Inside Frequency Control


Inside The VCXO: Performance and Applications

[fa icon="calendar'] Apr 6, 2017 6:42:00 AM / by Rob Rutkowski posted in crystals, RF

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Does your application require a super stable frequency source? How about the ability of the frequency source to be fine-tuned? Sounds like a Voltage Controlled Crystal Oscillators (VCXO) may be a great choice for your specific needs! By using a crystal oscillator as the basis of the circuit in a VCXO, high levels of frequency stability and low levels of phase noise can be maintained while still being able to control the frequency over a small range.

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Space-Proven Crystal Oscillators and Resonators

[fa icon="calendar'] Nov 15, 2016 6:30:00 AM / by Bliley Technologies posted in crystals, aerospace

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Welcome aboard! 

I'm about to take you on a journey through the deep, dark depths of outer space. Why? So you can get a feel for what crystal oscillators and resonators must endure while in the infinite world of darkness and wonder! First, you'll need to learn the important differences between crystal oscillators and resonators. After your mission is complete, you'll begin your journey to the depths of outer space from a resonator and oscillator perspective and learn their different roles and applications in space.

Enjoy your ride!

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Anatomy of an OCXO - Oven Controlled Crystal Oscillators

[fa icon="calendar'] Aug 9, 2016 11:14:23 AM / by Bliley Technologies posted in crystals, OCXO, engineering

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OCXOs 101
Oven Controlled Crystal Oscillator Basics

An OCXO or Oven controlled crystal oscillator is near the top of the food-chain when it comes to quartz based frequency control devices, superseded only by the mighty DOCXO or Double Oven!  The frequency output of a quartz oscillator is dependent on the temperature of the quartz crystal.  You can see in the figure below that temperature can have a significant impact on frequency of the oscillator.
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4 Ways to Improve Oscillator's Dynamic Phase Noise Performance

[fa icon="calendar'] Jul 19, 2016 10:34:02 AM / by Bliley Technologies posted in crystals, phase noise, aerospace, satcom, wireless, PNT, OCXO

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Can a Crystal Oscillator Operate Outside its Specified Temperature Range?

[fa icon="calendar'] Jul 12, 2016 8:30:00 AM / by Bliley Technologies posted in crystals, OCXO

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Understanding the Types of Crystals Inside of Your Oscillators

[fa icon="calendar'] May 30, 2016 7:00:00 AM / by Bliley Technologies posted in crystal aging, crystals, phase noise, OCXO

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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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Bliley Technologies introduces the BTI20160401 Kyber Crystal (non-weapon grade)

[fa icon="calendar'] May 9, 2016 3:00:30 PM / by Bliley Technologies posted in crystals, kyber crystal

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Erie, PA; April 1st, 2016 - The innovative engineers at Bliley Technologies have completed development of their next market changing product, the BTI20160401.  The BTI20160401 is a line of high-quality genuine quartz Kyber crystals.  Led by a team of some of the most experienced crystal engineers in the industry, the BTI20160401 represents "state-of-the-industry" in non-weapon grade Kyber crystals.
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Crystal Aging and A Counter-Intuitive Tip to Improve System Performance

[fa icon="calendar'] May 9, 2016 2:36:19 PM / by Bliley Technologies posted in crystal aging, crystals

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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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