发明名称
摘要 PROBLEM TO BE SOLVED: To provide a crystal oscillation circuit capable of suppressing useless oscillation other than an original oscillation frequency by surely making oscillation in a series arm of a crystal oscillator when an extension coil is inserted. SOLUTION: In the crystal oscillation circuit in which the extension coil L1 is inserted between one end of the crystal oscillator XL and a base of a transistor Q, an additional capacitor Cx is connected to the crystal oscillator XL in parallel, a capacitor C1 connected to the other end of the crystal oscillator XL and a capacitor C2 connected to the base are used as variable capacitors, a variable capacitor C3 is provided between the extension coil L1 and the base, and the variable capacitors are controlled by a temperature compensation voltage generation circuit 3. COPYRIGHT: (C)2010,JPO&INPIT
申请公布号 JP5465891(B2) 申请公布日期 2014.04.09
申请号 JP20090035838 申请日期 2009.02.18
申请人 发明人
分类号 H03B5/32 主分类号 H03B5/32
代理机构 代理人
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