DocumentCode :
3568760
Title :
A new mismatch-insensitive 1.5-bit MDAC with unity feedback-factor and enhanced performance
Author :
Pereira, Nuno ; Goes, Joao ; Rodrigues, Marco ; Faria, Pedro
Author_Institution :
Centre for Technol. & Syst. (CTS) - UMNOVA, Caparica, Portugal
fYear :
2014
Firstpage :
375
Lastpage :
378
Abstract :
In this paper a novel and mismatch-insensitive 1.5-bit MDAC is proposed. This circuit combines three main techniques that lead to a simulated reduction of the power dissipation of the order of 4 times, when compared to the conventional 1.5-bit MDAC circuit. Simulations also have shown that the proposed 1.5-bit MDAC is capable of achieving an SNDR of around 74 dB, i.e. compatible with 12 bits, corresponding to a 25 dB (4 bits) improvement when compared to the classic 1.5-bit MDAC. It is worth noticing that these results are achieved with a low gain, poor linearity and noisy residue amplifier, as all these innacuracies are cancelled thanks to the techniques employed.
Keywords :
digital-analogue conversion; quantisation (signal); switched capacitor networks; MDAC; multiplying digital-to-analog converter; power dissipation; unity feedback-factor; Analog-digital conversion; Capacitance; Capacitors; Gain; Linearity; Noise; Noise measurement; Mismatch-Insensitive; Pipeline ADCs; Unity feedback-factor; lossless bottom-plate sampling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on
Type :
conf
DOI :
10.1109/ICECS.2014.7050000
Filename :
7050000
Link To Document :
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