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I have little experience regarding wave generating circuits. I am aware that there are various circuits that are able to create signals but i would like to know if there is a circuit that can output sinusoidal, square and triangle wave signals. Can you guys recommend one?

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  • \$\begingroup\$ The one that involves the single function generator IC. \$\endgroup\$ – Ignacio Vazquez-Abrams Mar 16 '15 at 1:16
  • \$\begingroup\$ Do you know the name of that IC ? \$\endgroup\$ – T.Nhan Mar 16 '15 at 1:18
  • \$\begingroup\$ What does "best" mean to you? We can't answer a question like this without knowing what your priorities are. \$\endgroup\$ – Dave Tweed Mar 16 '15 at 1:21
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    \$\begingroup\$ @T.Nhan: Start here: \$\endgroup\$ – EM Fields Mar 16 '15 at 1:38
  • \$\begingroup\$ well you already have your answer? what are you asking exactly then? i checked the pdf. \$\endgroup\$ – Alexander Sabiona Mar 16 '15 at 1:41
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There is a multitude of single-chip function generator chips. One of the oldest was the ICL8038 which was soon followed by the XR2206. I've used both and probably still have one or two units built many years ago using the 8038. Both of these are still available.

Modern equivalents include the MAX038, AD9835, AD5932

You can also build a fixed-frequency using a quad op-amp. This is configured in one of several similar configurations: an integrator followed by a Schmitt trigger, or a square-wave oscillator followed by several integrators.

You get a triangle wave if you integrate a square wave. You get an approximation of a sine wave if you integrate a triangle wave.

Google is your friend. Simply search out "function generator" or "function generator ic" and learn to your hearts' content. Then come back and ask questions.

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