Accession Number : AD0761101

Title :   Precision Single Sideband Crystal Units.

Descriptive Note : Final rept. 15 Dec 71-31 Jan 73,

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : Hart,Raymond K. ; Hicklin,W. H.

Report Date : MAY 1973

Pagination or Media Count : 80

Abstract : IDEBAND (SSB) quartz crystal units which exhibit long-term aging of < plus or minus 2x10 to the minus 10th power /week when measured at the upper turning point (UTP) of 62C, and after a stabilization period of four weeks. In addition to the low aging requirement, the frequency hysteresis that often occurs under conditions of varying temperatures was investigated. Two concurrent work programs were employed to (a) fabricate resonators under precisely controlled conditions and (b) investigate their characteristics. The results of this work indicate that the performance of quartz resonators can be improved by fabricating them in systems and from materials that enable precise control of variables to be exercised. Monitoring of these variables by suitably sensitive instrumentaion is essential. (Modified author abstract)

Descriptors :   (*QUARTZ RESONATORS, AGING(MATERIALS)), CRYSTAL OSCILLATORS, MANUFACTURING, RELIABILITY

Subject Categories : Electrical and Electronic Equipment
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE