Discussion
A crystal oscillator using the crystal as the inductor of a Colpitts is called a ______ oscillator.
Answer: C
This is the Pierce arrangement, and it is what sits inside almost every microcontroller clock. The Clapp is a Colpitts with an extra series capacitor, the Armstrong uses transformer feedback, and the Wien bridge is an RC audio topology. Three of these are variations on one LC arrangement, so learning the Colpitts thoroughly gives most of the family with one substitution each.
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