Title :
Low-power design of low-voltage current-mode integrators for continuous-time ΣΔ modulators
Author :
Aboushady, Hassan ; Louerat, Marie-Minerve
Author_Institution :
Paris VI Univ., France
Abstract :
In this paper, we present a method to design low-power low-voltage current-mirror based integrators for continuous-time ΣΔ modulators. It is shown that, by proper biasing of the mirror transistors, very high modulation index can be achieved at low-voltage supply. Careful analysis of the current-mode integrator shows that there exists an optimum supply voltage for minimum power consumption. Simulation results show that proper choice of the supply voltage can reduce the power consumption of the integrator by 40%
Keywords :
current mirrors; current-mode circuits; integrating circuits; low-power electronics; sigma-delta modulation; biasing; continuous-time sigma-delta modulators; current-mirror based integrators; low-power design; low-voltage current-mode integrators; mirror transistors; modulation index; power consumption; Circuit simulation; Current mode circuits; Delta-sigma modulation; Design methodology; Energy consumption; Equations; MOSFETs; Mirrors; Switching circuits; Voltage;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921846
