next up previous contents
Next: File manipulation Up: Filter Analysis and Design Previous: Dynamic Range to Frequency   Contents


The integrators in the filter have to deliver currents to charge capacitors and drive the resistors in the filter network. Based on the state-space description of the network, the values of the capacitors, and the maximum signal voltage levels, FA can determine the maximum current that each integrator has to deliver. These currents are a function of frequency, and they can be plot through the command

plot: outputcurrents;
The maximum value of these currents over frequency determine the minimum output-stage bias currents of the integrators if they are biased in class A. FA determines these currents upon the command
output: bias;