hi everyone i have to design a colpitts oscillator (f = 4MHZ), the circuit is this. The output waveform is good but there are no 170n inductors that can be mounted on a board to test the circuit. I decreased the capacitance value to raise the inductance value but the output is no longer sinusoidal. The output signal from the hits I use to generate a square wave. I thought of using a pierce circuit (colpittz with crystal), maybe the waveform is better, I know that the crystal goes in place of the inductance but I tried to mount it and the circuit doesn't work, I have to adopt other arcongimenti to put the crystal? Which ? thank you all!!
(the first circuit is with the inductance at 170n the other has been scaled for an inductance value that can be mounted on a breadboard but waveform is not sinusoidal)
(the first circuit is with the inductance at 170n the other has been scaled for an inductance value that can be mounted on a breadboard but waveform is not sinusoidal)
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