| 摘要 |
PURPOSE:To make relatively easy to suppress nearby auxiliary resonance of a quartz oscillator with an AT cut, etc., by fixing the diameter of a circular electrode, positioned at a concentric circle formed in a base plate, within fixed range. CONSTITUTION:When the radius of equivalent spherical curvature of sphere 3 of quartz oscillator 1 is denoted as R and its resonance frequency is denoted as F0, the miximum plate thickness in the center of the base plate determined by frequency F0 is represented as T. Then, diameter phie of circular electrode 2 positioned at a concentric circle formed in the center of the base plate is selected within the range shown by the expression. Consequently, the nearby auxiliary resonance can be suppressed relatively easily. |
