Temperature variations effects the crystal’s frequency stability; for this reason the oscillator circuit may well consist of a temperature compensation circuit to help keep the output frequency reliable throughout a wide temperature range. High-frequency crystals are generally cut in the shape of an easy rectangle or circular disk. Minimal-frequency crystals, https://singnalsocial.com/story4016176/helping-the-others-realize-the-advantages-of-smd-crystal-oscillators