| 摘要 |
<p>PROBLEM TO BE SOLVED: To stabilize an oscillation operation by installing a tank circuit, having a resonance frequency which is almost equal to a frequency peculiar to a crystal oscillator between one end of the crystal oscillator and the ground. SOLUTION: A tank circuit 50 is installed, and the resonance frequency of the tank circuit 50 is made to correspond to a frequency peculiar to a crystal oscillator Xta1. Thus, impedance between a crystal oscillator connection terminal XOUT and ground GND is set to be a maximum, and the current flowing from the crystal oscillator connection terminal XOUT to a ground GND-side through a capacitor Cout1 can be reduced. Then, an oscillation operation can be stabilized.</p> |
