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    0.5-V 16 nW Low-Pass Filter for Bio-Signal Applications
    (2024-01-01)
    Phatsornsiri, Punnavich
    ;
    Kumngern, Montree
    ;
    Khateb, Fabian
    ;
    Kulej, Tomasz
    ;
    Wongprommoon, Natapong
    This study presents a low-voltage, ultra-low power fully-differential low-pass filter for bio-signal applications using multiple-input fully differential operational transconductance amplifiers (MIFD OTA). This work shows that a low-pass filter using multiple-input OTA can reduce the number of OTAs and power consumption. The low-pass filter can be applied to biomedical signal processing applications. The low-pass filter was simulated using the 0.18 μm (CMOS) technology from TSMC with a supply voltage of 0.5 V. The simulation result shows that the filter has a static power consumption of 16 nW and a 140-Hz bandwidth when operating from a supply voltage of 0.5 V. Input frequency of 10 Hz with an amplitude of 220 mV, the new proposed filter provides a dynamic range of 72.2 dB, total harmonic distortion of 1 %.
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    Sub-Volt Bulk-Driven Transconductance Amplifier and Filter Application
    (2018-07-02)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    ;
    Yutthanaboon, Sathian
    ;
    Khateb, Fabian
    This paper describes a low-voltage and low-power transconductance amplifier and its application to third-order elliptic low-pass filter. The bulk-driven MOS transistor technique is used to provide low supply voltage operation and rail-To-rail input voltage common mode. The performance of the proposed filter is expressed through PSPICE simulators using TSMC 0.18 μm n-well CMOS process. Simulation results show that the filter using proposed circuit consumes 36 μW for power supply of a 0.5 V and has total harmonic distortion 1 % for input signal of 480 mVP-P.