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- W4386350733 abstract "This paper presents a low-power and constant-bandwidth analog front end (AFE) based on current-reused differential difference amplifier (DDA) for multi-biosignal acquisition. An adaptive biasing Gm-C low-pass filter (LPF) is proposed, which can adaptively adjust the bias current of the Gm unit according to the magnitude of different types of biosignal, achieving a constant bandwidth of the AFE to meet the requirement of different biosignal acquisition. To reduce the power consumption and area of the AFE, this paper proposes an instrumentation amplifier (IA) based on a current-reused DDA structure, which guarantees the input impedance without additional auxiliary circuits and adapts to the electrode requirement of different biosignal. The circuit is implemented in 65 nm CMOS process and occupies a core area of 0.1 mm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> . The measured results show that the low-pass cut-off frequency is maintained at 250 Hz when the gain of the AFE is variable over the range of 39.7-71.8 dB, and the entire bandwidth remains constant. At 1 V supply voltage, the IA consumes only 2.5 μW and has an equivalent input impedance of 1.65 GΩ. The total input equivalent integrated noise over the range of 0.4-250 Hz is 1.87 μVrms. The proposed AFE has the ability to clearly acquire Electrocardiogram (ECG), Electroencephalography (EEG), and Electromyography (EMG) biosignal." @default.
- W4386350733 created "2023-09-02" @default.
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- W4386350733 date "2023-10-15" @default.
- W4386350733 modified "2023-10-18" @default.
- W4386350733 title "A Low-power and Constant-bandwidth Analog Front End Based on Current-Reused DDA for Multi-Biosignal Acquisition" @default.
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- W4386350733 doi "https://doi.org/10.1109/jsen.2023.3309392" @default.
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