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Frequency control developments

AUG 01, 1966

With understanding of energy trapping, vibration theory is reducing crystal‐filter design to handbook form. Masers and beam tubes too are enjoying developments giving frequency stabilities of one part in

10^{14} .

DOI: 10.1063/1.3048406

Arthur D. Ballato

Robert V. McKnight

CRYSTAL VIBRATORS and atomic frequency standards are continuing to attract the interest of engineers and physicists. In particular, the energy‐trapping concept has assisted in the application of theory to practical quartz resonators. Thus filter crystals have been extended to 125 MHz. Similarly, multiple‐mode resonators of piezoelectric ceramic and quartz can now be made on a single crystal wafer, making possible a filter in a monolithic integrated form. Crystal oscillators, too, have been made, in which the crystal serves both as a control element and as an active device.

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More about the authors

Arthur D. Ballato, Fort Monmouth, New Jersey.

Robert V. McKnight, Fort Monmouth, New Jersey.

© 1966 American Institute of Physics

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This Content Appeared In

Volume 19, Number 8

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