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1. 发明公开

EP1758241A1 IMAGE REMOVING CIRCUIT 审中-公开
标题翻译： BILDENTFERNUNGSSCHALTUNG
公开(公告)号：EP1758241A1
公开(公告)日：2007-02-28
申请号：EP05743918.4
申请日：2005-05-25
申请人： Niigata Seimitsu Co., Ltd.
发明人： AOYAMA, T., KABUSHIKI KAISHA TOYOTA JIDOSHOKKI , MIYAGI, Hiroshi, NIIGATA SEIMITSU CO. LTD.
IPC分类号： H03D7/18 , H04B1/26
CPC分类号： H04B1/28 , H03D7/14
摘要： In order to provide an image rejection circuit that can reject an image signal without being affected by manufacturing variations in circuit elements such as resistors, condensers, or the like, an image rejection circuit is provided which comprises a first mixer unit 2 for mixing a signal received by a receiver device with a first local oscillation signal generated by a local oscillator 1, a secondmixer unit 3 for mixing the received signal with a second local oscillation signal obtained by shifting the local oscillation signal generated by the local oscillator 1 by 90°, a polyphase filter circuit 4 including condensers C1 and switched capacitors, and a composition/output unit 5 for composing and outputting the IF signals output from the polyphase filter circuit 4.
摘要翻译：为了提供可以抑制图像信号而不受制造电路元件如电阻器，电容器等的变化影响的图像抑制电路，提供了一种图像抑制电路，其包括用于混合信号的第一混频器单元2 由本地振荡器1产生的具有第一本地振荡信号的接收机装置接收的第二混频器单元3，用于将接收信号与通过将本地振荡器1产生的本地振荡信号移位90°而获得的第二本机振荡信号混合; 包括电容器C1和开关电容器的多相滤波器电路4和用于组合和输出从多相滤波器电路4输出的IF信号的合成/输出单元5。

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