TY - JOUR
T1 - Automatic coefficients design for high-order sigma-delta modulators
AU - Kuo, Tai Haur
AU - Chen, Kuan Dar
AU - Chen, Jhy Rong
N1 - Funding Information:
Manuscript received October 14, 1997; revised July 19, 1998. This work was supported by the National Science Council of Taiwan under Grant NSC84-2221-E-006-011. This paper was recommended by Associate Editor E. Soenen.
PY - 1999
Y1 - 1999
N2 - An automatic-design methodology for designing high-tolerance modulator coefficients for high-order sigma-delta modulators (SDM's) from system specifications is presented. The methodology covers many design concerns including SDM coefficient tolerances for circuit component mismatch, stability, reduction of in-band tones, design tradeoffs among in-band noise suppression, oversampling ratio, and modulator order. Moreover, a high-order SDM synthesis tool (HOST) based on the methodology has been implemented in a C language program. Even for inexperienced designers, reliable and high-tolerance SDM coefficients for various applications can be automatically and efficiently generated using HOST. For synthesized SDM's with orders from three to eight and oversampling ratios from 32 to 256, coefficient variations within 2% (1% for the eighth order) are allowed and the resulting peak signal-to-noise ratio degradation is less than 3 dB. Several design examples synthesized by HOST are included.
AB - An automatic-design methodology for designing high-tolerance modulator coefficients for high-order sigma-delta modulators (SDM's) from system specifications is presented. The methodology covers many design concerns including SDM coefficient tolerances for circuit component mismatch, stability, reduction of in-band tones, design tradeoffs among in-band noise suppression, oversampling ratio, and modulator order. Moreover, a high-order SDM synthesis tool (HOST) based on the methodology has been implemented in a C language program. Even for inexperienced designers, reliable and high-tolerance SDM coefficients for various applications can be automatically and efficiently generated using HOST. For synthesized SDM's with orders from three to eight and oversampling ratios from 32 to 256, coefficient variations within 2% (1% for the eighth order) are allowed and the resulting peak signal-to-noise ratio degradation is less than 3 dB. Several design examples synthesized by HOST are included.
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U2 - 10.1109/82.749075
DO - 10.1109/82.749075
M3 - Article
AN - SCOPUS:0032665907
SN - 1057-7130
VL - 46
SP - 6
EP - 15
JO - IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
JF - IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
IS - 1
ER -