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Charge-pump based switched-capacitor integrator for ΔΣ modulators

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2 Author(s)
Nilchi, A. ; Edward S. Rogers Sr. Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada ; Johns, D.A.

A low power switched-capacitor (SC) integrator based on a capacitive charge-pump (CP) is proposed. The CP integrator circuit consumes approximately a quarter of the power of a conventional SC integrator while maintaining the same thermal noise performance. Power consumption of the CP integrator is analysed and compared with a conventional parasitic-insensitive integrator. Simulation results verifying the thermal noise and settling performance of the CP integrator are also provided.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 6 )