An Ultra Low Power CMOS Sigma Delta ADC Modulator for System-On-Chip (SoC) Micro-Electromechanical Systems (MEMS) Sensors for Aerospace Applications

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Abstract

This paper presents the design and implementation of an ultra-low power CMOS sigma-delta analog- to-digital converter (ADC) modulator specifically tailored for System-on-Chip (SoC) micro- electromechanical systems (MEMS) sensors utilized in aerospace applications. The proposed ADC modulator aims to address the stringent power constraints while maintaining high-resolution and accuracy requirements for the acquisition of sensor data. The proposed ADC modulator leverages the sigma-delta modulation technique, known for its effectiveness in achieving high resolution with low- power consumption. The design focuses on minimizing power consumption by employing innovative circuit architectures, low-voltage supply, and reduced transistor sizes. This design incorporates the utilization of 180nm technology, resulting in an average power consumption of 54 µW when operated at a sampling frequency of 50 MHz It efficiently operates within a narrow power supply range of +1.3V to -1.3V.

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Keywords

Clocked comparator; CMOS; DAC;D flip flop; Integrator; Op-amp; Signal to Noise Ratio (SNR)