| 摘要 |
PURPOSE:To suppress spurious modulation by lowering crystal impedance CI by specifying the ratio of the length from electrode terminals, provided on counter main surfaces of both oscillating arms of a tuning-fork type oscillator for an electronic wristwatch, to a groove terminal and that from the groove terminal to an electrode terminal on a base. CONSTITUTION:Oscillating arms 102 and 103 of a tuning-fork type quartz oscillator 101 are provided successively across a groove 104 and then coupled together by a base 105. The ratio l1/l of the length(l1) from the groove terminal 104a of an energizing electrode 102, formed on the main surface of the oscillating arm 102 (103), to the electrode 102b (103a) and the length (l) from the groove terminal 104a to the tip of the oscillating arm 102 (103) is set to 0.6-0.7. |
