新形状GTカット水晶振動子を用いた内部温度補償型水晶発振器

抄録

This paper describes the self-temperature compensated crystal oscillator employing a new shape GT cut quartz crystal resonator. It is well-known that a new shape GT cut quartz crystal resonator manufactured by an etching process has excellent frequency temperature behavior more than the conventional GT plate manufactured by a mechanical process. However, as this GT resonator is a coupling resonator, its frequency temperature behavior varies with the circuit element such as load capacitance C_L, output resistance R_d or resistance R_<qs> connected in series to the resonator. The object of this paper is to clarify the relationship of oscillation frequency and frequency temperature coefficients versus R_d and R_<qs>. The noteworthy features are summarized as follows: (1) It is shown that the frequency temperature behavior slightly varies with R_d R_<qs>. (2) The present oscillator has the about one third value of the conventional TCXO current. (3) Hysteresis is negligibly small over a wide temperature range of -30℃〜+85℃.