Title :
Design Of Decimation Filter For Multibit Sigmadelta Modulator With Two-step Quantization
Author :
Kuncheva, A.S. ; Fujcik, L. ; Mougel, T. ; Donchev, B. ; Hristov, M.
Author_Institution :
Sofia Tech. Univ.
Abstract :
This paper describes steps involved in a VHDL design of digital decimation filter for multibit sigma-delta (SigmaDelta) modulator. Parameters of decimation filter are derived from the specification of the multibit SigmaDelta modulator with two-step quantization architecture. Using Matlab tool it is possible to find the filter order, the required quantization level for the coefficients and their values. Finally, by analyzing the design, we can find an efficient way to implement the filter in hardware. This structure is designed in two versions using VHDL. The design is programmed and tested on a Xilinx FPGA -Spartan 3 XC3S200-5FT256
Keywords :
FIR filters; comb filters; field programmable gate arrays; hardware description languages; quantisation (signal); sigma-delta modulation; A/D conversion; Matlab tool; Spartan 3 XC3S200-5FT256; VHDL design; Xilinx FPGA; digital FIR/CIC filters; digital decimation filter; sigma-delta modulator; two-step quantization; Delta-sigma modulation; Digital filters; Digital modulation; Field programmable gate arrays; Finite impulse response filter; Frequency; Hardware; Quantization; Sampling methods; Signal resolution;
Conference_Titel :
Mixed Design of Integrated Circuits and System, 2006. MIXDES 2006. Proceedings of the International Conference
Conference_Location :
Gdynia
Print_ISBN :
83-922632-2-7
DOI :
10.1109/MIXDES.2006.1706663
