An ultra low-power class-AB sinh integrator

Authors:
Sandro A. P. Haddad;Wouter A. Serdijn
Affiliations:
Delft University of Technology, Delft, The Netherlands;Delft University of Technology, Delft, The Netherlands
Venue:
SBCCI '06 Proceedings of the 19th annual symposium on Integrated circuits and systems design
Year:
2006

Citing 1
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Abstract

A new ultra low-power Class-AB Sinh integrator is proposed here. The translinear companding integrator is based on hyperbolic-sine transconductors and uses only one grounded capacitor to implement a Class-AB integrator, which saves considerable chip area. Furthermore, the proposed circuit presents excellent performance with respect to power efficiency. To validate the circuit principle, the integrator has been simulated in standard 35 μm CMOS technology and designed to operate from a 1.5-V (± 0.75V) supply voltage, with a current consumption of only 14nA. The THD is kept below 1%, with a modulation index as high as 20 and yields a 75-dB dynamic range at the 1-dB compression point.