Abstract :
A switched capacitor active integrator which realises long time constant values with low capacitance ratios is presented. The basic circuit implements a parasitic-insensitive capacitive charge division, which allows for accurate control of the equivalent time constant. The offset of the operational amplifier is reduced via a correlated-double-sampling operation, and the effect of the finite gain of the operational amplifier is also reduced with respect to classic integrators when a modified topology is used
Keywords :
active networks; integrating circuits; switched capacitor networks; accurate control; capacitance ratios; classic integrators; correlated-double-sampling operation; equivalent time constant; finite gain; modified topology; operational amplifier; parasitic-insensitive capacitive charge division; switched capacitor active integrator; time constant integrators;
