DocumentCode :
2229963
Title :
Design of multiplier free FIR filters using a LADF sigma-delta (Σ-Δ) modulator
Author :
Abeysekera, Saman S. ; Padhi, Kabi Prakash
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Volume :
2
fYear :
2000
fDate :
2000
Firstpage :
65
Abstract :
Sigma-delta (Σ-Δ) modulators have been widely used over the last few decades, and one of their many applications has been in the field of FIR filter design. In this paper, we investigate the performance of multiplier free FIR filter design using the Look Ahead Decision Feedback (LADF) Σ-Δ architecture. The LADF Σ-Δ architecture, which has not been used in FIR filter design before, is compared with other conventional Σ-Δ architectures. It is shown that the LADF architecture has relatively low noise power at low frequencies and is preferable over the other modulators in the design of multiplier free FIR filters. The selection of demodulator filters for reducing quantization noise due to the LADF Σ-Δ architecture is also addressed in the paper. Using low-pass FIR filter design examples, the appropriate filter design methodology is presented in the paper
Keywords :
FIR filters; circuit feedback; circuit noise; digital filters; interference suppression; interpolation; low-pass filters; modulators; sigma-delta modulation; FIR filter design; LADF Σ-Δ architecture; LADF Σ-Δ modulator; demodulator filter selection; filter design methodology; look ahead decision feedback Σ-Δ architecture; low-pass FIR filter; multiplier free FIR filters; quantization noise reduction; sigma-delta modulator; Circuits; Delta modulation; Delta-sigma modulation; Feedback; Finite impulse response filter; Hardware; Low-frequency noise; Quantization; Signal processing; Signal resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
Type :
conf
DOI :
10.1109/ISCAS.2000.856259
Filename :
856259
Link To Document :
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