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    • 9. 发明公开
    • Oscillator with constant output level over oscillation frequency range
    • 振荡器具有用于它的整个振荡频率范围内的恒定的输出电平
    • EP1175001A2
    • 2002-01-23
    • EP01305468.9
    • 2001-06-22
    • ALPS ELECTRIC CO., LTD.
    • Yoshisato, AkiyukiUeda, KazuhikoKukita, Hiroaki
    • H03B5/12H03B5/18
    • H03B5/1847H03B5/1203H03B5/1231H03B5/1243H03B5/1841
    • An oscillator includes an oscillation circuit unit (10) and an amplification circuit unit (20) of the common-base type. The oscillation circuit unit includes an oscillation transistor (11) and a resonance circuit (12), the collector of the oscillation transistor being grounded via a first capacitor (13). The amplification circuit unit includes an amplification transistor (21), the emitter thereof being directly connected to the collector of the oscillation transistor and the base thereof being grounded via a second capacitor (28). The resonance circuit is connected between the base of the oscillation transistor and the ground. An oscillation signal output from the collector of the oscillation transistor is input to the emitter of the amplification transistor while partially being bypassed to the ground via a first capacitor. A negative feedback is provided to the amplification transistor in association with the second capacitor.
    • 振荡器包括振荡电路单元(10)和所述共基型的放大电路单元(20)。 振荡电路单元包括在振荡晶体管(11)和一个谐振电路(12),振荡晶体管的集电极通过第一电容器(13)被接地。 放大电路单元包括:在放大晶体管(21),其直接连接到振荡晶体管和其基极的集电极的发射极经由一个第二电容器(28)被接地。 谐振电路被连接在振荡晶体管和地的基极之间。 从振荡晶体管的集电极输出的振荡信号被输入到放大晶体管的发射极,而部分经由第一电容器旁路至接地。 负反馈被提供给放大晶体管与所述第二电容器的关联。