Title :
Low-power ripple-free chopper amplifier with correlated double sampling de-chopping
Author :
Belloni, Massimiliano ; Bonizzoni, Edoardo ; Maloberti, Franco ; Fornasari, Andrea
Author_Institution :
Dept. of Electron., Univ. of Pavia, Pavia, Italy
fDate :
May 30 2010-June 2 2010
Abstract :
This paper presents a new solution to obtain a spurs-free high precision amplifier. The method involves input chopping and correlated double sampling signal de-chopping. The offset is removed by using DC coupling. The proposed method, verified with transistor level simulations, is applied to a rail-to-rail input amplifier with 187 dB DC gain and 13.7 μA current consumption.
Keywords :
choppers (circuits); coupled circuits; low-power electronics; operational amplifiers; signal sampling; DC coupling; correlated double sampling signal dechopping; current 13.7 muA; gain 187 dB; low-power ripple-free chopper amplifier; operational amplifiers; rail-to-rail input amplifier; spursfree high precision amplifier; transistor level simulation; Capacitors; Choppers; Energy consumption; Frequency; Gain; Low-frequency noise; Operational amplifiers; Rail to rail amplifiers; Sampling methods; Semiconductor optical amplifiers;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537462
