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A 60-dB dynamic-range CMOS sixth-order 2.4-Hz low-pass filter for medical applications

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4 Author(s)
Solis-Bustos, S. ; Mexico Center for Semicond. Technol., Puebla, Mexico ; Silva-Martinez, J. ; Maloberti, F. ; Sanchez-Sinencio, E.

The design and implementation of a fully integrated complementary metal-oxide-semiconductor (CMOS) sixth-order 2.4 Hz low-pass fitter (LPF) for medical applications is presented. For the implementation of large-time constants both linearized operational transconductance amplifiers with reduced transconductance and impedance scalers schemes for grounded capacitors are employed. Experimental results for the filter have shown a dynamic range (DR) of 60 dB, while the harmonic distortion components are below -50 dB. The power consumption for the filter is below 10 μW, the power supply is ±1.5 V, and the active area is 1 mm2. The filter was fabricated in a double poly double metal 0.8 μm CMOS process

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Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:47 ,  Issue: 12 )