Discussion
How can an LC oscillator's temperature drift be reduced?
Answer: D
Choosing a capacitor whose capacitance rises with temperature to work with an inductor whose inductance falls lets the two drifts cancel in the product, and capacitors are made in a range of specified coefficients for exactly this purpose. A high quality factor improves stability against phase disturbances rather than against component drift, and gain and current affect amplitude. Cancelling two drifts against each other is cheaper than making either component stable, which is why the technique is standard.
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