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The Evolution of the Crystal Oscillator There is a large market for quartz crystal devices and it is a booming industry. Crystals are used in so many gadgets and even telecommunications equipment. Crystals in the telecommunications industry was used as early as 1939 by the U.S. Army. The use of crystals led to the development of radio communication. With that was happening all around the world at that time, the radio communication industry flourished. The growth of the industry was crippled by the shortage of quartz at that time. Because of technology, oscillator packages are now smaller and more stable. Although there is progress in the way oscillator packages are, their manufacturing process remains the same. Crystals undergo a meticulous process in order to produce new frequencies.
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In the 1990’s, there were some developments in the manufacturing process of programmable oscillators but it was never followed through. There wasn’t a significant change caused by these developments.
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In order to create a new frequency, a new crystal is needed for each frequency created. Because of the need to use so many crystals, there is a wide selection of electronic units that use these crystal frequencies today. The varying needs of cutting quartz causes many different changes in temperature and frequency stabilities. There is a need to cut the crystal with varying levels of thickness and varying angles for each frequency created. A tour of a crystal oscillator factory can show you the immense amount of crystals being used in production. Most often, the crystal oscillator industry is a build-to-order one. The demand of quartz in the industry and the need for it for various products has made the development in production quite a feat. To maximize time, there are now hybrid oscillators being used. The “raw” devices are converted so as to adhere to customer preferences. Thus, there is a few weeks lead time needed to come up with an order. Because of better technology, orders can be made in a much shorter time. The combination of a device’s temperature and its oscillator frequency is called the temperature stability. A device would usually have a temperature sensor that would adjust to a temperature change. Changes in frequency happen over long periods of use. Frequency stability is required to account for this effect called aging. A very reliable packaging for the crystal is needed for quartz oscillators. This packaging is needed to prevent leaks from damaging the oscillator which impede it from functioning properly. To make sure leaks don’t happen, a good seal is needed. Shock and vibration are things to look out for in quartz oscillators. The oscillator has to be built a specific way to reduce or prevent shock and vibration. Easy connectivity over large ranges can be provided for by a buffer. Taking care to know the details about crystal oscillators is favorable in knowing which oscillators are good to use.
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