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Low-power design of low-voltage current-mode integrators for continuous-time ΣΔ modulators

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2 Author(s)
Aboushady, H. ; Paris VI Univ., France ; Louerat, M.

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%

Published in:

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on  (Volume:1 )

Date of Conference:

6-9 May 2001

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