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    • 10. 发明申请
    • MIXER CIRCUIT
    • 混频器电路
    • US20110063013A1
    • 2011-03-17
    • US12868003
    • 2010-08-25
    • Young-Jin KimIl-Ho NaChun-Sik JeongSeong-Young SonSeung-Min LeeMyung-Woon Hwang
    • Young-Jin KimIl-Ho NaChun-Sik JeongSeong-Young SonSeung-Min LeeMyung-Woon Hwang
    • G06G7/12
    • G06G7/16
    • The present invention discloses a mixer circuit for mixing two input signals by source-coupled MOS transistors and outputting a mixed result. A duty cycle controlling MOS transistor is connected to a source of each source-coupled MOS transistor in series. A duty cycle controlling pulse is applied to a gate of the duty cycle controlling MOS transistor. The duty cycle controlling pulse has a phase shift of −90 degrees with respect to a controlling pulse applied to the gate of the source-coupled MOS transistor connected with the duty cycle controlling MOS transistor in series. An AND-combination of the duty cycles of the two controlling pulses applied to the gates of the two MOS transistors connected in series can be controlled at 25%. Comparing to the conventional mixer circuit having a switch control duty cycle of 50%, the present invention achieves the effects of increasing the gain and reducing the noise figure.
    • 本发明公开了一种用于通过源极耦合MOS晶体管混合两个输入信号并输出​​混合结果的混频器电路。 占空比控制MOS晶体管串联连接到每个源极耦合MOS晶体管的源极。 占空比控制脉冲施加到占空比控制MOS晶体管的栅极。 占空比控制脉冲相对于与占空比控制MOS晶体管串联连接的源极耦合MOS晶体管的栅极的控制脉冲具有-90度的相移。 施加到串联连接的两个MOS晶体管的栅极的两个控制脉冲的占空比的AND组合可以控制在25%。 与具有50%的开关控制占空比的常规混频器电路相比,本发明实现了增加增益和降低噪声系数的效果。