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Introduction to quartz technology
Piezoelectric materials, especially quartz , have the property to transform electrical energy into mechanical energy and vice versa. In technical applications this effect is utilised by applying an alternating electrical field, which will cause the material to vibrate and subsequently resonate mechanically...
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Introduction to quartz oscillator technology
Crystals and Crystal Oscillators are the most important components for frequency control applications like telecommunication and data transmission. The reasons are high frequency stability, high quality factor of the resonance, low temperature drift and reasonable prices. The wide range of crystal oscillators requires exact specification to ensure optimal performance...
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Introduction to filter technology
KVG provides a wide spectrum of standard and custom specific filters for telecommunication, navigation, avionics and precise measurement for filters in the frequency range of 1 MHz to 200 MHz. In house filter design and crystal manufacturing combined with new technologies like HFF-crystals gives a maximum of flexibility to the customer...
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Further links for more information:
IEEE Frequency control page

http://www.ieee-uffc.org/fcmain.asp

Comprehensive UMTS page

http://www.umts-report.com

National Institute of Standard and Technology

http://tf.nist.gov/phase/Properties/main.htm

IEEE Tutorials

http://www.ieee-uffc.org/index.asp?page=freqcontrol/fc_reference.html&part=5#tutor