Title: Design of resolution adaptive TIQ flash ADC using AMS 0.35 µm technology

Authors: G. Rajashekar, M.S. Bhat

Addresses: Department of Electronics and Communication Engineering, NITK Surathkal, Srinivasanagar – 575025, Karnataka, India. ' Department of Electronics and Communication Engineering, NITK Surathkal, Srinivasanagar – 575025, Karnataka, India

Abstract: This 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 μm CMOS technology and 3.3 V power supply voltage and a prototype chip is fabricated. Simulation results and test results are presented.

Keywords: digital comparators; flash analogue-to-digital converter; flash ADC; threshold inverter quantisation; TIQ; simulation.

DOI: 10.1504/IJICT.2009.026426

International Journal of Information and Communication Technology, 2009 Vol.2 No.1/2, pp.19 - 30

Published online: 11 Jun 2009 *

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