Abstract
In recent years, the lowing supply voltage and the A/D conversion accuracy are required for ΔΣA/D Conversion Circuits. We proposed MASH structure using the 2nd order swing-suppression A/D conversion circuit at previous research. We showed that this circuit is high accuracy and suitable at low supply voltage. However, the accuracy of this circuit is degraded by the analog device value deviation and the OP-AMP DC gain degradation. In this paper, we proposed the low voltage ADC using Sturdy-MASH (SMASH) constructure and the swing-suppression A/D conversion circuit. We realized the SNR of 86 dB with ±1% device value deviation and the OP-AMP DC gain of 40 dB.
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