I need to pick component values for a colpitts crystal oscillator. Someone else picked the values for the oscillator shown in the attachment for a 12 MHz crystal. I want to use a 4 MHz crystal. I'm pretty sure C1, C5, R2, and R3 don't need to change. The values for Rm, Co, and CL come from the data sheet for the 4 MHz crystal. I'm not sure how to pick the values for the other components in the circuit.
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