Abstract
AbstractThis letter presents a low‐power single‐slope analog‐to‐digital converter (ADC) for column‐parallel architectures. A simple and effective design technique is proposed to solve the input‐dependent power consumption problem of the conventional single‐slope ADCs. A decision‐feedback loop is implemented in the second stage of the comparator. Based on the negative‐feedback path, which is activated after the signal decision of the comparator, the input‐dependent dynamic current path in the amplifier is disabled. Furthermore, an additional low‐power design technique is proposed to save the power consumption of the ADC by optimizing the offset cancelling auto‐zero period. With the combination of the proposed techniques, the power consumption of the single‐slope ADC can be effectively saved while suppressing the dynamic current.
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