US 8,806,409 B2 · Filter design tool

Abstract

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.

Claims20

Dependent claims

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, comprising:
determining a starting resistor value based at least on the optimization parameter;
selecting an operational amplifier based at least on a calculated allowed range for gain bandwidth and the optimization parameter;
selecting suitable resistors and capacitors based at least on the optimization parameter;
and
determining a stage order based at least on the optimization parameter;
and
compensating the optimized filter for non-idealities of an operational amplifier in the filter.

6 more elements

Non-transitory computer readable media that includes instructions for execution, which when executed by a processor, is operable to perform operations 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, comprising:
determining a starting resistor value based at least on the optimization parameter;
selecting an operational amplifier based at least on a calculated allowed range for gain bandwidth and the optimization parameter;
selecting suitable resistors and capacitors based at least on the optimization parameter;
and
determining a stage order based at least on the optimization parameter;
compensating for non-idealities of an operational amplifier in the filter.

5 more elements

An apparatus, comprising:

a memory element for storing data;
and
a processor operable to execute instructions associated with the data, wherein the processor and the memory element cooperate, such that the apparatus is configured for:
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, comprising:
determining a starting resistor value based at least on the optimization parameter;
selecting an operational amplifier based at least on a calculated allowed range for gain bandwidth and the optimization parameter;
selecting suitable resistors and capacitors based at least on the optimization parameter;
and
determining a stage order based at least on the optimization parameter;
and
compensating for non-idealities of an operational amplifier in the filter.

9 more elements

Dependencies are inferred from the claim text.

Filter design tool

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Filter design tool

Life of this patent

Abstract

Claims20