Ultra high sensitivity, low power dual chopper signal conditioning circuit for integrated sensors
An ultra high sensitivity, low power dual chopper amplifier (DCA) for the signal conditioning of capacitive and voltage mode microelectromechanical systems (MEMS) transducers is presented. The input referred noise and input parasitic capacitance are minimized to increase the sensitivity for femto Farad range capacitive transducers. The circuit is designed in a 0.13 mm CMOS technology with a 1.2 V supply. The simulated power consumption is 8.4 mW, the gain is 47 dB, and the bandwidth is 10.5 kHz. The input referred capacitance noise floor is 0.0033 aF/Hz for a 100 fF capacitive sensor.
2016 14th IEEE International New Circuits and Systems Conference (NEWCAS)