Crystal Oscillators Keep Time in LEOS Systems

June 12, 2019
A line of miniature hybrid crystal oscillators provides stable output frequencies to 162.5 MHz for various satellite systems.

The QT780 series of space-qualified hybrid crystal oscillators has been designed for use as the primary clocks in low-earth-orbit-satellite (LEOS) systems, small communications satellites, and broadcast satellites. These devices come in a broad range of operating frequencies, from 230 kHz to 162.5 MHz, in low-profile packages as small as measuring 5.0 × 7.0 mm and including surface-mount-technology (SMT) packages. The hybrid oscillators consist of a miniature strip quartz crystal and an IC operating at different supply voltages: 1.8, 2.5, 3.3, and 5.0 V dc. The sources include 50-krad total-ionization-dose radiation hardening and shock resistance to 20,000 g’s. They are available with optional screening to MIL-PRF-55310.

Q-Tech Corp., 10150 Jefferson Blvd., Culver City, CA 90232; (310) 836-7900, FAX: (310) 836-2157, E-mail: [email protected].

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.

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