IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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All-digital ramp waveform generator for two-step single-slope ADC
Tetsuya IizukaKunihiro Asada
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2011 Volume 8 Issue 1 Pages 20-25

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Abstract

This paper presents an all-digital on-chip ramp waveform generator for an 8-bit single-slope ADC. The proposed ramp waveform generator consists of static CMOS digital circuits and is designed using standard cells aiming for the process portability. The proposed circuit realizes digitally-controlled ramp output and also realizes two step coarse-fine ramp waveform to speed up the single-slope analog-to-digital conversion. The experimental results of the circuit simulation with random variation on 0.18µm CMOS process demonstrate the feasibility of our ramp waveform generator and 8-bit two-step single-slope ADC with DNL within ±0.2LSB and INL within ±0.8LSB.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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