title: An ultra-low-power filtering technique for biomedical applications.
abstract: This paper describes an ultra-low-power filtering technique for biomedical applications designated as T-wave sensing in heart-activities detection systems. The topology is based on a source-follower-based Biquad operating in the sub-threshold region. With the intrinsic advantages of simplicity and high linearity of the source-follower, ultra-low-cutoff filtering can be achieved, simultaneously with ultra low power and good linearity. An 8(th)-order 2.4-Hz lowpass filter design example optimized in a 0.35-μm CMOS process was designed achieving over 85-dB dynamic range, 74-dB stopband attenuation and consuming only 0.36 nW at a 3-V supply.
authors.affiliation: Biomedical Engineering Laboratory, FST and State-Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macao, China.
authors.forename: Tan-Tan
authors.initials: TT
authors.lastname: Zhang
authors.forename: Pui-In
authors.initials: PI
authors.lastname: Mak
authors.forename: Mang-I
authors.initials: MI
authors.lastname: Vai
authors.forename: Peng-Un
authors.initials: PU
authors.lastname: Mak
authors.forename: Feng
authors.initials: F
authors.lastname: Wan
authors.forename: R P
authors.initials: RP
authors.lastname: Martins
mesh_terms: D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D011211:Electric Power Supplies; D004562:Electrocardiography / Q000295:instrumentation*; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity