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Inside Frequency Control

What are GPS Disciplined Oscillators (GPSDO)?

Posted by Rob Rutkowski on Mar 19, 2019 9:26:00 AM

GPS Disciplined Oscillators (GPSDO) are one of today's most trusted and accurate sources of timing.  These powerful devices (sometimes called GPS clocks) consist of a high-quality stable oscillator and a GPS receiver. The GPSDO works by disciplining (or steering) the oscillator output to a GPS device or GNSS satellite signal via a tracking loop.

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Topics: crystal oscillators, RF Technology, GPS & GNSS, Integrated RF, Defense & PNT

Searching for the Perfect Crystal Oscillator? Ask These 4 Key Questions

Posted by Rob Rutkowski on Feb 27, 2019 9:36:00 AM

The harsh truth is, selecting the wrong quartz crystal oscillator can quickly kill any design. With the wide variety of options and specs available in the market today, selecting the perfect crystal oscillator for your design can be a difficult and time consuming task.

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Topics: crystal oscillators

4 Hidden Mysteries of Quartz Crystal Oscillators

Posted by Rob Rutkowski on Feb 12, 2019 9:04:00 AM

 

The development of crystal oscillators has literally changed the world. Technically that can (and is) said about many things. But think about it! Without crystal oscillators, we may have never seen precision timing in clocks, wide and clear radio broadcasts, or important communication methods within military and space programs.

Imagine how different our world might be without these now commonplace technologies. 

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Topics: crystal oscillators

Communication With Aliens - Interstellar Messages in Deep Space

Posted by Rob Rutkowski on Jun 5, 2018 7:50:00 AM

We can't possibly be the only intelligent life-forms in this infinite universe, can we? I mean, there's still plenty of exploring to do in our own solar system let alone nearby stars, our entire galaxy, and surrounding galaxies. Will our current deep space communication efforts, like Voyager 1, ever stumble across alien life so us humans can say, "Hi! We're here!"? Or will it take so long that our messages would be more like, "Hi! We were here!"? 

Let's explore some current communication efforts to make contact with aliens and how they work.

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Topics: crystal oscillators, Space & Satellites

PARC - A Hub of Innovation

Posted by Bliley Technologies on Apr 10, 2018 7:46:00 AM

Bliley Technologies is proud to be partnered with PARC, the Palo Alto Research Center, a leading hub of innovation in a wide range of cutting-edge 21st-century technologies. PARC has deep expertise in the high-tech fields of big data, optoelectronics, semiconductors, large area electronics, model-based reasoning for AI, and is a pioneer in the field of ubiquitous and context-aware computing.

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Topics: crystal oscillators, general

How OCXOs Establish Precise Frequency Control

Posted by Bliley Technologies on Apr 3, 2018 6:30:00 AM

RF engineers are aware that temperature variations are the most significant factor contributing to frequency drift in crystal oscillators. Other variables affecting frequency output, such as humidity and pressure, can be easily alleviated with a hermetically sealed packaging of the crystal in a vacuum, or in an inert gas such as nitrogen. Controlling temperature for precise frequency output in a crystal oscillator circuit, however, requires a higher level of electronic RF design ingenuity. Enter... The Oven Controlled Crystal Oscillator (OCXO).

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Topics: crystal oscillators, RF Technology

🎊🎉 Press Release: Bliley Announces NE❌T Generation Oscillators 🎊🎉

Posted by Bliley Technologies on Apr 1, 2018 8:00:00 AM
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Topics: Leadership, Press Release, crystal oscillators, general

How to Prevent Activity Dips and Frequency Perturbations in Crystal Oscillators

Posted by Rob Rutkowski on Nov 16, 2017 8:10:00 AM

Activity dips, also referred to as frequency perturbations, can be difficult to spot in oscillating crystals. However, a single activity dip can cause major problems in an application’s signal, including within GPS or missile systems. Imagine launching a missile and then losing control of its navigation. Or getting a very inaccurate GPS velocity reading of an aircraft. These (and many other problems) can be caused by a failure to spot frequency dips in crystals. It’s important to understand what activity dips are and how to avoid them from occurring in crystals...and that's exactly what you're going to learn right now!

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Topics: crystal oscillators

The TCXO Performance Guide (Plus 4 Common Types)

Posted by Rob Rutkowski on Oct 13, 2017 10:47:46 AM

TCXO Performance Qualities

A standard TCXO has quite a few performance qualities. Some of the most common performance figures are summarized below:

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Topics: crystal oscillators

Could an Accidentally Shattered Quartz Crystal Lead to the "Impossible"?

Posted by Charles Bliley on Sep 27, 2017 8:20:00 AM

 

While looking through the Bliley archives for material to write about for this new installment of Stories From The Bliley Vault, I discovered a very interesting set of two letters— one from a minister in South Africa from 1936 and another from an Army Colonel in 1942.

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Topics: crystal oscillators