Low Voltage Micropower Log-Domain Filters

Authors: El-Masry E.I.; Wu J.

Source: Analog Integrated Circuits and Signal Processing, Volume 22, Numbers 2-3, March 2000 , pp. 209-220(12)

Publisher: Springer

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Abstract:

A design technique for low-voltage, micropower continuous-time filters implementing CMOS devices operating in weak inversion is presented. The basic building block is the CMOS log-domain integrator. The effects of the MOS device nonidealities on the integrator are investigated and verified by HSPICE simulations. A 5th-order Chebyshev lowpass ladder filter was designed and simulated. The filter operates with low supply voltage of 1.5 V to achieve a cutoff frequency tunable range of 100 Hz–100 kHz, and it has a power dissipation of 254 nW/pole at the cutoff frequency of 100 kHz. The filter was laid out using the 0.35-m mixed-mode polycide CMOS technology and occupies a die area of 0.04 mm^2 without the i/o pads

Keywords: low-voltage; low-power; log-domain; CMOS; filters; current-mode; translinear

Language: English

Document Type: Regular paper

Affiliations: 1: Electrical and Computer Engineering Department, DalTech, Dalhousie University, P. O. Box 1000, Halifax, Nova Scotia B3J 2X4, Canada

Publication date: 2000-03-01