overtone crystal

overtone crystal

[′ō·vər‚tōn ‚krist·əl]
(electronics)
Quartz crystal cut in such a manner that it will operate at a higher order than its fundamental frequency, or operate at two frequencies simultaneously as in a synthesizer.
References in periodicals archive ?
[6] MinQiang Li, XianHe Huang, Feng Tan, YanHong Fan and Xun Liang, "A novel microcomputer temperature-compensating method for an overtone crystal oscillator," in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol.
The oscillator provides a lifetime stability of [+ or -]25 ppm for all conditions over -40 [degrees]C to +85 [degrees]C and touts an RMS jitter of <1 ps (12 kHz to 20 MHz) by using a 3rd overtone crystal design.
(3.) Bartram, C., "Notes on the Driscoll VHF Overtone Crystal Oscillator and a New Low-Noise VHF Crystal Oscillator Topology," http://www.christopherbartramrfdesign.com/blaenffos/oscillator/VLNO.pdf
From 106.25 MHz to 170 MHz, this was accomplished two ways, the least expensive of which was using a third overtone crystal. The other was the advent of inverted mesa fundamental crystals.