In the circuit in the figure, we have the production of rectangular signals with frequencies of up to approximately 1 MHz. The oscillator in question has three outputs with characteristics that may be interesting for many projects. On pins 10 and 11 we have rectangular signals of the same frequency, but with inverted phases, while on pin 13 we have a rectangular signal with twice the frequency of the previous ones. The operating frequency depends on Rx and Cx and can be calculated using the formula in the diagram. Rx should not be less than 1 k ohms. This oscillator can be powered by voltages between 3 and 15 V and the maximum operating frequency, which depends on this voltage, is around 2 MHz for 12 V supply.

 


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