Filter design tool

摘要

A method according to an embodiment of a filter design tool is provided and includes receiving filter parameters for an analog filter through a user interface, where the filter parameters include an optimization parameter related to an application requirement of the analog filter, optimizing the filter for the optimization parameter, calculating a design output based on the optimized filter, and displaying the design output on the user interface. The method can further include receiving viewing parameters that specify the design output to be displayed. In various embodiments, the user interface includes an input area, a viewing area and a window area in one or more pages, where the input area is contiguous to the viewing area in at least one page. The filter parameters can be entered in the input area and the design output is calculated and displayed in the contiguous viewing area substantially immediately.

主权项

1. A method implemented by a filter design tool on a computing device, comprising:
receiving filter parameters for an analog filter through a user interface, wherein the filter parameters include an optimization parameter related to an application requirement of the analog filter; optimizing the filter for the optimization parameter assuming an ideal operational amplifier in the filter; compensating the optimized filter for non-idealities in the operational amplifier, wherein the compensating comprises calculating a frequency range based on a type of filter, calculating a magnitude response of the optimized filter across the frequency range, optimizing the magnitude response of the optimized filter by varying a cutoff frequency and a Q-factor, and adjusting resistor and capacitor values based on the optimized magnitude response; calculating a design output of the compensated optimized filter; and displaying the design output on the user interface.