| 摘要 |
PROBLEM TO BE SOLVED: To obtain an oscillation circuit realizing the stabilization of a frequency in the oscillation circuit for oscillating overtone. SOLUTION: The oscillation circuit consists of inverters, feedback resistors connected to the inverter in parallel, capacitors each connected between the input/output terminal of the inverter and a grounding voltage Vss, and a piezoelectric resonator connected between the input and output of the inverter. In the circuit, the problem is solved by the oscillation circuit in which the selection between oscillation of a fundamental wave and overtone oscillation, and the stabilization of oscillation can be selected by switching a feedback resistor. COPYRIGHT: (C)2004,JPO
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