IEEE Journal of Solid-State Circuits · 2009 · 21 citations · 17 references
EngineeringComputer EngineeringElectrical EngineeringAnalog ElectronicsDigital CommunicationMicroelectronicsAnalog Integrated CircuitsCmos Circuit DesignDigital Integrated Circuit DesignDigital Integrated CircuitsDigital Signal ProcessingMixed-signal Integrated Circuit DesignAnalog-digital ConversionAnalog-to-digital ConversionAnalog-to-digital ConvertersBandwidthCmos Analog Integrated CircuitsDynamic RangeQuantization NoiseSaturation
A second order sigma delta modulator (SDM) with a 5-bit quantizer has been presented using several novel techniques: simplified DAC arrays for easy implementation, high-order truncation noise shaping for increased tolerance to analog imperfections, and an extended dynamic range for a maximum input signal swing of up to -0.12 dB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">FS</sub> (Full Scale). With truncation filters and a pseudo SDM in the DSP, the truncation and saturation errors are compensated through the DAC arrays and the DSP. The design, fabricated in a 0.18 mum dual gate oxide (DGO) process obtains a signal-to-noise-and-distortion ratio (SNDR) of 105.9 dB and a dynamic range (DR) of 107.4 dB with 31.25-KHz bandwidth at an 8-MHz sampling frequency and a power consumption of 14.7 mW.
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A 12-bit intrinsic accuracy high-speed CMOS DAC
J. Bastos, A. Marques, Michiel Steyaert et al. · IEEE Journal of Solid-State Circuits · 1998 · 313 citations