Title :
A novel interpolator architecture for ΣΔ DACs
Author :
Francesconi, F. ; Lazzari, G. ; Liberali, V. ; Maloberti, F. ; Torelli, G.
Author_Institution :
Dept. of Electron., Univ. of Pavia, Italy
Abstract :
A scheme to implement Lagrange interpolation for Σ-Δ D/A (digital/analog) converters is presented. The proposed implementation requires only sums of digital signals, avoiding the use of generic multipliers. The circuit has a reduced complexity and is suitable for very high-frequency operation. The given analysis shows that the presented architecture has good performance both in the passband and in the stopband. The effects of finite digital word length are also discussed
Keywords :
digital-analogue conversion; interpolation; polynomials; sigma-delta modulation; ΣΔ DACs; Lagrange interpolation; Lagrange polynomials; finite digital word length; interpolator architecture; passband; reduced complexity; stopband; very high-frequency operation; Finite impulse response filter; Frequency response; Interpolation; Lagrangian functions; Polynomials; Time domain analysis;
Conference_Titel :
Design Automation, 1993, with the European Event in ASIC Design. Proceedings. [4th] European Conference on
Conference_Location :
Paris
Print_ISBN :
0-8186-3410-3
DOI :
10.1109/EDAC.1993.386468
