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Title of Journal: Analog Integr Circ Sig Process

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Abbravation: Analog Integrated Circuits and Signal Processing

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Springer US

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DOI

10.1007/s10470-016-0792-3

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1573-1979

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A 1V 6nW programmable 4thorder bandpass filter

Authors: Yuwadee Sundarasaradula Apinunt Thanachayanont
Publish Date: 2016/07/19
Volume: 89, Issue: 1, Pages: 89-98
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Abstract

This paper describes the design and realization of a programmable 4thorder GmC bandpass filter for biomedical applications The core 2ndorder filter stage is realized by a simple gyratorC active inductor structure with a single MOSFET as the transconductor element The capacitive input attenuation technique is used to enhance the linearity of the filter The proposed filter was designed and simulated with a 1V power supply voltage with process parameters from a standard 018 µm CMOS technology Postlayout simulation shows that the center frequency of the filter is adjustable from 80 Hz to 618 kHz by using a programmable bias current generator At a nominal center frequency of 945 Hz and the quality factor of 3 the filter exhibits a dynamic range of 576 dB and an inputreferred noise of 1742 µV The filter consumes only 6 nW from a 1V single power supply voltage and the active area of the overall circuit is 0088 mm2

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