Essential Information & explanations, latest texts & monographs on Crystal_filter.


Interim report to the National Aeronautics and Space Administration, Marshall Space Flight Center on Wavelength-tunable liquid crystal imaging filters for remote sens by Peter Foukal

Modern crystal & mechanical filters by IEEE Press

Modern Crystal and Mechanical Filters by Desmond Sheahan

Crystal Filters: Design, Manufacture, and Application by Robert G. Kinsman

Precision Frequency Control: Acoustic Resonators and Filters by Eduard A. Gerber

The Hy-Q Handbook of Quartz Crystal Devices by David Salt

The Froehlich/Kent Encyclopedia of Telecommunications: Crystal and Ceramic Filters to Digital-Loop Carrier by Fritz E. Froehlich


Crystal filter

A Crystal Filter is a special form of quartz crystal used in electronics systems, in particular communications devices. It provides a very precisely defined centre frequency and very steep bandpass characteristics, that is a very high Q factor - far higher than can be obtained with conventional lumped circuits. A crystal filter is very often found in the IF stages of high-quality radio receivers. Cheaper sets may use ceramic filters (which also exploit the piezoelectric effect), or tuned circuits. The use of a fixed IF frequency allows a crystal filter to be used because it has a very precise fixed frequency.
The above article is adapted from from Wikipedia All Wikipedia article text is available under the terms of the GNU Free Documentation License

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Note again ... some material here is adapted from from Wikipedia All Wikipedia article text is available under the terms of the GNU Free Documentation License

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