METHOD FOR COMPENSATING TEMPERATURE OF SURFACE ACOUSTIC WAVE RESONATOR AND TEMPERATURE-COMPENSATION TYPE SURFACE ACOUSTIC WAVE OSCILLATOR

摘要

PROBLEM TO BE SOLVED: To perform comparatively accurate temperature compensation without using a large-scale circuit.;SOLUTION: An ambient temperature of a surface acoustic wave resonator whose temperature vs. frequency characteristic is expressed by a quadratic function is detected, and a control voltage corresponding to the ambient temperature is generated. The control voltage is changed along a straight line (a) and a straight line (b) having different slopes, corresponding to temperature changes, in a region on the side of temperatures lower than the vertex temperature Tp of the temperature vs. frequency characteristic. The control voltage is changed along a straight line (c) and a straight line (d) having different slopes, corresponding to temperature changes, in a region on the side of temperatures higher than the vertex temperature Tp.;COPYRIGHT: (C)2007,JPO&INPIT