IEEE Transactions on Biomedical Circuits and Systems · 2013 · 143 citations · 22 references
EngineeringBiomedical EngineeringElectrical EngineeringAnalog ElectronicsBiomedical Signal ProcessingLow-power DesignAnalog Integrated CircuitsBiomedical InstrumentationCmos Circuit DesignDigital Integrated CircuitsLow-power Digital Circuit DesignMixed-signal Integrated Circuit DesignAnalog-digital ConversionAnalog-to-digital ConversionAnalog-to-digital Converter DesignAnalog-to-digital ConvertersBiomedical ApplicationsCmos Analog Circuit DesignCmos Analog Integrated CircuitsPower Consumption
A continuous-time level-crossing analog-to-digital converter (LC-ADC) for biomedical applications is presented. When compared to uniform-sampling (US) ADCs LC-ADCs generate fewer samples for various sparse biomedical signals. Lower power consumption and reduced design complexity with respect to conventional LC-ADCs are achieved due to: 1) replacing the n-bit digital-to-analog converter (DAC) with a 1-bit DAC; 2) splitting the level-crossing detections; and 3) fixing the comparison window. Designed and implemented in 0.18 μm CMOS technology, the proposed ADC uses a chip area of 220 × 203 μm(2). Operating from a supply voltage of 0.8 V, the ADC consumes 313-582 nW from 5 Hz to 5 kHz and achieves an ENOB up to 7.9 bits.
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A new class of asynchronous A/D converters based on time quantization
E. Allier, Gilles Sicard, Laurent Fesquet et al. · 2003 · 210 citations
Engineering, Computer Engineering, Electrical Engineering +17