Convert square wave to saw tooth wave

Hi all
i need your help. I have a square wave data in for of an array. Can any one of you suggest me a method to convert this data into saw tooth data. What i mean is that i want to convert a square wave to a saw tooth wave with minimum value 0. Your help is really appriciated. Thanks in advance.
Chauhan.

Chauhan,
Let's continue discussion on your other post here.
David L.
Systems Engineering
National Instruments

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