function generator - diy

[Albertum]

hi, I would like make a function generator. I am looking for a circuit diagram and a help about components. Any idea?

[electrohebdo]

First, you need to specify what you need - functions, frequency range ... In the past were produced several IC's for functions generators. I think the best was Maxim 038. This IC generates sine, square and triangle. Max. frequency was theoretically 20 MHz, really 16 MHz. Unfortunately, Maxim 038 is no more available. The China sellers on eBay offer only fakes. The China's fakes have many various problems, like limited frequency range or poor linearity, noise, etc etc.
Another way how to make function generator is to use classical operational amplifiers

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[Albertum]

hi, thank you. Can you suggest a schematics for function generator with OpAmps?