on Circuits and Systems
SP - 757
EP - 760
BT - 2014 IEEE 57th International Midwest Symposium on Circuits and Systems, MWSCAS 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE 57th International Midwest Symposium on Circuits and Systems, MWSCAS 2014
Y2 - 3 August 2014 through 6 August 2014
ER -