Title :
Double noise coupling ΔΣ analogue-to-digital converter
Author :
Jung, Yongmin ; Lee, Sang-Rim ; Chen, Chun-Hung ; Temes, Gabor C.
Author_Institution :
Kelley Eng. Center, Oregon State Univ., Corvallis, OR, USA
Abstract :
A novel ΔΣ analogue-to-digital (ADC) architecture is proposed for second-order noise shaping enhancement. The new architecture is less dependent on the opamp DC gain than the earlier ΔΣ ADC with second-order noise shaping enhancement. Also, the proposed architecture reduces the complexity of the clock generator and zero optimisation compared to the earlier one. A ΔΣ ADC using the new configuration was designed and simulated. The results verify the advantages of the proposed structure.
Keywords :
analogue-digital conversion; delta-sigma modulation; operational amplifiers; clock generator; double noise coupling ΔΣ ADC; double noise coupling ΔΣ analogue-to-digital converter; opamp DC gain; second-order noise shaping enhancement; zero optimisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.0272
