Inside Frequency Control

Understanding the Types of Crystals Inside of Your Oscillators

Posted by Bliley Technologies on May 30, 2016 7:00:00 AM

Comparing the differences between AT and SC crystals and their impact on oscillator performance.

Inside of every quartz oscillator is something called a crystal blank.  The crystal blank is the resonating element of the oscillator that when subjected to a voltage potential will begin to vibrate and oscillate at it’s "fundamental frequency.”  As you can probably imagine, the way that crystal blank is manufactured can have a significant impact on the oscillators performance.  One of the most impactful manufacturing steps to crystal, and therefore oscillator performance, is the orientation of the quartz when the crystal blank is cut.

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Topics: crystal aging, crystals, phase noise, OCXO

Crystal Aging and A Counter-Intuitive Tip to Improve System Performance

Posted by Bliley Technologies on May 9, 2016 2:36:19 PM
One of the most common configurations of a frequency control device or oscillator is one where the voltage is adjusted to maintain a frequency lock within the system. In these types of systems, frequency error related to the oscillator can have a detrimental effect on system performance. In the most extreme cases, it can actually result in complete system failure when a good frequency lock cannot be maintained.
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Topics: crystal aging, crystals

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