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This paper presents a high dynamic range (DR) power-efficient voltage-controlled oscillator (VCO)-based continuous-time $\Delta \Sigma $ modulator. It introduces a robust and low-power fully-digital phase extended quantizer that doubles the VCO quantizer resolution compared to a conventional XOR-based phase detector. A tri-level resistor digital-to-analog converter is also introduced as complementary...
This paper presents a time-interleaved (TI) successive-approximation-register (SAR) ADC with a fast variance-based timing-skew calibration technique. It uses a single comparator-based window detector to calibrate the timing skew. It has low-hardware cost and 104 times faster convergence speed compared to prior variance-based timing skew calibration technique. The proposed technique brings collateral...
This paper presents a high dynamic range (DR), power efficient VCO-based continuous time ΔΣ modulator (CTDSM). It introduces a simple, robust and low power fully digital phase extended quantizer (PEQ) that doubles the VCO quantizer resolution compared to conventional XOR-based phase detector with minimum overhead. A tri-level resistor DAC is also introduced as complementary to the new quantizer, enabling...
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