Advanced SearchSearch Tips
Design and Analysis of Decimation Filers with Minimal Distortion for a High Speed High Performance Sigma-Delta ADC
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Design and Analysis of Decimation Filers with Minimal Distortion for a High Speed High Performance Sigma-Delta ADC
Kang, Ho-jin; Kim, Hyung-won;
  PDF(new window)
While the oversampling sigma-delta ADCs are known to have high resolution, they often suffer from SNDR losses when operated at a very high data clock. This paper presents a design and implementation of a decimation filter that provides minimum distortion at passband for high-speed sigma-delta ADC. The proposed digital decimation filter employs a butterworth structure. To evaluate the performance of the proposed decimation filter, we implemented a 1-bit, third-order, OSR=64 sigma-delta modulator followed by the proposed decimation filter. Using the simulation ad measurement, we compared the performance of the proposed decimation filter with a conventional CIC(cascaded integrator comb) decimation filter, which is commonly used in most sigma-delta ADCs. The measurement results show that the proposed decimation filter presents substantially lower distortion at passband and thus can provide must higher SNDR.
Sigma-Delta ADC;Decimation Filter;CIC Filter;Butterworth Filter;
 Cited by
E. B. Hogenauer, "An Economical class of Digital Filters for Decimation and Interpolation," IEEE Trans., Acoustic, Speech and Signal Processing, vol. ASSP -29, No. 2, pp. 155-162, April. 1981.

Jose M. de la Rosa, Rocio del Rio, "CMOS Sigma-Delta Converters," Wiley - IEEEPress, pp. 334-354, 2013.

J. Candy, "Decimation for sigma delta modulation," IEEE Trans. Commun., vol. COM-34, pp. 72-76, January 1986.

Erer, K. S., "Adaptive Usage of the Butterworth Digital Filter," Journal of Biomechanics, Vol. 40, No. 13, pp. 2937 - 2943, April. 2007.

A. V. Oppenheim and R. W. Schafer, "Digital Signal Processing", PrenticeHall, 1975.

R. M. Hewlitt, E. S. Swartzlander Jr., "Canonical signed digit representation for digital filters", IEEE Workshop on Signal Processing Systems, SiPS 2000, pp.416-426, Oct. 2000.

Un-yong Jang, HyungWon Kim, "Frequency Division Concurrent Sensing Method for High-Speed Detection of Large Touch Screens," Journal of KIICE, Vol19, No. 4, pp. 895-902, April. 2015.