Title :
Switched-capacitor recharging devices for VIS filters using fully differential operational amplifiers
Author_Institution :
UniversitÃ\xa0 di Pavia, Dipartimento di Elettronica, Pavia, Italy
Abstract :
A basic switched-capacitor recharging device is presented useful in voltage-inverter-switch filter implementations. A differential operational amplifier is used: there follows a simplified timing scheme, while insensitivities to parasitic capacitances can be ensured. An example of a fully differential third-order lowpass filter is given with numerical analysis of the possible mismatches in the values of the capacitors of the two signal paths.
Keywords :
active filters; low-pass filters; operational amplifiers; switched capacitor networks; differential operational amplifiers; differential third-order lowpass filter; mismatches; numerical analysis; parasitic capacitances; switched-capacitor recharging device; timing scheme; voltage-inverter-switch filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840159
