A Method of Adjusting Frequency Temperature Coefficients and Resonant Frequency for NS-GT Cut Quartz Crystal Resonators

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This paper describes a method of adjusting the frequency-temperature coefficients and resonant frequency of NS-GT cut quartz crystal resonators. It is well known that NS-GT cut resonators show good frequency-temperature behavior because the first- second- and third-order temperature coefficients α_+, β_+, γ_+ for principal vibration can be approximately zero. However, a distribution of frequency-temperature behavior takes place in production. In order to obtain resonators with better and stable frequency-temperature behavior within +/-2.5 ppm over a temperature range of -30 to +85℃ in production, an absolute value of α_+ must be less than 5×10^<-8>/℃. The adjustment method described makes it possible to control α_+ easily. The NS-GT cut resonators' frequency-temperature characteristics were found to be mostly within +/-1.0 ppm in the above-mentioned temperature range.
社団法人応用物理学会の論文
1995-05-30