Title :
Programmable IIR bitstream filters
Author :
Fernandes, L. ; Leme, C. Azeredo ; Franca, J.
Author_Institution :
Gropo de Circuitos e Sistemas Integrados, Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
This paper presents a compact realization of cascaded biquad digital filters using 2nd order ΔΣ modulators to avoid the need for multibit multipliers. A bit stream biquad is derived with just one ΔΣ modulator for each pair of poles with no significant degradation of sensitivity nor of dynamic range. The proposed structure leads to a straightforward programmable implementation due to its compactness and modularity
Keywords :
IIR filters; biquadratic filters; cascade networks; programmable filters; sigma-delta modulation; cascaded biquad digital filters; compactness; dynamic range; modularity; poles; programmable IIR bitstream filters; second order ΔΣ modulators; sensitivity; Circuits; Degradation; Delay; Delta modulation; Digital filters; Digital modulation; Dynamic range; Filtering; Frequency; IIR filters; Multiplexing; Sampling methods;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.504504
