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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 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...
This paper presents a novel noise shaping SAR architecture that is simple, robust and low power. It is fully passive and only needs minor modification to a conventional SAR ADC. Through a passive integrator, quantization noise, comparator noise and DAC noise are shaped with a noise transfer function of (1 − 0.75z−1). Unlike conventional multi-bit delta-sigma ADCs, both the noise transfer function...
The emerging compressive sensing (CS) theory states that the sparsity of a signal can be exploited to reduce the ADC conversion rate. However, most previous CS frameworks still require dedicated analog CS encoders in front-of low-rate ADCs. Differently, this work proposes a fully-passive CS framework that directly embeds CS into a conventional SAR ADC, reducing the ADC power by 4 times. A prototype...
The emerging compressive sensing (CS) theory states that the sparsity of a signal can be exploited to reduce the ADC conversion rate. However, most previous CS frameworks still require dedicated analog CS encoders in front-of low-rate ADCs. Differently, this work proposes a fully-passive CS framework that directly embeds CS into a conventional SAR ADC, reducing the ADC power by 4 times. A prototype...
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