Title :
Low-power duty-cycle tuned filters
Author :
Xin Meng ; Temes, Gabor C.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR, USA
Abstract :
Duty-cycle tuned switched-resistor-MOSFET-C filters can achieve excellent linearity and wide tuning range. In this letter, a switched-capacitor circuit is described which can provide the required bias voltage for the opamp, and relax the driving requirement of the previous block. Correlated double sampling circuit is also realized by the switched-capacitor circuit, to effectively suppress the offset voltage and flicker noise of the amplifier. Simulation results verify that 68dB DC offset voltage suppression could be achieved.
Keywords :
MOSFET; low-power electronics; operational amplifiers; switched capacitor networks; DC offset voltage suppression; amplifier flicker noise; block driving requirement; correlated double-sampling circuit; duty-cycle-tuned switched-resistor-MOSFET-C filters; low-power duty-cycle tuned filters; opamp bias voltage; switched-capacitor circuit; CDS; duty-cycle tuning; switched-R-MOSFET-C filter; switched-capacitor circuit;
Conference_Titel :
Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4799-4134-6
DOI :
10.1109/MWSCAS.2014.6908594
