Rajashekar, G.Bhat, M.S.2026-02-052009International Journal of Information and Communication Technology, 2009, 2, 46054, pp. 19-3014666642https://doi.org/10.1504/IJICT.2009.026426https://idr.nitk.ac.in/handle/123456789/27687This paper presents a resolution adaptive flash A/D converter design and its performance. To achieve high speed, the proposed A/D converter utilises threshold inverter quantisation technique replacing conventional analogue comparators with digital comparators. The replacement results in a faster digital conversion and a reduction of the analogue nodes in the ADC. The proposed ADC is a true variable resolution ADC, operates at 3-bit, 4-bit, 5-bit and 6-bit precision depending on control inputs. The proposed ADC is designed with AMS 0.35 m CMOS technology and 3.3 V power supply voltage and a prototype chip is fabricated. Simulation results and test results are presented. Copyright © 2009, Inderscience Publishers.Comparator circuitsComparators (optical)Analogue to digital convertersCMOS technologyDigital comparatorsDigital conversionFLASH-ADCPower supply voltageQuantisationVariable resolutionAnalog to digital conversion