Low Temperature Quartz Crystal Oscillator Fast Warm-Up Saw Oscillator.

reportActive / Technical Report | Accession Number: ADA104403 | Open PDF

Abstract:

The objectives of this program are to Evaluate the frequency instabilities of quartz crystal resonators as a function of temperature and Q-factors Show the feasibility of low temperature quartz oscillators and Determine the dynamic thermal behavior of SAW quartz oscillators and precise crystal orientation and wave propagation direction with minimized sensitivities. The measurements of the frequency noise of different quartz resonators at room temperature show a correlation between 1f noise levels and Q-factors, following 1Q to the 4th power law. This new property was confirmed by measuring the 1f noise level of a pair of resonators at 300 K, 4.2 K and 1 K. A first theoretical study enables to explain the 1Q to the 4th power law from the phonon-phonon interactions due to the crystal anharmonicities. Under fast temperature variations frequency shifts are observed in SAW delay lines, which are proportional to the time derivative of the temperature. This dynamic thermal behavior was evaluated for ST cut quartz and found comparable to that one of AT-cut quartz BAW resonators. Therefore such a thermal sensitivity is not admissible for fast warm-up oscillator applications and must be lowered. Author

Author(s):
Gagnepain, J. J. ; Hauden, D.
Author Organization(s):
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE BESANCON (FRANCE)
Descriptive Note:
Interim rept. 1 Feb 80-31 Jan 81,
Pagination:
0040

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RADC-TR-81-184
Contract/Grant Number(s):
AFOSR-80-0105
Task Number(s):
J1
Project Number(s):
2305
Monitor Series:
TR-81-184
 Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.1.1_Wired Transmission; JCA_6.1_Information Transport; JCA_6.3.3_Spectrum Management; JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.3_Net Management; JCA_1_Force Support; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics; Quantum Science and Computing
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ACOUSTIC WAVES, *QUARTZ RESONATORS, *CRYSTAL OSCILLATORS, THERMAL PROPERTIES, LOW TEMPERATURE, STABILITY, SURFACE WAVES, FEASIBILITY STUDIES, FRANCE, NOISE(RADIO), Q FACTOR, FREQUENCY SHIFT
Field(s)/Group(s):
Line, Surface and Bulk Acoustic Wave Devices, Test Facilities, Equipment and Methods, Acoustics
Keyword(s):
Surface acoustic wave devices, Landau Rumer theory, WURADC2305J133, PE61102F
Report Date:
1981 Jul 01