Title :
A compact CMOS Class-AB analog median filter
Author :
Muñiz-Montero, Carlos ; Salinas, Marco Antonio Ramírez- ; Villa-Vargas, Luis Alfonso ; Lozano, Herón Molina- ; Ponce-Ponce, Víctor Hugo ; Sánchez-Gaspariano, Luis Abraham ; Arellano-Gutiérrez, David
Author_Institution :
Center for Res. in Comput., Nat. Polytech. Inst., Mexico City, Mexico
Abstract :
A power efficient implementation of a CMOS Class-AB analog median filter is presented. The median detector is based on transconductance comparators accomplished with new Differential Flipped Voltage Followers. The followers employ a current comparator to switch-on an auxiliary transistor to drive additional current whenever it is required, performing Class-AB operation. Area is saved by taking advantage of the large impedance node of the current comparator to accomplish Miller frequency compensation. Simulation results using the ON-SEMI 0.5 μm technology parameters validate the proposed structure.
Keywords :
CMOS analogue integrated circuits; comparators (circuits); differential amplifiers; median filters; operational amplifiers; Miller frequency compensation; ON-SEMI technology parameters; auxiliary transistor; compact CMOS Class-AB analog median filter; current comparator; differential flipped voltage followers; impedance node; median detector; size 0.5 mum; transconductance comparators; CMOS integrated circuits; Detectors; Digital filters; Impedance; Transistors;
Conference_Titel :
Circuits and Systems (LASCAS), 2012 IEEE Third Latin American Symposium on
Conference_Location :
Playa del Carmen
Print_ISBN :
978-1-4673-1207-3
DOI :
10.1109/LASCAS.2012.6180343
