2019 · 16 citations · 0 references
EngineeringComputer EngineeringElectrical EngineeringAnalog ElectronicsDigital CommunicationMicroelectronicsAnalog Integrated CircuitsCmos Circuit DesignDigital Signal ProcessingLow-noise Circuit DesignMixed-signal Integrated Circuit DesignRadio-frequency Integrated CircuitsAnalog-to-digital ConversionCmos Analog Circuit DesignCmos Analog Integrated CircuitsFrequency SamplingQuantizationQuantization NoiseRf Cmos DesignWireless Communication Systems
This work presents a continuous-time delta-sigma modulator (CTDSM) using a time-interleaved noise-shaping quantizer targeted for wireless communication system application. A quantization error duplication method enables the SAR-based quantizer to implement noise-shaping and operate at an 832MHz sampling frequency concurrently. Through the use of a CRFB loop filter topology and the noise-shaping quantizer, the proposed CTDSM achieves 71.4 dB SNDR in 30-MHz BW without STF peaking. The FoMs and FoMw are 171 dB and 17.6 fJ/conv.-step, respectively.