Title :
A 0.35-1 V 0.2-3 GS/s 4-bit low-power flash ADC for a solar-powered wireless module
Author :
Lin, Ying-Zu ; Lien, Yu-Chang ; Chang, Soon-Jyh
Author_Institution :
Nat. Cheng-Kung Univ., Tainan, Taiwan
Abstract :
This paper reports a 4-bit flash ADC with a supply range from 0.35 to 1 V. The corresponding sampling rates are 0.2 to 3 GS/s. This low-voltage low-power ADC is a feasible building block for a solar-powered wireless module. Passive subtraction by resistor ladders replaces active subtraction by 4-input preamplifiers since the linearity of ladders is independent of supply voltage. Passive subtraction and low-threshold devices enable low-supply operation. At 1.2 GS/s, the ADC consumes 1.93 mW from a 0.6-V supply. The ENOB is 3.60 bit and ERBW is 550 MHz, resulting in an FOM of 145 fJ/conversion-step.
Keywords :
analogue-digital conversion; flash memories; low-power electronics; preamplifiers; low-power flash ADC; low-threshold devices; low-voltage ADC; passive subtraction; power 1.93 mW; preamplifiers; resistor ladders; solar-powered wireless module; storage capacity 4 bit; voltage 0.35 V to 1 V; Baseband; Low voltage; Photovoltaic cells; Power supplies; Preamplifiers; Radio frequency; Routing; Sampling methods; Transceivers; Wireless sensor networks;
Conference_Titel :
VLSI Design Automation and Test (VLSI-DAT), 2010 International Symposium on
Conference_Location :
Hsin Chu
Print_ISBN :
978-1-4244-5269-9
Electronic_ISBN :
978-1-4244-5271-2
DOI :
10.1109/VDAT.2010.5496748
