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    • 8. 发明申请
    • Local Oscillator Signal Generation
    • 本地振荡器信号产生
    • US20160329921A1
    • 2016-11-10
    • US15102676
    • 2014-12-10
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    • Jarkko JussilaPete SivonenMarkus Suhonen
    • H04B1/12H04L25/08H03F3/195H04L25/02H03B27/00H03F3/45
    • H04B1/123H03B27/00H03F3/195H03F3/45928H03F2200/294H04L25/0292H04L25/085
    • A local oscillator signal generation circuit (150) for generating quadrature-related local oscillator signals comprises a source signal generator (153) arranged to generate a differential-mode source signal, a buffer stage (158) coupled to an output (156) of the source signal generator (153) and arranged to buffer the differential-mode source signal, and a quadrature generation stage (170) coupled to an output (168) of the buffer stage (158) and arranged to generate an in-phase local oscillator signal and a quadrature local oscillator signal from the buffered differential-mode source signal. The buffer stage (158) comprises a primary differential amplifier (159) having an input (162) coupled to an input (157) of the buffer stage (158), and a secondary differential amplifier (160) having an input (164) coupled to an output (163) of the primary differential amplifier (159) and an output (165) coupled to the output (168) of the buffer stage (158).
    • 用于产生与正交相关的本地振荡器信号的本地振荡器信号产生电路(150)包括被布置为产生差分模式源信号的源信号发生器(153),耦合到该信号的输出(156)的缓冲级 源信号发生器(153)并且被布置为缓冲差模源信号;以及正交产生级(170),耦合到缓冲级(158)的输出端(168)并被布置成产生同相本机振荡器信号 以及来自缓冲差分模式源信号的正交本地振荡器信号。 缓冲级(158)包括具有耦合到缓冲级(158)的输入(157)的输入(162)的一级差分放大器(159)和具有输入(164)耦合的二级差分放大器 连接到一级差分放大器(159)的输出端(163)和耦合到缓冲级(158)的输出端(168)的输出端(165)。