Title :
A low-power delta-sigma modulator using dynamic-source-follower integrators
Author :
Yaguchi, Ryoto ; Adachi, Fumiyuki ; Waho, Takao
Author_Institution :
Dept. of Electr. & Electron. Eng., Sophia Univ., Tokyo, Japan
Abstract :
A novel low-power switched-capacitor integrator based on dynamic-source-follower amplifiers is proposed and applied to a 2nd-order ΔΣ modulator. Circuit simulation assuming 0.18-μm CMOS technology shows that the present integrator can drastically reduce the power dissipation compared with conventional op-amp-based integrators. A figure-of-merit (FOM) of 0.172 pJ/conv·step has been predicted with a bandwidth and an SNDR of 20 kHz and 73.8dB, respectively.
Keywords :
CMOS digital integrated circuits; circuit simulation; delta-sigma modulation; low-power electronics; operational amplifiers; switched capacitor networks; 2nd-order ΔΣ modulator; CMOS technology; circuit simulation; dynamic-source-follower amplifiers; dynamic-source-follower integrators; figure-of-merit; low-power delta-sigma modulator; op-amp-based integrators; size 0.18 mum; switched-capacitor integrator; Bandwidth; Switches; analog-todigital converter; delta-sigma modulator; integrator; switched-capacitor;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724571
