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    • 8. 发明申请
    • PIEZOELECTRIC OSCILLATOR
    • 压电振荡器
    • US20080238561A1
    • 2008-10-02
    • US12058231
    • 2008-03-28
    • Takashi OtsukaHisato Takeuchi
    • Takashi OtsukaHisato Takeuchi
    • H03B5/32H03B5/36
    • H03B5/364
    • For a piezoelectric oscillator according to the present invention, an oscillator circuit includes: a piezoelectric vibrator; an NMOS transistor and a PMOS transistor that constitute an amplifier connected in parallel to the piezoelectric vibrator; and load capacitors connected in parallel to the piezoelectric vibrator. The gate terminals of the NMOS transistor and the PMOS transistor, which are constituents of the amplifier, are connected by a DC cut capacitor, and the gate terminal of the NMOS transistor and the output terminal of the amplifier are connected by a feedback resistor. An arbitrary bias voltage, to be applied to the gate terminal of the PMOS transistor via a high-frequency elimination resistor, is generated by a circuit provided by a diode-connected, second PMOS transistor.
    • 对于根据本发明的压电振荡器,振荡器电路包括:压电振动器; 构成与压电振子并联连接的放大器的NMOS晶体管和PMOS晶体管; 并将负载电容并联连接到压电振动器。 作为放大器的组成部分的NMOS晶体管和PMOS晶体管的栅极端子由直流切断电容器连接,NMOS晶体管的栅极端子和放大器的输出端子通过反馈电阻器连接。 通过由二极管连接的第二PMOS晶体管提供的电路产生经由高频消除电阻施加到PMOS晶体管的栅极端子的任意偏置电压。