Resistance Pair Chooser

Goals

This utility helps designers of circuit involving voltage divider to choose a pair of resistors from a discrete set of values that best satisfy certain design equation.

Features

• User defined an arbitrary design equation in the form of "f(R1,R2)=target_value" where f(R1,R2) is an expression or function containing two resistive variables R1, R2.
• User can specify the constraints for R1, R2 in form of a logical expression.
• Standard resistance values come from one of the industry standards: EIA-6, EIA-12, EIA-24, EIA-48, EIA-96, or EIA-192.
• A number (set by the user) of resistance pairs are returned and sorted by the order of increasing error deviating from the target value.

The Applet and User's Guide

• Enter the design equation, such as the one used in a voltage regulator with adjustable output voltage
• Enter the constraint for the two resistors
• Choose the set of standard resistance values and change the range when necessary. Click "Refresh R Set" to view the available resistance values
• Set the number of choices to be returned, then click "Calculate"

Disclaimer

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