| 摘要 |
PURPOSE:To eliminate the effect of stray capacity and to improve the characteristics, by connecting electrodes of a piezoelectric porcelain oscillator polarized in opposite polarity, in the same polarity, in a submarine wave receiver consisting of the piezoelectric porcelain oscillator and a preamplifier. CONSTITUTION:The polarity of a + and an - electrode of a piezoelectric porcelain oscillator 8b the same shape as a piezoelectric porcelain oscillator 8a, polarized in the opposite polarity as the 8a is connected in the same polarity electricaley to form new stray capacity C's1 and C's2, then the resulting value of stray capacity is Cs1+C's2=C's1+Cs2, and the input voltage to preamplifiers 21 and 22 is not effected with the stray capacity substantially and excellent characteristics can be obtained. |
