1.8 v Second Order Switched Flying Capacitor Integration based Sigma Delta Analog to Digital Convertor |
Author(s): |
| Soniya Chopady , Swami Vivekanand College of Engineering Indore ; Vijay Sharma, Swami Vivekanand College of Engineering Indore |
Keywords: |
| Starved Current Inverter, Cascading, Quantizer, Flying Switched Capacitor, Integrator & Sigma Delta Modulator |
Abstract |
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In this paper Op-amp based integrator has been replaced by the flying switched capacitor based integrator. Starved current inverter is used to design the comparator for quantize. Cascading is done to increase the gain of comparator. Starved current inverter reduces the power consumption of comparator. Flying capacitor integrator samples the data and holds for some time and during next pulse it transfer the charge and integrates. Capacitor along with the CMOS switch forms equivalent RC integrator. Switch resistor can be selected by proper selection of the MOS size. The design is simulated at 1.8 V power supply at 0.25 µm CMOS technology. Higher comparator gain of 2500 is achieved. SNR of sigma delta ADC is 74.4 dB. The ADC consumes 6.42 µW power at 1.8 V DC power supply. |
Other Details |
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Paper ID: IJSRDV6I50268 Published in: Volume : 6, Issue : 5 Publication Date: 01/08/2018 Page(s): 556-559 |
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