3-bit Flash A/D Converter (7 comparators required).

May 14th, 2015
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We have decided to design an one-step Flash converter. As shown in the schematic below, in this type of ADC the input signal is compared to the 2n nodes of resistors. At the output of the comparators, the sampled input value can be read in thermometer-code.

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3bit AdcDURRMANN AntoineGEAMBLU Clment4 AEI- INTRODUCTION ............................................................................................................................. 1 II- COMPARATORS: ........................................................................................................................... 2 1. SIMPLE COMPARATOR .................................................................................................................... 2 2. COMPLEX COMPARATOR ................................................................................................................ 3 III- VOLTAGE DIVIDER: .................................................................................................................. 5 1. WITH NMOS ................................................................................................................................. 5 2. WITH RESISTOR ............................................................................................................................. 6 IV- BUBBLE ERRORS. .................................................................................................................... 7 V- FINAL DESIGN AND TESTS. ....................................................................................................... 12 VI- CONCLUSION.......................................................................................................................... 14 VII- BIBLIOGRAPHY .........................

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