All-digital ramp waveform generator for two-step single-slope ADC

[摘要] References(5)Cited-By(1)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.

[学科分类] 电子、光学、磁材料

[关键词] analog-to-digital converter;single-slope ADC;ramp waveform generator;all-digital