Design of an 8-bit Incremental ADC
Xinlong Cai, Ze Chen and Zehong Cao
American Journal of Engineering and Applied Sciences
This technical report demonstrated a design an 8-bit switched-capacitor incremental ADC in UMC 0.13 μm CMOS. The design requirements are Supply voltage: 1.2V, Reference voltage (Vref): 1V, Resolution: 8 bits, Output data rate: 100 samples per second and Input voltage range: 0V to 1V. Furthermore, the determine the architecture of incremental A/D converter involved in fuzzy theory. The output waveforms of the clock generator plot with a proper time scale. In the result, we showed the digital outputs and plot the waveforms at the comparator’s output for three DC input values: One near 0V, one near Vref/2 and one near Vref. The exact DC values give the offset and gain errors of proposed circuit, supported by simulation results. We also simulated the DNL and INL using a histogram method and give the plots of the DNL and INL of the ADC for all output. Finally, we conclude the case report with a discussion of results (comparison, problems, solution, possible improvements, etc.).
© 2018 Xinlong Cai, Ze Chen and Zehong Cao. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.