A 23.9-μW 13.6-Bit Period Modulation-Based Capacitance-to-Digital Converter With Dynamic Current Mirror Front-End
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Abstract:
This letter proposes a low-power high-precision capacitance-to-digital converter (CDC) utilizing a dynamic current mirror (DCM) to transform a sensor input capacitance $(C_{\mathrm{ IN}})$ into an output current. The resulting current is directly proportional to the ratio of $C_{\mathrm{ IN}}$ to an internal reference capacitor $(C_{\mathrm {REF}})$ and …