IP개요 |
This paper proposes a reconfigurable sensor analog front-end using low noise chopper-stabilized delta-sigma capacitance-to-digital converter (CDC) for capacitive microsensors and temperature measurement. The proposed reconfigurable sensor analog front-end can drive both capacitive microsensors and voltage signals by direct conversion without a front-end amplifier. The reconfigurable scheme of the front end can be implemented in various multi-mode applications, where it is equipped with a fully integrated temperature sensor. A chopper stabilization technique is implemented here to achieve a low-noise characteristic by reducing unexpected low-frequency noises such as offsets and flicker noise. |