IC Resistor Geometry
Calculator
Calculator Usage
Specify the Desired Resistance
and Sheet Resistance and one of the following width input options may be
made:
1.
Specify 
in µm
The output will be the minimum
geometry ratio, divisible by in µm, that will produce a resistance closest to the specified Desired
Resistance.
2.
Specify Desired Width
The output will be the Desired
Width and length that will result in a resistor with the specified Desired
Resistance
3.
Specify in µm and Desired Width
The output will be a geometry,
divisible by in µm, that will produce a resistance closest to the specified Desired
Resistance. Where the width is the closest to the specified Desired Width
while still being divisible by in µm.
Regarding Calculations Made by the
Calculator
The
resistance of a resistor is given by the following formula:
Where
is the sheet resistance of your material, 
is the length of the resistor, and 
is the width of the resistor.